International Journal of Polymer Analysis and Characterization最新文献

英文中文

Preparation of green, mechanically strong and degradable CNF/PVA/SA composite aerogel 制备绿色、机械强度高且可降解的 CNF/PVA/SA 复合气凝胶

IF 1.9 4区工程技术 Q4 POLYMER SCIENCE

International Journal of Polymer Analysis and Characterization

Pub Date : 2023-12-07 DOI: 10.1080/1023666x.2023.2283999

Lingyun Jia, Wenli Liu, Rong Fan, Wenxue Wang, Pengtao Liu

In this report, cellulose nanofiber-modified polyvinyl alcohol/sodium alginate (CNF/PVA/SA, CPS) composite aerogels were prepared by cyclic freezing and green cross-linking. The properties of aerog...

本报告采用循环冷冻和绿色交联法制备了纤维素纳米纤维改性聚乙烯醇/海藻酸钠（CNF/PVA/SA，CPS）复合气凝胶。气凝胶的性能与...

引用次数: 0

Mechanical and morphological investigation of laminated composite polymers depending on increasing vibration cycle 随着振动周期的增加，层合复合聚合物的力学和形态学研究

IF 1.9 4区工程技术 Q4 POLYMER SCIENCE

International Journal of Polymer Analysis and Characterization

Pub Date : 2023-11-27 DOI: 10.1080/1023666x.2023.2283996

Uğur Kemiklioğlu

Composite polymers are widely used in vibrating environments such as the aerospace, automotive, marine, and sports industries. Accordingly, composite materials are exposed to vibration at various p...

复合聚合物广泛应用于振动环境，如航空航天、汽车、船舶和体育产业。因此，复合材料在不同的p…

引用次数: 0

Methylene blue adsorption on vanadium pentoxide nanorods dispersed in starch-grafted polyacrylonitrile 淀粉接枝聚丙烯腈中分散的五氧化二钒纳米棒对亚甲基蓝的吸附

IF 1.9 4区工程技术 Q4 POLYMER SCIENCE

International Journal of Polymer Analysis and Characterization

Pub Date : 2023-11-20 DOI: 10.1080/1023666x.2023.2274661

Ahmed Kangmennaa, Henritta Yakubu, Agnes Tutuwaa, Charity Ohemaa Agyapong, Mandela Toku, Eric Selorm Agorku

A brand-new vanadium pentoxide (V2O5) functionalized starch (St) grafted poly(acrylonitrile) (PAN) adsorbent was synthesized via microwave-assisted graft polymerization method to remove methylene b...

采用微波辅助接枝聚合法制备了一种新型的五氧化二钒(V2O5)功能化淀粉(St)接枝聚丙烯腈(PAN)吸附剂。

引用次数: 0

Dual modification of natural rubber/halloysite nanotubes composites by silane and maleated natural rubber 硅烷和马来化天然橡胶对天然橡胶/埃洛石纳米管复合材料的双重改性

IF 1.9 4区工程技术 Q4 POLYMER SCIENCE

International Journal of Polymer Analysis and Characterization

Pub Date : 2023-11-16 DOI: 10.1080/1023666x.2023.2278234

Abdulhakim Masa, Nabil Hayeemasae

As the performance of natural rubber (NR) and halloysite nanotube (HNT) composites is uncertain due to low compatibility between the materials, malleated natural rubber (MNR) is then used as a comp...

由于天然橡胶(NR)和高岭土纳米管(HNT)复合材料之间的相容性较低，导致其性能不确定，因此采用malmalated天然橡胶(MNR)作为复合材料。

引用次数: 0

Assessment of thermal, crystalline and morphological properties of ellagic acid incorporated PVA, chitosan, PVA/chitosan and PVA/chitosan/gaur gum polymeric films 鞣花酸掺入聚乙烯醇、壳聚糖、聚乙烯醇/壳聚糖和聚乙烯醇/壳聚糖/白胶聚合物薄膜的热性能、结晶性能和形态性能评价

IF 1.7 4区工程技术 Q4 POLYMER SCIENCE

International Journal of Polymer Analysis and Characterization

Pub Date : 2023-10-03 DOI: 10.1080/1023666X.2023.2270803

Vinayak N. Vanjeri , Vishram D. Hiremani , Naganagouda Goudar , Oshin Jacintha D’souza , Jennifer P. Pinto , Anilkumar R Patil , Shivayogi S. Narasagoudr , Saraswati P. Masti , Ravindra B. Chougale

In the present study, the ellagic acid doped Polyvinyl alcohol (PVA), Chitosan (CS), PVA/CS and PVA/CS/Guar-gum blend films were prepared and coded as EA-1, EA-2, EA-3 and EA-4, respectively. The physicochemical properties of prepared films were analyzed by using different instrumental techniques. The differential scanning calorimetry (DSC) and Fourier transform infrared (FT-IR) results revealed the good interaction and miscibility among the components of the films. The thermal stability of ellagic acid incorporated PVA film (EA-1) shown more thermal stability in contrast with other films confirmed by thermogravimetric analysis (TGA) analysis. From the results of X-ray diffraction (XRD) study, the increased amorphous nature was observed for the EA-3 and EA-4 films. Surface morphology was analyzed by using scanning electron microscopy (SEM) and atomic force microscopy (AFM) which illustrates that prepared films exhibits smooth and homogeneous surface after blending with ellagic acid. The results obtained by measuring water contact angles (WCA) revealed that all the films have hydrophilic nature. All the prepared films have exhibited good mechanical properties, hence prepared films can act as promising material for food packaging application.

摘要本研究制备了鞣花酸掺杂聚乙烯醇(PVA)、壳聚糖(CS)、PVA/CS和PVA/CS/瓜尔胶共混膜，分别编码为EA-1、EA-2、EA-3和EA-4。采用不同的仪器技术对制备膜的理化性质进行了分析。差示扫描量热(DSC)和傅里叶变换红外(FT-IR)结果表明，膜组分之间具有良好的相互作用和互溶性。经热重分析(TGA)证实，鞣花酸掺入PVA膜(EA-1)的热稳定性优于其他膜。从x射线衍射(XRD)研究结果来看，EA-3和EA-4薄膜的非晶态性质有所增加。利用扫描电镜(SEM)和原子力显微镜(AFM)对制备的膜表面形貌进行了分析，结果表明，与鞣花酸共混后制备的膜表面光滑均匀。水接触角(WCA)测试结果表明，所有膜均具有亲水性。所制备的薄膜均表现出良好的力学性能，是一种很有前途的食品包装材料。作者感谢印度卡纳塔克大学(Dharwad, Karnatak University)大学科学仪器中心(USIC)、DST- saif和DST PURSE-二期计划提供的设施，以及Saraswati P Masti博士(st -塞族项目首席研究员)提供的设施。SB/EMEQ-213/2014，卡纳塔克大学化学系，卡纳塔克科学学院，Dharwad，卡纳塔克邦，印度，感谢他们对本研究的支持。所有作者都对研究的构思和设计做出了贡献。Vinayak N. Vanjeri、Vishram D. Hiremani、Naganagouda Goudar、Oshin D 'souza、Jennifer P. Pinto、Anilkumar R Patil、Shivayogi S. Narasagoudr、Saraswati P. Masti、Ravindra B. Chougale负责材料准备、数据收集和分析。手稿的初稿是由Vinayak Vanjeri撰写的，所有作者都对以前的手稿版本进行了评论。所有作者都阅读并批准了最终的手稿。披露声明作者未报告潜在的利益冲突。数据可用性声明本研究过程中产生或分析的所有数据均包含在本文中。作者声明在撰写本文期间没有收到任何资金、资助或其他支持。

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引用次数: 0

Fabrication of hydrolyzed keratin-modified rigid polyurethane foams and its thermal stability and combustion performance 水解角蛋白改性硬质聚氨酯泡沫的制备及其热稳定性和燃烧性能

IF 1.7 4区工程技术 Q4 POLYMER SCIENCE

International Journal of Polymer Analysis and Characterization

Pub Date : 2023-10-03 DOI: 10.1080/1023666X.2023.2270805

Xu Zhang , Simiao Sun , Dehe Yuan , Zhi Wang , Hua Xie , Yinhua Liu

Rigid polyurethane foams (RPUFs) were synthesized with hydrolyzed keratin using the “one-step method” of all-water foaming. Thermogravimetric analysis, pyrolysis kinetics analysis, cone calorimetry and smoke density (Ds) were used to investigate the effects of hydrolyzed keratin on thermal stability and combustion performance of RPUFs. The results showed that the modified RPUFs with 12.5 wt% hydrolyzed keratin (RPUF-HK5) had the lowest mass loss, the highest integrated program pyrolysis temperature, the highest activation energy, the lowest Ds (25.32 and 22.57), the highest light transmittance (64.30% and 67.46%), and total heat release (1.85 MJ/m², 2.18 MJ/m² and 2.92 MJ/m²), which indicated that RPUF-HK5 had better thermal stability and combustion performance. The current research results provided a useful reference for the preparation of the RPUFs with good thermal stability by bio-based modification.

摘要以角蛋白水解为原料，采用全水发泡“一步法”合成了硬质聚氨酯泡沫材料。采用热重分析、热解动力学分析、锥量热法和烟密度(Ds)研究了角蛋白水解对RPUFs热稳定性和燃烧性能的影响。结果表明，角蛋白水解率为12.5 wt%的改性RPUF-HK5具有最低的质量损失、最高的综合程序热解温度、最高的活化能、最低的Ds(25.32和22.57)、最高的透光率(64.30%和67.46%)和最高的总放热量(1.85 MJ/m2、2.18 MJ/m2和2.92 MJ/m2)，表明RPUF-HK5具有较好的热稳定性和燃烧性能。目前的研究结果为生物基改性制备热稳定性好的rpuf提供了有益的参考。关键字:聚氨酯泡沫水解角蛋白燃烧性能热稳定性披露声明我们声明，我们与其他个人或组织没有任何财务和个人关系，这些关系可能会不恰当地影响我们的工作，在任何产品、服务和/或公司中没有任何性质或种类的专业或其他个人利益，这些利益可能会被解释为影响文章中所呈现的立场或对文章的审查。数据可用性声明应作者要求提供的数据。支持本研究结果的数据可根据通讯作者的合理要求提供。经费:辽宁省教育厅科研基金资助项目[批准号:)JYT2020011)得到了极大的认可。

引用次数: 0

Development and application of gelatinized starches as wall materials for Lacticaseibacillus paracasei encapsulation 糊化淀粉作为副干酪乳杆菌包封壁材的开发与应用

IF 1.7 4区工程技术 Q4 POLYMER SCIENCE

International Journal of Polymer Analysis and Characterization

Pub Date : 2023-10-03 DOI: 10.1080/1023666X.2023.2278864

Zaira Esmeralda Cabrera-Canales , Carlos Alberto Gómez-Aldapa , Javier Castro-Rosas , Luis Díaz-Batalla , Ricardo Omar Navarro-Cortez , Netzahualcoyol Calcáneo Martínez , Reyna Nallely Falfán-Cortés

The physical modification of starches by extrusion leads to changes in their physicochemical properties due to the conditions of the process, such as high temperatures and shear stress. These properties allow extruded starches to have important applications that have been scarcely explored. Therefore, the aim of this research was to physically modify starches from varied botanical sources (rice, potato, and corn) through extrusion and evaluate their application as encapsulating materials for probiotics. The modified starches showed that extrusion promoted granule structural disorganization and gelatinization. This, in turn, reduced pasting and thermal properties, so starches were viable for microencapsulation via spray drying. All starches evaluated and modified were adequate wall materials for microencapsulation of high concentrations (>9 Log CFU/g) of Lacticaseibacillus paracasei, lactic acid bacteria with probiotic potential.

通过挤压对淀粉进行物理改性，由于加工过程的条件，如高温和剪切应力，导致淀粉的物理化学性质发生变化。这些prope…

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引用次数: 0

UV resistance and biodegradation of PLA-based polymeric blends doped with PBS, PBAT, TPS 掺PBS、PBAT、TPS的聚乳酸基共混物的抗紫外性和生物降解性

IF 1.9 4区工程技术 Q4 POLYMER SCIENCE

International Journal of Polymer Analysis and Characterization

Pub Date : 2023-08-24 DOI: 10.1080/1023666X.2023.2218696

Joanna Ludwiczak , Anna Dmitruk , Mateusz Skwarski , Paweł Kaczyński , Piotr Makuła

The design of new biodegradable polymers is important for solving the fossil resource and environmental pollution problems associated with conventional plastics. New PLA-based mixtures with the addition of PBAT, PBS and TPS, with different contents, were prepared to investigate their behavior after accelerated aging, as well as their potential for the biodegradation process. Their mechanical properties, mass, hardness, morphology, gloss and color change during UV irradiation progress, have been investigated. The samples were exposed to UV radiation for 21 d, their accelerated aging properties, were assessed weekly and compared with the non-aged samples. The degree of disintegration was determined after soil burial. The results showed that the mechanical properties, especially formability, as well as gloss and color, changed significantly after accelerated aging. All tested matrices are degradable, as shown by soil burial tests. Testing the stability of the functional properties of biodegradable plastics, which are assessed by end users, is important for the wider use of these plastics.

新型生物可降解聚合物的设计对于解决与传统塑料相关的化石资源和环境污染问题具有重要意义。制备了添加不同含量的PBAT、PBS和TPS的新型PLA基混合物，以研究它们在加速老化后的行为，以及它们在生物降解过程中的潜力。研究了它们的力学性能、质量、硬度、形态、光泽和在紫外线照射过程中的颜色变化。将样品暴露在紫外线辐射下21 d、它们的加速老化特性每周进行评估并与未老化的样品进行比较。土埋后测定崩解程度。结果表明，加速老化后，材料的力学性能，特别是成形性能，以及光泽和颜色都发生了显著变化。所有测试的基质都是可降解的，正如土壤掩埋测试所示。由最终用户评估可生物降解塑料功能特性的稳定性，对这些塑料的广泛使用至关重要。

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引用次数: 1

Thermal stability and dynamic mechanical analysis of nano-biofillers blended hybrid composites reinforced by cellulosic Borassus flabellifer L. fiber 纤维素牛油果纤维增强纳米生物填料混纺复合材料的热稳定性及动态力学分析

IF 1.7 4区工程技术 Q4 POLYMER SCIENCE

International Journal of Polymer Analysis and Characterization

Pub Date : 2023-08-18 DOI: 10.1080/1023666X.2023.2251792

Jitesh Kumar Singh , Arun Kumar Rout

The aim of this study is to investigate the dynamic mechanical and thermal stability behavior of rice husk nano-biofillers blend epoxy hybrid composites reinforced by Borassus flabellifer L. leaf fiber. The raw Borassus leaf fibers were treated with 5 wt.% NaOH solution to reduce the disadvantages of hydroxyl bonding. Rice husk nano-fillers (RHNFs) were blended with epoxy resin to modify them with 0.25, 0.45, and 0.65 wt.%, respectively, using sonication and mechanical stirring process. The prepared samples were assessed to evaluate the thermal stability, maximum degradation temperature, storage modulus (E′), loss modulus (E″), damping factor (tan δ) and Cole–Cole plot of the composites. EDX spectroscopy was used to confirm the elemental composition of nano-biofillers. The morphology of RHNFs was analyzed using a scanning electron microscope (SEM). The TG analysis confirmed that the 0.45 wt.% RHNFs blended Borassus leaf fiber (BLF) composites exhibited superior thermal stability (371–384 °C). Derivative thermogravimetry (DTG) analysis exposed that the maximum mass-loss degradation temperature of 0.45 wt.% RHNFs blend composites was 411 °C for the first stage and 678 °C for the second stage, which were more than raw and RHNFs blend (0.25 and 0.65 wt.%) composites. Accordingly, improved E′ (959.16–1637.75 MPa), glass transition temperature (T _g) from E″ (90.48–97.69 °C) and, T _g from tan δ (103.35–109.67 °C) were derived from the modified composites. Owing to the improved dispersion of the nano-filler, the 0.45 wt.% RHNFs blend composites had a homogeneous polymer system, as verified by the Cole–Cole diagram. The analyzed composites are to be used with versatile functionality for their intended purpose.

摘要:本文研究了稻壳纳米生物填料以牛蒡叶纤维增强环氧复合材料的动态力学和热稳定性。用5 wt处理牛油果生叶纤维。氢氧化钠溶液减少羟基成键的缺点。稻壳纳米填料(RHNFs)与环氧树脂共混，分别以0.25、0.45和0.65 wt对其进行改性。%，分别采用超声和机械搅拌工艺。对制备的样品进行热稳定性、最大降解温度、存储模量(E′)、损耗模量(E″)、阻尼系数(tan δ)和Cole-Cole图的评价。利用EDX光谱法确定了纳米生物填料的元素组成。用扫描电镜(SEM)分析了RHNFs的形貌。热重分析证实0.45 wt。% RHNFs混合硼砂叶纤维(BLF)复合材料表现出优异的热稳定性(371 ~ 384℃)。导数热重法(DTG)分析表明，最大失重降解温度为0.45 wt。RHNFs共混复合材料第一阶段温度为411°C，第二阶段温度为678°C，高于原料和RHNFs共混复合材料(0.25 wt.%和0.65 wt.%)。得到了改进后的E′(959.16 ~ 1637.75 MPa)、E″(90.48 ~ 97.69℃)的玻璃化转变温度(T g)和tan δ(103.35 ~ 109.67℃)的玻璃化转变温度(T g)。由于纳米填料分散性的改善，0.45 wt。通过Cole-Cole图验证了% RHNFs共混复合材料具有均匀的聚合物体系。所分析的复合材料将用于其预期用途的多功能。

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引用次数: 0

Eliciting impact of nano-clay reinforcement and processing schemes on polyurethane chain dynamics by gold sputtering patterns (GSPs) 利用金溅射模式(GSPs)研究纳米粘土增强和加工方案对聚氨酯链动力学的影响

IF 1.7 4区工程技术 Q4 POLYMER SCIENCE

International Journal of Polymer Analysis and Characterization

Pub Date : 2023-08-18 DOI: 10.1080/1023666X.2023.2255024

Mohammad Babar , Gaurav Verma

This article narrates how processing “bias” affects polymer chain dynamics due to variable 2D-nanofiller interfaces. Importance of this biasing can be assessed by the significant improvement in thermal and mechanical properties we have recently published for polyurethane-2D clay nanocomposite coatings. We intricately look at the nanoscale structure and subsequent interface formation between 2D clay and PU chains to understand the changes in morphology. Polyurethane (PU) chain dynamics was observed through the gold (Au) sputtered patterns in field emission electron microscopy (FESEM) images. These were fitted with circles and our findings confirm the presence of an attractive interface between PU and 2D nanoclay. Circle fitting elicits important data like the critical area (

A_{c}

) and critical relative frequency (

f_{c}

) which are used to evaluate the polymer chain dynamics and morphology. We find that

f_{c}

is related to circularity, and reinforcing nanoclay to the PU matrix enhances

f_{c}

by 4.6% and 6.9% with simultaneous use of ultrasonic bath and high shear homogenizer. This is further correlated with the already established methods of small angle X-Ray scattering (SAXS) and Fourier transform infrared (FTIR) spectroscopy to generate a fresh perspective on interfacial interactions in PU-2D clay nanocomposites.

摘要本文叙述了由于二维纳米填料界面的变化，加工“偏差”如何影响聚合物链动力学。这种偏倚的重要性可以通过我们最近发表的聚氨酯- 2d粘土纳米复合涂层在热性能和机械性能方面的显著改善来评估。我们错综复杂地观察了二维粘土和聚氨酯链之间的纳米级结构和随后的界面形成，以了解形态的变化。通过场发射电子显微镜(FESEM)图像中的金(Au)溅射模式观察了聚氨酯(PU)链动力学。我们的发现证实了PU和2D纳米粘土之间存在一个吸引界面。圆拟合得到的重要数据，如临界面积(Ac)和临界相对频率(fc)，用于评估聚合物链动力学和形态。研究发现，纤维纤维含量与圆度有关，在超声浴和高剪切均质机同时使用的情况下，纳米粘土对PU基体的增强可使纤维纤维含量提高4.6%和6.9%。这进一步与已经建立的小角x射线散射(SAXS)和傅里叶变换红外(FTIR)光谱方法相关联，以产生对PU-2D粘土纳米复合材料中界面相互作用的新视角。圆拟合处理聚氨酯(PU)纳米复合材料FESEM图像。与裸PU(上图)相比，可以清楚地观察到纳米粘土(下图)表面PU的金溅射模式(GSPs)的差异。采用3种工艺方案制备了wt% C30B-PU纳米复合涂层。FESEM图像显示了不同处理样品的金溅射图案。gsp的圆拟合分析有助于理解聚合物纳米填料界面。聚合物链在二维纳米填料内部和周围的生长构象为聚合物链动力学提供了新的视角。关键词:链迁移率聚合物构像吸引界面组织fesem相分离度(DPS)金溅射图案(GSPs)圆形致谢作者感谢科思特罗(印度)私人有限公司免费为我们提供必要的材料。披露声明作者未报告潜在的利益冲突。数据可得性声明支持本研究结果的数据可根据通讯作者的合理要求获得。我们感谢SAP (UGC，新德里)、PURSE (DST，新德里)和TEQIP-III对SSBUICET博士的贡献。我们感谢DST-UT (S&T&RE/RP/147/Sanc/09/2017/1123-1129)和DRDO (DMSDE Kanpur) (TR/0569/CARS-130，日期为2021年12月16日)提供的经济援助。我们收到了来自英国诺丁汉特伦特大学(NTU)的科技合作资助。

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