International Journal of Polymer Analysis and Characterization最新文献_第4页

Immobilization of α-amylase on electrospun polycaprolactone (PCL)/chitosan (CHI) nanofibers: a novel approach to improve enzyme stability and performance 静电纺聚己内酯/壳聚糖纳米纤维固定化α-淀粉酶：一种提高酶稳定性和性能的新方法

IF 1.6 4区工程技术 Q4 POLYMER SCIENCE

International Journal of Polymer Analysis and Characterization

Pub Date : 2025-10-03 Epub Date: 2025-05-22 DOI: 10.1080/1023666X.2025.2505204

Sevgi Balcıoğlu

Enhancing enzyme resistance to environmental conditions and optimizing their catalytic performance are crucial for various industrial applications. Enzyme immobilization has emerged as one of the most effective strategies to achieve these goals. In this study, polycaprolactone/chitosan (PCL/CHI) nanofibers were successfully synthesized via electrospinning, followed by the covalent immobilization of α-amylase. The immobilization efficiency was determined, and the resulting nanofibers were characterized through FT-IR, SEM, EDX, and XRD. Optimal pH and temperature conditions for the immobilized enzyme were found to be pH and 50 °C, respectively. The activation energy (Ea) calculated using the Arrhenius equation was 5.14 KJ/mol, while the kinetic parameters K_m and Vmax were determined as 0.37 ± 0.11 mg/mL and 6.23 ± 0.87 µmol/min, respectively. Thermal stability tests revealed that at 50 °C, the immobilized enzyme retained over 50% of its initial activity. Additionally, the immobilized enzyme exhibited enhanced resistance to environmental stressors, including metal ions and organic solvents, compared to its free counterpart. The results confirm that the immobilization process not only improves enzyme stability but also boosts catalytic efficiency under specific conditions. This study provides a cost-effective, scalable, and practical approach for enzyme immobilization using electrospinning, with significant potential for industrial applications.

提高酶对环境条件的抗性和优化其催化性能对各种工业应用至关重要。酶固定化已成为实现这些目标的最有效策略之一。本研究采用静电纺丝法制备了聚己内酯/壳聚糖（PCL/CHI）纳米纤维，并对α-淀粉酶进行共价固定。采用红外光谱（FT-IR）、扫描电镜（SEM）、电子能谱（EDX）和x射线衍射（XRD）对纳米纤维进行了表征。固定化酶的最佳温度和pH分别为50℃和50℃。利用Arrhenius方程计算得到的活化能Ea为5.14 KJ/mol，动力学参数Km和Vmax分别为0.37±0.11 mg/mL和6.23±0.87µmol/min。热稳定性测试表明，在50°C时，固定化酶保留了50%以上的初始活性。此外，与游离酶相比，固定化酶对环境应激因子（包括金属离子和有机溶剂）的抵抗力增强。结果证实，在特定条件下，固定化过程不仅提高了酶的稳定性，而且提高了催化效率。本研究为静电纺丝固定化酶提供了一种经济、可扩展、实用的方法，具有重要的工业应用潜力。

{"title":"Immobilization of α-amylase on electrospun polycaprolactone (PCL)/chitosan (CHI) nanofibers: a novel approach to improve enzyme stability and performance","authors":"Sevgi Balcıoğlu","doi":"10.1080/1023666X.2025.2505204","DOIUrl":"10.1080/1023666X.2025.2505204","url":null,"abstract":"<div><div>Enhancing enzyme resistance to environmental conditions and optimizing their catalytic performance are crucial for various industrial applications. Enzyme immobilization has emerged as one of the most effective strategies to achieve these goals. In this study, polycaprolactone/chitosan (PCL/CHI) nanofibers were successfully synthesized via electrospinning, followed by the covalent immobilization of α-amylase. The immobilization efficiency was determined, and the resulting nanofibers were characterized through FT-IR, SEM, EDX, and XRD. Optimal pH and temperature conditions for the immobilized enzyme were found to be pH and 50 °C, respectively. The activation energy (Ea) calculated using the Arrhenius equation was 5.14 KJ/mol, while the kinetic parameters <em>K<sub>m</sub></em> and <em>Vmax</em> were determined as 0.37 ± 0.11 mg/mL and 6.23 ± 0.87 µmol/min, respectively. Thermal stability tests revealed that at 50 °C, the immobilized enzyme retained over 50% of its initial activity. Additionally, the immobilized enzyme exhibited enhanced resistance to environmental stressors, including metal ions and organic solvents, compared to its free counterpart. The results confirm that the immobilization process not only improves enzyme stability but also boosts catalytic efficiency under specific conditions. This study provides a cost-effective, scalable, and practical approach for enzyme immobilization using electrospinning, with significant potential for industrial applications.</div></div>","PeriodicalId":14236,"journal":{"name":"International Journal of Polymer Analysis and Characterization","volume":"30 7","pages":"Pages 851-866"},"PeriodicalIF":1.6,"publicationDate":"2025-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145195753","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Poly(ethylene-co-methacrylic acid) ionomer dynamic phase composition and polymer chain mobility characterization by time domain NMR 聚乙烯-共甲基丙烯酸离聚体动态相组成及聚合物链迁移率的时域核磁共振表征

IF 1.6 4区工程技术 Q4 POLYMER SCIENCE

International Journal of Polymer Analysis and Characterization

Pub Date : 2025-10-03 Epub Date: 2025-07-29 DOI: 10.1080/1023666X.2025.2462057

Chen Zheng , Yifan Xu , Zheng Zhang , Qiangqiang Yan , Amy Song , Xiaohua Qiu , Nathan Rau , Ray Drumright

We report a convenient approach for characterizing poly(ethylene-co-methacrylic acid) (EMAA) using time domain NMR. The T₂ relaxation curve of EMAA can be obtained by the Carr-Purcell-Meiboom-Gill (CPMG) pulse sequence and analyzed with a three-component model. The dynamic phase distribution (the aggregation of relaxation components with similar mobility) and overall polymer chain mobility results showed good agreement with well-known EMAA ionomer properties and Hahn Echo pulse sequence experiments. Subsequently, plasticizer's impact on the EMAA network was studied with the method established here. Plasticizer-induced dynamic phase redistribution and chain mobility changes can be revealed by time domain NMR (TD NMR) analysis, enabling researchers to better understand the plasticizer–polymer interaction mechanism. In conclusion, TD NMR characterization of EMAA polymers provided a new perspective on the structural features and dynamics of these materials. The method has the potential to be adopted in R&D labs, processing labs, or plant quality assurance/quality control.

我们报道了一种用时域核磁共振表征聚乙烯-共甲基丙烯酸（EMAA）的简便方法。通过carr - purcell - meiboomm - gill （CPMG）脉冲序列得到EMAA的T2弛豫曲线，并采用三分量模型进行分析。动态相分布（具有相似迁移率的弛豫组分聚集）和聚合物整体链迁移率结果与已知的EMAA离聚体性质和Hahn Echo脉冲序列实验结果吻合良好。随后，用本文建立的方法研究了增塑剂对EMAA网络的影响。通过时域核磁共振（TD NMR）分析可以揭示增塑剂诱导的动态相重分布和链迁移率变化，使研究人员能够更好地了解增塑剂与聚合物的相互作用机理。总之，EMAA聚合物的TD NMR表征为这些材料的结构特征和动力学提供了新的视角。该方法有可能在研发实验室、加工实验室或工厂质量保证/质量控制中采用。

{"title":"Poly(ethylene-co-methacrylic acid) ionomer dynamic phase composition and polymer chain mobility characterization by time domain NMR","authors":"Chen Zheng , Yifan Xu , Zheng Zhang , Qiangqiang Yan , Amy Song , Xiaohua Qiu , Nathan Rau , Ray Drumright","doi":"10.1080/1023666X.2025.2462057","DOIUrl":"10.1080/1023666X.2025.2462057","url":null,"abstract":"<div><div>We report a convenient approach for characterizing poly(ethylene-co-methacrylic acid) (EMAA) using time domain NMR. The T<sub>2</sub> relaxation curve of EMAA can be obtained by the Carr-Purcell-Meiboom-Gill (CPMG) pulse sequence and analyzed with a three-component model. The dynamic phase distribution (the aggregation of relaxation components with similar mobility) and overall polymer chain mobility results showed good agreement with well-known EMAA ionomer properties and Hahn Echo pulse sequence experiments. Subsequently, plasticizer's impact on the EMAA network was studied with the method established here. Plasticizer-induced dynamic phase redistribution and chain mobility changes can be revealed by time domain NMR (TD NMR) analysis, enabling researchers to better understand the plasticizer–polymer interaction mechanism. In conclusion, TD NMR characterization of EMAA polymers provided a new perspective on the structural features and dynamics of these materials. The method has the potential to be adopted in R&D labs, processing labs, or plant quality assurance/quality control.</div></div>","PeriodicalId":14236,"journal":{"name":"International Journal of Polymer Analysis and Characterization","volume":"30 7","pages":"Pages 867-876"},"PeriodicalIF":1.6,"publicationDate":"2025-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145195754","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Enhanced bioactivity of regenerated eggshell membrane hydrogels with strontium-doped hydroxyapatite for potential bone tissue regeneration 含锶羟基磷灰石的再生蛋壳膜水凝胶对骨组织再生的生物活性增强

IF 1.7 4区工程技术 Q4 POLYMER SCIENCE

International Journal of Polymer Analysis and Characterization

Pub Date : 2025-08-18 Epub Date: 2025-05-03 DOI: 10.1080/1023666X.2025.2497389

Aakriti Aggarwal , Lajpreet Kaur , Debasish Nath , Himanshu Ojha , Asish Pal , Mahesh Kumar Sah

Tissue engineering has emerged as a promising alternative for bone repair. Avian eggshell membrane stands out among potential biomaterials due to its low immunogenicity, similarity to the extracellular matrix, and widespread availability. This study focuses on developing a bone ingrowth support system from a regenerated avian eggshell membrane. The collagenous and non-collagenous protein fractions were developed into hydrogels with poly-(vinyl alcohol) (PVA) via freeze-thawing, followed by their incorporation with hydroxyapatite and strontium-doped hydroxyapatite synthesized from the eggshell cuticle. Their physicochemical analysis revealed the biphasic nature of hydroxyapatite and Ca/P and (Ca + Sr)/P ratios of 1.25 and 1.27, respectively. The characterization with ATR-FTIR revealed the identification of amide I, amide III, and –OH functional groups at 1639 cm⁻¹, 1264 cm⁻¹, and 3308 cm⁻¹, respectively, for all the hydrogels, along with a broad peak observed between 16° and 24° (2θ) in the XRD data. Evaluation of hydrogels’ morphology, degradation (40%−50%), swelling (162%−750%), mechanical properties (1.4 MPa–3.5 MPa), and biocompatibility with osteoblasts (>87%) demonstrated their suitability for bone regeneration. Further, histopathological examination of rat tibial bone demonstrated enhanced bone repair, with the findings strongly suggesting the potential application of the regenerated avian eggshell membrane in promoting bone regeneration.

组织工程已经成为一种很有前途的骨修复方法。禽蛋壳膜因其低免疫原性、与细胞外基质相似以及广泛可用性而在潜在的生物材料中脱颖而出。本研究的重点是利用再生的禽蛋壳膜制备骨长入支撑系统。将胶原蛋白和非胶原蛋白用聚乙烯醇（PVA）冻融成水凝胶，然后与从蛋壳角质层合成的羟基磷灰石和掺锶羟基磷灰石掺入。理化分析表明，羟基磷灰石具有双相性质，Ca/P和(Ca + Sr)/P比值分别为1.25和1.27。ATR-FTIR表征表明，所有水凝胶在1639 cm−1、1264 cm−1和3308 cm−1处分别鉴定出酰胺I、酰胺III和-OH官能团，并在16°和24°（2θ）处观察到一个宽峰。水凝胶的形态、降解（40% - 50%）、肿胀（162% - 750%）、力学性能（1.4 MPa - 3.5 MPa）和与成骨细胞的生物相容性（87%）的评估表明它们适合骨再生。此外，大鼠胫骨的组织病理学检查显示骨修复增强，这一发现强烈提示再生禽蛋壳膜在促进骨再生方面的潜在应用。

{"title":"Enhanced bioactivity of regenerated eggshell membrane hydrogels with strontium-doped hydroxyapatite for potential bone tissue regeneration","authors":"Aakriti Aggarwal , Lajpreet Kaur , Debasish Nath , Himanshu Ojha , Asish Pal , Mahesh Kumar Sah","doi":"10.1080/1023666X.2025.2497389","DOIUrl":"10.1080/1023666X.2025.2497389","url":null,"abstract":"<div><div>Tissue engineering has emerged as a promising alternative for bone repair. Avian eggshell membrane stands out among potential biomaterials due to its low immunogenicity, similarity to the extracellular matrix, and widespread availability. This study focuses on developing a bone ingrowth support system from a regenerated avian eggshell membrane. The collagenous and non-collagenous protein fractions were developed into hydrogels with poly-(vinyl alcohol) (PVA) via freeze-thawing, followed by their incorporation with hydroxyapatite and strontium-doped hydroxyapatite synthesized from the eggshell cuticle. Their physicochemical analysis revealed the biphasic nature of hydroxyapatite and Ca/P and (Ca + Sr)/P ratios of 1.25 and 1.27, respectively. The characterization with ATR-FTIR revealed the identification of amide I, amide III, and –OH functional groups at 1639 cm<sup>−1</sup>, 1264 cm<sup>−1</sup>, and 3308 cm<sup>−1</sup>, respectively, for all the hydrogels, along with a broad peak observed between 16° and 24° (2θ) in the XRD data. Evaluation of hydrogels’ morphology, degradation (40%−50%), swelling (162%−750%), mechanical properties (1.4 MPa–3.5 MPa), and biocompatibility with osteoblasts (>87%) demonstrated their suitability for bone regeneration. Further, histopathological examination of rat tibial bone demonstrated enhanced bone repair, with the findings strongly suggesting the potential application of the regenerated avian eggshell membrane in promoting bone regeneration.</div></div>","PeriodicalId":14236,"journal":{"name":"International Journal of Polymer Analysis and Characterization","volume":"30 6","pages":"Pages 675-690"},"PeriodicalIF":1.7,"publicationDate":"2025-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144653024","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Tuning the properties of novel and biodegradable ethyl-cellulose (EC)/rGO nanocomposite 调整新型可生物降解乙基纤维素/氧化石墨烯纳米复合材料的性能

IF 1.7 4区工程技术 Q4 POLYMER SCIENCE

International Journal of Polymer Analysis and Characterization

Pub Date : 2025-08-18 Epub Date: 2025-05-13 DOI: 10.1080/1023666X.2025.2502811

K. K. Khichar , Ravina , S. B. Dangi , S. Z. Hashmi , B. L. Choudhary , N. S. Leel , Saurabh Dalela , A. M. Quraishi , Shalendra Kumar , Balsam F. I. Sofi , Aakansha , P. A. Alvi

This study investigates the tunable properties of novel and biodegradable ethyl cellulose (EC)/reduced graphene oxide (rGO) nanocomposites by varying concentrations of rGO nanofillers. The EC/rGO nanocomposites were prepared by an uncomplicated chemical mixing route. The influence of rGO content on the structural, optical, and electrical properties of the nanocomposite was systematically studied. The obtained results reveal that the incorporation of rGO enhances the crystallite size with reduced dislocation density and micro-strain in the nanocomposites. The incorporation of rGO was found capable of reducing bandgaps significantly by a magnitude of ∼0.62 eV with an increase in Urbach energy of ∼0.76 eV and a less enhanced refractive index of the nanocomposite. Further, D, G, 2D, and (D + G) modes were found to be present to define the Raman spectra of the nanocomposites. From FTIR spectra, the presence of C–H, C = O, and C–O stretching vibrations in the composite was confirmed. Moreover, electrical constraints, such as dielectric constant, dissipation factor, and ac and dc conductivity, along with frequency exponent, were found to be enhanced by increasing the strength of the incorporated rGO nanofiller. Thus, the findings provide critical insights into the design of biodegradable and multifunctional nanocomposites, paving the way for their application in sustainable packaging, electronics, and biomedical devices.

本研究通过不同浓度的还原氧化石墨烯纳米填料研究了新型可生物降解乙基纤维素(EC)/还原氧化石墨烯（rGO）纳米复合材料的可调性能。采用简单的化学混合方法制备了EC/rGO纳米复合材料。系统研究了还原氧化石墨烯含量对纳米复合材料结构、光学和电学性能的影响。结果表明，氧化石墨烯的加入使纳米复合材料的晶粒尺寸增大，位错密度减小，微应变减小。研究发现，rGO的掺入能够显著降低带隙约0.62 eV，乌尔巴赫能量增加约0.76 eV，纳米复合材料的折射率增强较小。此外，还发现了D、G、2D和（D + G）模式来定义纳米复合材料的拉曼光谱。从FTIR光谱中，证实了复合材料中存在C - h， C = O和C - O拉伸振动。此外，电学约束，如介电常数、耗散因子、交流和直流电导率，以及频率指数，被发现通过增加掺入的氧化石墨烯纳米填料的强度而增强。因此，这些发现为设计可生物降解的多功能纳米复合材料提供了重要的见解，为其在可持续包装、电子和生物医学设备中的应用铺平了道路。

{"title":"Tuning the properties of novel and biodegradable ethyl-cellulose (EC)/rGO nanocomposite","authors":"K. K. Khichar ,  Ravina , S. B. Dangi , S. Z. Hashmi , B. L. Choudhary , N. S. Leel , Saurabh Dalela , A. M. Quraishi , Shalendra Kumar , Balsam F. I. Sofi ,  Aakansha , P. A. Alvi","doi":"10.1080/1023666X.2025.2502811","DOIUrl":"10.1080/1023666X.2025.2502811","url":null,"abstract":"<div><div>This study investigates the tunable properties of novel and biodegradable ethyl cellulose (EC)/reduced graphene oxide (rGO) nanocomposites by varying concentrations of rGO nanofillers. The EC/rGO nanocomposites were prepared by an uncomplicated chemical mixing route. The influence of rGO content on the structural, optical, and electrical properties of the nanocomposite was systematically studied. The obtained results reveal that the incorporation of rGO enhances the crystallite size with reduced dislocation density and micro-strain in the nanocomposites. The incorporation of rGO was found capable of reducing bandgaps significantly by a magnitude of ∼0.62 eV with an increase in Urbach energy of ∼0.76 eV and a less enhanced refractive index of the nanocomposite. Further, D, G, 2D, and (D + G) modes were found to be present to define the Raman spectra of the nanocomposites. From FTIR spectra, the presence of C–H, C = O, and C–O stretching vibrations in the composite was confirmed. Moreover, electrical constraints, such as dielectric constant, dissipation factor, and ac and dc conductivity, along with frequency exponent, were found to be enhanced by increasing the strength of the incorporated rGO nanofiller. Thus, the findings provide critical insights into the design of biodegradable and multifunctional nanocomposites, paving the way for their application in sustainable packaging, electronics, and biomedical devices.</div></div>","PeriodicalId":14236,"journal":{"name":"International Journal of Polymer Analysis and Characterization","volume":"30 6","pages":"Pages 711-727"},"PeriodicalIF":1.7,"publicationDate":"2025-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144653651","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Assessment of physical and mechanical and tribological characteristics of poly methyl methacrylate denture based composites doped with nano ceramic particles: a review 掺杂纳米陶瓷颗粒的聚甲基丙烯酸甲酯义齿基复合材料的物理力学和摩擦学特性评价

IF 1.7 4区工程技术 Q4 POLYMER SCIENCE

International Journal of Polymer Analysis and Characterization

Pub Date : 2025-08-18 Epub Date: 2025-06-03 DOI: 10.1080/1023666X.2025.2504552

Dinesh Kumar Patel , Sachin Kumar , Gaurav Nandan , Shiv Ranjan Kumar

Poly methyl methacrylate (PMMA) is the most often used acrylic for partial and full dentures. Denture fractures are induced by fatigue as a result of repeated masticatory, flexural, and impact stresses. PMMA’s remarkable qualities, such as beauty, cost-effectiveness, ease of manipulation, low density, and tunable mechanical properties, make it an ideal option for use in dentistry. The durability of pure PMMA is improved by incorporating appropriate weight percentages of nano reinforcement of ceramic material. The doping of nano-reinforcement materials enhances the tensile strength, compressive strength, micro-hardness; flexural strength, yield strength, impact strength, transverse strength, thermal expansion coefficient and decreases water sorption of PMMA composites investigated by different researchers. This study explores how the biopolymer matrix (PMMA) is affected by aluminum oxide (Al₂O₃), zirconium oxide (ZrO₂), and titaniun dioxide (TiO₂) reinforcements in terms of mechanical, physical, and tribological characteristics of PMMA dental composites. Additionally, the applications of polymer- based composites are explored.

聚甲基丙烯酸甲酯（PMMA）是最常用的丙烯酸树脂用于部分和全口义齿。假牙骨折是由反复咀嚼、弯曲和冲击应力引起的疲劳引起的。PMMA的卓越品质，如美观，成本效益，易于操作，低密度和可调的机械性能，使其成为牙科应用的理想选择。通过加入适当重量百分比的纳米增强陶瓷材料，提高了纯PMMA的耐久性。纳米增强材料的掺杂提高了材料的抗拉强度、抗压强度、显微硬度；不同研究人员对PMMA复合材料的抗弯强度、屈服强度、冲击强度、横向强度、热膨胀系数和减水性进行了研究。本研究探讨了氧化铝（Al2O3）、氧化锆（ZrO2）和二氧化钛（TiO2）增强剂对PMMA牙科复合材料的机械、物理和摩擦学特性的影响。此外，还对聚合物基复合材料的应用进行了探讨。

{"title":"Assessment of physical and mechanical and tribological characteristics of poly methyl methacrylate denture based composites doped with nano ceramic particles: a review","authors":"Dinesh Kumar Patel , Sachin Kumar , Gaurav Nandan , Shiv Ranjan Kumar","doi":"10.1080/1023666X.2025.2504552","DOIUrl":"10.1080/1023666X.2025.2504552","url":null,"abstract":"<div><div>Poly methyl methacrylate (PMMA) is the most often used acrylic for partial and full dentures. Denture fractures are induced by fatigue as a result of repeated masticatory, flexural, and impact stresses. PMMA’s remarkable qualities, such as beauty, cost-effectiveness, ease of manipulation, low density, and tunable mechanical properties, make it an ideal option for use in dentistry. The durability of pure PMMA is improved by incorporating appropriate weight percentages of nano reinforcement of ceramic material. The doping of nano-reinforcement materials enhances the tensile strength, compressive strength, micro-hardness; flexural strength, yield strength, impact strength, transverse strength, thermal expansion coefficient and decreases water sorption of PMMA composites investigated by different researchers. This study explores how the biopolymer matrix (PMMA) is affected by aluminum oxide (Al<sub>2</sub>O<sub>3</sub>), zirconium oxide (ZrO<sub>2</sub>), and titaniun dioxide (TiO<sub>2</sub>) reinforcements in terms of mechanical, physical, and tribological characteristics of PMMA dental composites. Additionally, the applications of polymer- based composites are explored.</div></div>","PeriodicalId":14236,"journal":{"name":"International Journal of Polymer Analysis and Characterization","volume":"30 6","pages":"Pages 740-759"},"PeriodicalIF":1.7,"publicationDate":"2025-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144653137","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The relationship between thermal, rheological, and tack properties of copolyester-based hot melt adhesives 共聚酯基热熔胶的热、流变和粘性之间的关系

IF 1.7 4区工程技术 Q4 POLYMER SCIENCE

International Journal of Polymer Analysis and Characterization

Pub Date : 2025-08-18 Epub Date: 2025-05-16 DOI: 10.1080/1023666X.2025.2501584

Michał Misiak , Paulina Latko-Durałek , Maria Mercedes Fernandez , Jorge L. Olmedo-Martínez , Dorota Kołbuk , Żaneta Górecka , Amir Malmir , Paulina Kozera , Alejandro J. Müller , Savvas G. Hatzikiriakos , Anna Boczkowska

This paper studies the interrelationships between the molecular weight, rheology, crystallinity, and tackiness of three types of commercial thermoplastic hot melt adhesives. The hot melt adhesives employed here differ in their compositions and molecular weights, even though all are copolyesters primarily based on poly(butylene terephthalate). Differences in the composition were found to influence the adhesives’ crystallization and melting behavior. These structural variations can translate into different thermal responses and processing characteristics relevant for tailoring adhesive selection to application requirements. Furthermore, adhesives with higher molecular weight were observed to possess larger elasticity, leading to significantly enhanced tackiness properties, as evidenced by the higher values of tensile modulus, peak stress, and work of debonding. This elevated tackiness was linked to the increased fibrillation process observed in polymers with higher molecular weights. Additionally, all tested adhesives exhibited storage moduli below the Dahlquist threshold (G′ < 3.3 × 10⁵ Pa), which supports their ability to achieve measurable tackiness during the initial bonding process. The results presented in this study underscore the diversity among hot melt adhesives and the critical properties that should be considered when selecting adhesives for specific applications.

本文研究了三种商用热塑性热熔胶的分子量、流变性、结晶度和粘性之间的相互关系。这里使用的热熔胶在成分和分子量上有所不同，尽管它们都是主要基于聚对苯二甲酸丁二酯的共聚聚酯。研究发现，不同成分对胶粘剂的结晶和熔化行为有影响。这些结构变化可以转化为不同的热响应和加工特性，从而根据应用要求定制粘合剂选择。此外，高分子量的胶粘剂具有更大的弹性，从而显著增强粘接性能，其拉伸模量、峰值应力和脱粘功均较高。这种升高的粘性与在分子量较高的聚合物中观察到的纤颤过程增加有关。此外，所有测试的粘合剂都显示出低于Dahlquist阈值(G ' <；3.3 × 105 Pa)，这支持了它们在初始粘合过程中实现可测量粘性的能力。本研究的结果强调了热熔胶的多样性以及在为特定应用选择粘合剂时应考虑的关键性能。

{"title":"The relationship between thermal, rheological, and tack properties of copolyester-based hot melt adhesives","authors":"Michał Misiak , Paulina Latko-Durałek , Maria Mercedes Fernandez , Jorge L. Olmedo-Martínez , Dorota Kołbuk , Żaneta Górecka , Amir Malmir , Paulina Kozera , Alejandro J. Müller , Savvas G. Hatzikiriakos , Anna Boczkowska","doi":"10.1080/1023666X.2025.2501584","DOIUrl":"10.1080/1023666X.2025.2501584","url":null,"abstract":"<div><div>This paper studies the interrelationships between the molecular weight, rheology, crystallinity, and tackiness of three types of commercial thermoplastic hot melt adhesives. The hot melt adhesives employed here differ in their compositions and molecular weights, even though all are copolyesters primarily based on poly(butylene terephthalate). Differences in the composition were found to influence the adhesives’ crystallization and melting behavior. These structural variations can translate into different thermal responses and processing characteristics relevant for tailoring adhesive selection to application requirements. Furthermore, adhesives with higher molecular weight were observed to possess larger elasticity, leading to significantly enhanced tackiness properties, as evidenced by the higher values of tensile modulus, peak stress, and work of debonding. This elevated tackiness was linked to the increased fibrillation process observed in polymers with higher molecular weights. Additionally, all tested adhesives exhibited storage moduli below the Dahlquist threshold (G′ < 3.3 × 10<sup>5</sup> Pa), which supports their ability to achieve measurable tackiness during the initial bonding process. The results presented in this study underscore the diversity among hot melt adhesives and the critical properties that should be considered when selecting adhesives for specific applications.</div></div>","PeriodicalId":14236,"journal":{"name":"International Journal of Polymer Analysis and Characterization","volume":"30 6","pages":"Pages 691-710"},"PeriodicalIF":1.7,"publicationDate":"2025-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144653650","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Synthesis and characterization of a set of novel copolymers by using RAFT polymerization method and “grafting through” strategy RAFT聚合和接枝共聚物的合成及表征

IF 1.7 4区工程技术 Q4 POLYMER SCIENCE

International Journal of Polymer Analysis and Characterization

Pub Date : 2025-08-18 Epub Date: 2025-05-13 DOI: 10.1080/1023666X.2025.2502819

Bedrettin Savaş , Abdullah Karanfil , Efkan Çatıker , Temel Öztürk

This study synthesized a series of novel copolymers by introducing the polyethylene glycol segments to the polymethyl methacrylate skeleton. For this purpose, S,S’-(ethane-1,2-diyl) O,O’-diethyl bis(carbonodithioate), named RAFT agent, was synthesized by reacting 1,2-dibromoethane with potassium ethyl xanthogenate. Poly(methyl methacrylate-co-polyethylene glycol monomethyl ether monomethacrylate) [poly(MMA-co-PEGMMA)] copolymer was synthesized by reversible addition-fragmentation chain transfer polymerization (RAFT) method and the “grafting through” strategy using the RAFT agent, methyl methacrylate, and different lengths (Mw of PEG unit = 200, 400, and 1000 g.mol⁻¹) of polyethylene glycol monomethyl ether monomethacrylate (PEGMMA) as macromonomers. The three copolymers of poly(MMA-co-PEGMMA) with three different grafting degrees (5, 10, and 20% by mass) were obtained successfully. Structural and thermal features of poly(MMA-co-PEGMMA) copolymers were examined using FT-IR, ¹H-NMR, GPC, TGA, and DSC methods.

本研究通过在聚甲基丙烯酸甲酯骨架上引入聚乙二醇段，合成了一系列新型共聚物。为此，以1,2-二溴乙烷和乙基黄原酸钾为原料，合成了S，S ' -（乙烷-1,2-二基）O,O ' -二乙基双（碳酸二硫酸盐）RAFT试剂。以RAFT助剂、甲基丙烯酸甲酯和不同长度（PEG单元的分子量分别为200、400和1000 g.mol - 1）的聚乙二醇单甲醚单甲基丙烯酸甲酯（PEGMMA）为大单体，采用可逆加成-破碎链转移聚合（RAFT）法和接枝策略合成了聚(甲基丙烯酸甲酯-共聚（MMA-co-PEGMMA）共聚物。成功地得到了三种不同接枝度（5、10和20%质量比）的聚（MMA-co-PEGMMA）共聚物。采用FT-IR、1H-NMR、GPC、TGA和DSC等方法研究了聚（MMA-co-PEGMMA）共聚物的结构和热特性。

{"title":"Synthesis and characterization of a set of novel copolymers by using RAFT polymerization method and “grafting through” strategy","authors":"Bedrettin Savaş , Abdullah Karanfil , Efkan Çatıker , Temel Öztürk","doi":"10.1080/1023666X.2025.2502819","DOIUrl":"10.1080/1023666X.2025.2502819","url":null,"abstract":"<div><div>This study synthesized a series of novel copolymers by introducing the polyethylene glycol segments to the polymethyl methacrylate skeleton. For this purpose, S,S’-(ethane-1,2-diyl) O,O’-diethyl bis(carbonodithioate), named RAFT agent, was synthesized by reacting 1,2-dibromoethane with potassium ethyl xanthogenate. Poly(methyl methacrylate-co-polyethylene glycol monomethyl ether monomethacrylate) [poly(MMA-co-PEGMMA)] copolymer was synthesized by reversible addition-fragmentation chain transfer polymerization (RAFT) method and the “grafting through” strategy using the RAFT agent, methyl methacrylate, and different lengths (Mw of PEG unit = 200, 400, and 1000 g.mol<sup>−1</sup>) of polyethylene glycol monomethyl ether monomethacrylate (PEGMMA) as macromonomers. The three copolymers of poly(MMA-co-PEGMMA) with three different grafting degrees (5, 10, and 20% by mass) were obtained successfully. Structural and thermal features of poly(MMA-co-PEGMMA) copolymers were examined using FT-IR, <sup>1</sup>H-NMR, GPC, TGA, and DSC methods.</div></div>","PeriodicalId":14236,"journal":{"name":"International Journal of Polymer Analysis and Characterization","volume":"30 6","pages":"Pages 728-739"},"PeriodicalIF":1.7,"publicationDate":"2025-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144653023","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Structural, mechanical, thermal characterizations of Agave sisalana fiber- reinforced composite and finite element analysis of composite helical compression spring 龙舌兰纤维增强复合材料的结构、力学、热特性及复合螺旋压缩弹簧的有限元分析

IF 1.7 4区工程技术 Q4 POLYMER SCIENCE

International Journal of Polymer Analysis and Characterization

Pub Date : 2025-08-18 Epub Date: 2025-05-06 DOI: 10.1080/1023666X.2025.2496306

C. Balaji Ayyanar , N. Sridhar , T. Mugilan , S. K. Pradeepmohan

Despite having been studied in a range of applications, the use of sisal fiber-reinforced composites in helical compression springs is rare. Thus, this particular study shows the feasibility of replacing conventional metal springs with lightweight composite springs in the interest of furthering sustainable engineering. This study focused on the successful fabrication of a helical compression spring using the filament winding process – a method not very commonly applied to such components. The tensile strength of 66.74 MPa and flexural strength of 70.47 MPa composite specimens were found. The surface morphology and elemental compositions of the composite were found through FESEM and EDX. The DSC analysis found the onset temperature of the thermal event begins at 351.7 °C and ends at 392.8 °C. The area under the peak, representing the energy absorbed, is 100.4 J/g, indicating the amount of heat involved during crosslinking of the composite matrix. The TG analysis revealed the stability of the composite from ∼30 °C to ∼300 °C. Around 300 °C, there is a significant drop in residual weight, indicating decomposition of the composite. The helical compression spring was designed and fabricated through the filament winding process. A 3D model of the spring was developed using SolidWorks and finite element analysis (FEA) of the spring was done using ANSYS. The results revealed a maximum stiffness of 1.87 N/mm at 35 N, validating the material for low-strength applications. Future work should optimize fiber–matrix interaction and study the proposed composite for lightweight suspension systems, vibration-damping components, and other eco-friendly options in the automotive industries.

尽管已经研究了一系列的应用，剑麻纤维增强复合材料在螺旋压缩弹簧的使用是罕见的。因此，这项特别的研究表明，为了进一步促进可持续工程的发展，用轻质复合弹簧取代传统金属弹簧是可行的。这项研究的重点是成功地制造了螺旋压缩弹簧，使用长丝缠绕工艺-一种不太常用的方法应用于此类组件。复合材料的抗拉强度为66.74 MPa，抗折强度为70.47 MPa。通过FESEM和EDX分析了复合材料的表面形貌和元素组成。DSC分析发现热事件的起始温度为351.7℃，结束温度为392.8℃。峰下面积代表吸收的能量，为100.4 J/g，表示复合基体交联过程中所涉及的热量。热重分析显示复合材料在~ 30°C到~ 300°C之间具有稳定性。在300℃左右，残余重量显著下降，表明复合材料分解。采用长丝缠绕工艺设计并制作了螺旋压缩弹簧。利用SolidWorks软件建立了弹簧的三维模型，利用ANSYS软件对弹簧进行了有限元分析。结果显示，在35牛的情况下，该材料的最大刚度为1.87牛/毫米，验证了该材料的低强度应用。未来的工作应该是优化纤维-基质的相互作用，并研究轻型悬架系统、减振部件和其他环保汽车行业的复合材料。

{"title":"Structural, mechanical, thermal characterizations of Agave sisalana fiber- reinforced composite and finite element analysis of composite helical compression spring","authors":"C. Balaji Ayyanar , N. Sridhar , T. Mugilan , S. K. Pradeepmohan","doi":"10.1080/1023666X.2025.2496306","DOIUrl":"10.1080/1023666X.2025.2496306","url":null,"abstract":"<div><div>Despite having been studied in a range of applications, the use of sisal fiber-reinforced composites in helical compression springs is rare. Thus, this particular study shows the feasibility of replacing conventional metal springs with lightweight composite springs in the interest of furthering sustainable engineering. This study focused on the successful fabrication of a helical compression spring using the filament winding process – a method not very commonly applied to such components. The tensile strength of 66.74 MPa and flexural strength of 70.47 MPa composite specimens were found. The surface morphology and elemental compositions of the composite were found through FESEM and EDX. The DSC analysis found the onset temperature of the thermal event begins at 351.7 °C and ends at 392.8 °C. The area under the peak, representing the energy absorbed, is 100.4 J/g, indicating the amount of heat involved during crosslinking of the composite matrix. The TG analysis revealed the stability of the composite from ∼30 °C to ∼300 °C. Around 300 °C, there is a significant drop in residual weight, indicating decomposition of the composite. The helical compression spring was designed and fabricated through the filament winding process. A 3D model of the spring was developed using SolidWorks and finite element analysis (FEA) of the spring was done using ANSYS. The results revealed a maximum stiffness of 1.87 N/mm at 35 N, validating the material for low-strength applications. Future work should optimize fiber–matrix interaction and study the proposed composite for lightweight suspension systems, vibration-damping components, and other eco-friendly options in the automotive industries.</div></div>","PeriodicalId":14236,"journal":{"name":"International Journal of Polymer Analysis and Characterization","volume":"30 6","pages":"Pages 650-665"},"PeriodicalIF":1.7,"publicationDate":"2025-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144653653","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Dielectric and thermal behavior analysis of polyester composites filled with pineapple wood dust using finite element method 菠萝木屑填充聚酯复合材料介电和热行为的有限元分析

IF 1.7 4区工程技术 Q4 POLYMER SCIENCE

International Journal of Polymer Analysis and Characterization

Pub Date : 2025-08-18 Epub Date: 2025-05-15 DOI: 10.1080/1023666X.2025.2496319

Bishnupriya Sahoo , Priyabrat Pradhan , Abhilash Purohit , Hemalata Jena , Bibhuti Bhusan Sahoo

This study examines the dielectric and thermal characterization of pineapple wood dust (PWD)-filled polymer composites using the finite element method and experimental analysis. PWD was reinforced with polyester resin with different weight (0–25 wt. %) and volume (0–17.95 vol. %) percentages. Thermal conductivity tests were conducted as per the ASTM E-1530 in a Unitherm^™ 2022 model, whereas the dielectric properties were tested with the help of an HP LCR impedance analyzer and an HP 16451B dielectric tester. The experimental result showed a decrease in thermal conductivity values of polyester resin from 0.342 to 0.245 W/m-K with the inclusion of 17.95 vol. % PWD, which ensured enhanced thermal insulation. Further, the thermal conductivity values obtained from finite element analysis simulated using Digimat software were in good agreement with experimental values, and the error lies in between 1% and 10%. The experimental result showed a decrease in thermal conductivity values with increased PWD loading, which ensured enhanced thermal insulation. Further, the thermal conductivity values obtained from finite element analysis simulated using Digimat software were in good agreement with experimental values. The finite element analysis also revealed a decrease in heat flux density with the addition of PWD particles. The dielectric constant of the composites was found to be higher at lower frequencies and decreased with increasing frequency, which can be attributed to various polarization mechanisms. The dielectric constant of polyester resin also increased gradually with the addition of 25 wt. % PWD filler content from 1.4 to 2.7 at 1 MHz frequency.

本文采用有限元法和实验分析方法研究了菠萝木粉（PWD）填充聚合物复合材料的介电和热特性。用不同重量（0-25 wt）的聚酯树脂增强PWD。%)和音量(0-17.95卷。%)百分比。导热性测试根据ASTM E-1530在Unitherm™2022模型中进行，而介电性能则借助HP LCR阻抗分析仪和HP 16451B介电测试仪进行测试。实验结果表明，加入17.95 vol后，聚酯树脂的导热系数由0.342降至0.245 W/m-K。% PWD，确保了增强的隔热性能。此外，利用Digimat软件模拟的有限元分析所得的导热系数值与实验值吻合较好，误差在1% ~ 10%之间。实验结果表明，随着PWD载荷的增加，导热系数值降低，从而保证了保温性能的增强。此外，利用Digimat软件模拟的有限元分析所得的导热系数值与实验值吻合较好。有限元分析还表明，加入PWD颗粒后，热流密度有所降低。复合材料的介电常数在频率较低时较高，随着频率的增加而降低，这可以归因于不同的极化机制。随着25 wt的加入，聚酯树脂的介电常数也逐渐增大。% PWD填料含量从1.4到2.7在1mhz频率。

{"title":"Dielectric and thermal behavior analysis of polyester composites filled with pineapple wood dust using finite element method","authors":"Bishnupriya Sahoo , Priyabrat Pradhan , Abhilash Purohit , Hemalata Jena , Bibhuti Bhusan Sahoo","doi":"10.1080/1023666X.2025.2496319","DOIUrl":"10.1080/1023666X.2025.2496319","url":null,"abstract":"<div><div>This study examines the dielectric and thermal characterization of pineapple wood dust (PWD)-filled polymer composites using the finite element method and experimental analysis. PWD was reinforced with polyester resin with different weight (0–25 wt. %) and volume (0–17.95 vol. %) percentages. Thermal conductivity tests were conducted as per the ASTM E-1530 in a Unitherm<sup>™</sup> 2022 model, whereas the dielectric properties were tested with the help of an HP LCR impedance analyzer and an HP 16451B dielectric tester. The experimental result showed a decrease in thermal conductivity values of polyester resin from 0.342 to 0.245 W/m-K with the inclusion of 17.95 vol. % PWD, which ensured enhanced thermal insulation. Further, the thermal conductivity values obtained from finite element analysis simulated using Digimat software were in good agreement with experimental values, and the error lies in between 1% and 10%. The experimental result showed a decrease in thermal conductivity values with increased PWD loading, which ensured enhanced thermal insulation. Further, the thermal conductivity values obtained from finite element analysis simulated using Digimat software were in good agreement with experimental values. The finite element analysis also revealed a decrease in heat flux density with the addition of PWD particles. The dielectric constant of the composites was found to be higher at lower frequencies and decreased with increasing frequency, which can be attributed to various polarization mechanisms. The dielectric constant of polyester resin also increased gradually with the addition of 25 wt. % PWD filler content from 1.4 to 2.7 at 1 MHz frequency.</div></div>","PeriodicalId":14236,"journal":{"name":"International Journal of Polymer Analysis and Characterization","volume":"30 6","pages":"Pages 666-674"},"PeriodicalIF":1.7,"publicationDate":"2025-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144653022","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Biofilm-resistant urethane-linked poly(methoxyethyl acrylate) copolymer films with enhanced durability and self-healing capabilities 生物膜抵抗聚氨酯连接聚（甲氧基乙基丙烯酸酯）共聚物膜增强耐久性和自愈能力

IF 1.7 4区工程技术 Q4 POLYMER SCIENCE

International Journal of Polymer Analysis and Characterization

Pub Date : 2025-08-18 Epub Date: 2025-06-06 DOI: 10.1080/1023666X.2025.2496301

Sana Ahmed , Jongho Jeon

2-Methoxyethyl acrylate draws significant interest for its exceptional biofilm-resistant properties, but its interaction with other monomers complicates outcome predictions during polymerization. To investigate these mechanisms, we synthesized biofilm-resistant prepolymers, HMEA and GMEA, using free radical polymerization (FRP). Gelation issues caused by the intramolecular crosslinking were mitigated by introducing styrene spacers, yielding a new set of additional prepolymers, HSMEA and GSMEA. Crosslinking with an aliphatic isocyanate (HDI) in the presence of a dibutyltin dilaurate (DTBDL) catalyst successfully formed urethane linkages, which were confirmed by attenuated total reflectance fourier transform infrared (FTIR) spectroscopy and differential scanning calorimetry (DSC) analysis. Overall, this crosslinking significantly reduced the exposed OH groups and enhanced the hydrophobicity of the polymers. Both cGMEA and cGSMEA displayed exceptional antibiofouling behavior as demonstrated by their resistance to bovine serum albumin (BSA). Mechanical tests demonstrated superior properties with tensile strengths of 4.1 MPa and 3.6 MPa and impressive elongation strains of 223% and 425%, respectively. This work reports one of its kind 2-Methoxyethyl acrylate-based polymer consisting of reversible urethane bonds providing self-healing capabilities and enhanced durability as a coating material. However, further investigation into the underlying mechanisms of these synergistic effects will be critical to fully harness the potential of methoxyethyl acrylate-based polymers.

2-甲氧基乙基丙烯酸酯因其特殊的生物膜抗性特性而引起了人们的极大兴趣，但它与其他单体的相互作用使聚合过程中的结果预测复杂化。为了研究这些机制，我们利用自由基聚合（FRP）合成了抗生物膜预聚物HMEA和GMEA。通过引入苯乙烯间隔剂，缓解了分子内交联引起的凝胶化问题，产生了一组新的预聚物，hsma和gsma。在双酸二丁基锡（DTBDL）催化剂的存在下，与脂肪族异氰酸酯（HDI）交联成功地形成了聚氨酯键，并通过衰减全反射傅立叶变换红外（FTIR）光谱和差示扫描量热（DSC）分析证实了这一点。总的来说，这种交联显著减少了暴露的OH基团，增强了聚合物的疏水性。cGMEA和cgsma均表现出对牛血清白蛋白（BSA）的抗性。力学试验表明，其抗拉强度分别为4.1 MPa和3.6 MPa，延伸率分别为223%和425%。本研究报告了一种基于2-甲氧基乙基丙烯酸酯的聚合物，该聚合物由可逆的聚氨酯键组成，具有自修复能力和增强的耐用性，可作为涂层材料。然而，进一步研究这些协同效应的潜在机制对于充分利用丙烯酸甲氧基乙酯基聚合物的潜力至关重要。

{"title":"Biofilm-resistant urethane-linked poly(methoxyethyl acrylate) copolymer films with enhanced durability and self-healing capabilities","authors":"Sana Ahmed , Jongho Jeon","doi":"10.1080/1023666X.2025.2496301","DOIUrl":"10.1080/1023666X.2025.2496301","url":null,"abstract":"<div><div><em>2-Methoxyethyl acrylate</em> draws significant interest for its exceptional biofilm-resistant properties, but its interaction with other monomers complicates outcome predictions during polymerization. To investigate these mechanisms, we synthesized biofilm-resistant prepolymers, HMEA and GMEA, using free radical polymerization (FRP). Gelation issues caused by the intramolecular crosslinking were mitigated by introducing styrene spacers, yielding a new set of additional prepolymers, HSMEA and GSMEA. Crosslinking with an aliphatic isocyanate (HDI) in the presence of a dibutyltin dilaurate (DTBDL) catalyst successfully formed urethane linkages, which were confirmed by attenuated total reflectance fourier transform infrared (FTIR) spectroscopy and differential scanning calorimetry (DSC) analysis. Overall, this crosslinking significantly reduced the exposed OH groups and enhanced the hydrophobicity of the polymers. Both cGMEA and cGSMEA displayed exceptional antibiofouling behavior as demonstrated by their resistance to bovine serum albumin (BSA). Mechanical tests demonstrated superior properties with tensile strengths of 4.1 MPa and 3.6 MPa and impressive elongation strains of 223% and 425%, respectively. This work reports one of its kind <em>2-Methoxyethyl acrylate</em>-based polymer consisting of reversible urethane bonds providing self-healing capabilities and enhanced durability as a coating material. However, further investigation into the underlying mechanisms of these synergistic effects will be critical to fully harness the potential of methoxyethyl acrylate-based polymers.</div></div>","PeriodicalId":14236,"journal":{"name":"International Journal of Polymer Analysis and Characterization","volume":"30 6","pages":"Pages 631-649"},"PeriodicalIF":1.7,"publicationDate":"2025-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144653652","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0