Polymer Testing最新文献

Evaluation of the time–temperature superposition by comparing neat and glass-fibre-reinforced epoxy using dynamic mechanical thermal analysis

IF 5 2区材料科学 Q1 MATERIALS SCIENCE, CHARACTERIZATION & TESTING

Polymer Testing

Pub Date : 2025-03-18 DOI: 10.1016/j.polymertesting.2025.108747

Daniel Esse , Benedikt Scheuring , Frank Henning , Wilfried V. Liebig

Dynamic mechanical thermal analysis is a well-established method to determine the influence of temperature and frequencies on polymers. One challenge inherent to this method is the potential for significant changes in material properties, which can exceed several orders of magnitude and rapidly approach the accuracy or mechanical limits of measurement systems or actuators. In this work, it is shown that a change in the magnitude of the mechanical load within the linear elastic region does not affect the results. Consequently, the test parameters during the DMTA to be adapted to the stiffness of the specimens, allowing materials and volumes closer to the limits of the testing system to be measured. Furthermore, master curves were generated according to the temperature–time superposition for the frequency from the measured sections using a modified method. This was achieved by shifting the loss factor and applying the shift factor to the storage modulus. The tests presented in this work were carried out on continuous fibre-reinforced epoxy resin with a [

+ 45 / - 45

]_2s fibre orientation and the neat matrix material itself, up to temperatures above the glass transition area. Wicket plots indicated thereby that the temperature–time superposition is applicable for both material systems. A comparison of the two material systems showed, that the fibre-reinforced specimen is shifted horizontally to a greater extent.

动态机械热分析是一种确定温度和频率对聚合物影响的成熟方法。这种方法固有的一个挑战是材料特性可能发生重大变化，这种变化可能超过几个数量级，并迅速接近测量系统或执行器的精度或机械极限。本研究表明，线性弹性区域内机械负载大小的变化不会影响结果。因此，可以根据试样的刚度调整 DMTA 期间的测试参数，从而可以测量更接近测试系统极限的材料和体积。此外，根据温度-时间叠加法生成的频率主曲线是使用一种改进的方法从测量截面得出的。这是通过移动损耗因子并将移动因子应用于存储模量来实现的。这项工作中介绍的测试是针对纤维取向为 [+45/-45]2s 的连续纤维增强环氧树脂和纯基体材料本身进行的，测试温度高于玻璃化转变区。维氏图表明，温度-时间叠加法适用于这两种材料体系。两种材料体系的比较表明，纤维增强试样的水平移动程度更大。

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引用次数: 0

Experimental Investigation of the Vibration Behaviour of Variant GFRP Sandwich Panels in Thermal Environment

IF 5 2区材料科学 Q1 MATERIALS SCIENCE, CHARACTERIZATION & TESTING

Polymer Testing

Pub Date : 2025-03-17 DOI: 10.1016/j.polymertesting.2025.108764

Philipp Hüttich, Emil Heyden, Dieter Krause

In this study, the impact of temperature on the eigenfrequencies and amplifications of four variant GFRP sandwich panels with aramid honeycomb cores is investigated. Tests are carried out at temperatures from −40 °C to 120 °C, which are typical test conditions in the aerospace industry. The tests revealed that the eigenfrequencies of these panels are highly sensitive to temperature changes, with significant changes in vibration behaviour especially noted at temperatures below 0 °C. Furthermore, the study shows that not all resonances develop most at room temperature. The specific dynamic properties and resulting resonances of the individual plates only develop under conditions of changing temperature. This finding is crucial for certification in aerospace and optimising structural design, ensuring robust performance across different operating conditions while leveraging the lightweight potential of the materials. The results highlight the complex interaction between temperature and dynamic behaviour in aerospace materials, providing essential data and insights for designing, analysing, and optimising lightweight aerospace structures. The aim of this publication is to provide initial investigations into the mechanisms behind the temperature-dependent dynamic responses in order to improve the prediction of larger structural components. This can be used in future developments to improve the safety, reliability and efficiency of aerospace systems.

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引用次数: 0

A review of moisture absorption and corrosion resistance performance of FRTP in marine environments

IF 5 2区材料科学 Q1 MATERIALS SCIENCE, CHARACTERIZATION & TESTING

Polymer Testing

Pub Date : 2025-03-12 DOI: 10.1016/j.polymertesting.2025.108760

Jiang Lijuan , Wang Xin , Cheng Xiao , Zhou Yinzhi , Yi Yongzhan

Fiber reinforced thermoplastic (FRTP) composites have demonstrated significant potential in marine settings owing to their advantages of light weight, high performance, corrosion resistance and recyclability. However, the long-term performance in marine remains to be verified. This paper summaried the researches on water absorption and corrosion, which are the most significant issues that FRTP faced in marine. Moisture absorption of FRTP is affected by water absorption of each component, incomplete bonding interface, original defects, and so on. Corrosive ions penetrate into FRTP along with water molecules, causing varying degrees of corrosion to the resin, fibers, and interfaces. Both moisture absorption and corrosion significantly reduce the mechanical properties of FRTP. Long-term performance predictions are also introduced, both advantages and disadvantages are discussed. However, all the current predictions carry a degree of uncertainty. Future research should focus on improving preparation techniques and develop efficient prediction models.

纤维增强热塑性塑料（FRTP）复合材料具有重量轻、性能高、耐腐蚀和可回收等优点，因此在海洋环境中显示出巨大的潜力。然而，其在海洋中的长期性能仍有待验证。本文总结了有关 FRTP 在海洋中面临的最主要问题--吸水和腐蚀的研究。FRTP 的吸湿性受各成分吸水性、粘接界面不完整、原始缺陷等因素的影响。腐蚀性离子与水分子一起渗入 FRTP，对树脂、纤维和界面造成不同程度的腐蚀。吸湿和腐蚀都会大大降低 FRTP 的机械性能。此外，还介绍了长期性能预测，并讨论了其优点和缺点。不过，目前所有的预测都存在一定程度的不确定性。未来的研究应侧重于改进制备技术和开发有效的预测模型。

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引用次数: 0

Characterization of thermal, chemical, mechanical, and fatigue behavior of 3D printed ABS-based elastomeric blends: ABS/EVA and ABS/TPU

IF 5 2区材料科学 Q1 MATERIALS SCIENCE, CHARACTERIZATION & TESTING

Polymer Testing

Pub Date : 2025-03-10 DOI: 10.1016/j.polymertesting.2025.108763

Hamdi Kuleyin , Selahattin Budak , Ömer Barışkan Yasan , Recep Gümrük

The polymer blending method is widely used to obtain balanced mechanical properties and structural performance in many engineering applications. This study investigates the influence of Ethylene-Vinyl Acetate (EVA), and Thermoplastic Polyurethane (TPU) composition ratios on the thermal, chemical, viscoelastic, mechanical, and fatigue life behavior of Acrylonitrile-Butadiene-Styrene (ABS) based elastomeric blends. For this purpose, structural and mechanical properties of the blend material depending on their composition ratio were carried out through a series of characterization analyses, and tensile and fatigue tests. The findings indicated that ABS/EVA and ABS/TPU blends formed an immiscible structure. In addition, it was determined that the storage modulus of the blend with 10 % TPU improved because of the presence of new absorption peaks in the structure. The mechanical properties such as elastic modulus, yield strength, and ultimate tensile strength decreased concerning neat ABS with an increase in the EVA and TPU composition ratio for blend materials. However, the elongation to break was achieved approximately 6 times increasing with an increase in the TPU ratio for ABS/TPU blends. It was determined that the fatigue strength value in ABS/EVA and ABS/TPU blends decreased with the decrease in ABS composition ratio in the blend system. However, it was found that fatigue life improved by 25 % compared to ABS at low-stress amplitude for 10 % TPU additive. Finally, it can be revealed that the ABS-based elastomeric blends can be used to obtain desired properties according to their composition ratios for different applications.

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引用次数: 0

Coupling of fatigue crack growth and crack nucleation fatigue approach for non-crystallising rubber under fully relaxing uniaxial loading with multiaxial stress–strain state of 3D dumbbell test specimen

IF 5 2区材料科学 Q1 MATERIALS SCIENCE, CHARACTERIZATION & TESTING

Polymer Testing

Pub Date : 2025-03-10 DOI: 10.1016/j.polymertesting.2025.108752

Tadej Kocjan , Marko Nagode , Jernej Klemenc , Simon Oman

Coupling the two main approaches for characterizing the fatigue life of rubber materials, crack nucleation and crack growth approach, provides the opportunity to find a more universal approach to fatigue characterization since both approaches characterize the same intrinsic material property.

In this work, we have investigated the possibility of coupling the fatigue tests on planar tension, uniaxial and 3D dumbbell specimens. As is common in fatigue testing, the tests were performed at variable frequencies depending on the magnitude of the load and the limits of the testing machine. Fatigue test data for planar tension and 3D dumbbell specimens were taken from our previous works, whereas fatigue tests results on uniaxial specimens are presented herein.

First, the fatigue crack growth curve is converted into a crack nucleation fatigue life curve for room temperature and, in the next step, into an isothermal fatigue life curve for the 3D dumbbell specimens to check the applicability of the method. These represent a more complex three-dimensional geometry with a multiaxial stress–strain field that also exhibits considerable internal heat generation and could, in practice, be replaced with a product of arbitrary geometry. With an additional transformation, the room temperature isothermal fatigue curve can be used to estimate the fatigue life for any rubber product regardless of its geometry and loading condition/level.

The results presented herein show that the coupling provides a promising basis for the development of a universal method that opens the way to a faster and more versatile fatigue characterization of new rubber compounds.

{"title":"Coupling of fatigue crack growth and crack nucleation fatigue approach for non-crystallising rubber under fully relaxing uniaxial loading with multiaxial stress–strain state of 3D dumbbell test specimen","authors":"Tadej Kocjan , Marko Nagode , Jernej Klemenc , Simon Oman","doi":"10.1016/j.polymertesting.2025.108752","DOIUrl":"10.1016/j.polymertesting.2025.108752","url":null,"abstract":"<div><div>Coupling the two main approaches for characterizing the fatigue life of rubber materials, crack nucleation and crack growth approach, provides the opportunity to find a more universal approach to fatigue characterization since both approaches characterize the same intrinsic material property.</div><div>In this work, we have investigated the possibility of coupling the fatigue tests on planar tension, uniaxial and 3D dumbbell specimens. As is common in fatigue testing, the tests were performed at variable frequencies depending on the magnitude of the load and the limits of the testing machine. Fatigue test data for planar tension and 3D dumbbell specimens were taken from our previous works, whereas fatigue tests results on uniaxial specimens are presented herein.</div><div>First, the fatigue crack growth curve is converted into a crack nucleation fatigue life curve for room temperature and, in the next step, into an isothermal fatigue life curve for the 3D dumbbell specimens to check the applicability of the method. These represent a more complex three-dimensional geometry with a multiaxial stress–strain field that also exhibits considerable internal heat generation and could, in practice, be replaced with a product of arbitrary geometry. With an additional transformation, the room temperature isothermal fatigue curve can be used to estimate the fatigue life for any rubber product regardless of its geometry and loading condition/level.</div><div>The results presented herein show that the coupling provides a promising basis for the development of a universal method that opens the way to a faster and more versatile fatigue characterization of new rubber compounds.</div></div>","PeriodicalId":20628,"journal":{"name":"Polymer Testing","volume":"145 ","pages":"Article 108752"},"PeriodicalIF":5.0,"publicationDate":"2025-03-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143592151","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Macro-microscopic study on the damage threshold strain of particle-filled polymer composites

IF 5 2区材料科学 Q1 MATERIALS SCIENCE, CHARACTERIZATION & TESTING

Polymer Testing

Pub Date : 2025-03-10 DOI: 10.1016/j.polymertesting.2025.108762

Wang Jiaxiang, Qiang Hongfu, Wang Xueren, Wang Zhejun, Li Shiqi

During the loading process, particle-filled polymer composites will soften due to damage to their internal microstructure, resulting in a decrease in stiffness, toughness, and strength. This study proposes a damage threshold strain prediction model for typical particle filled polymer composites (composite solid propellants) based on the theory of particle inclusion micromechanics. Firstly, uniaxial tensile tests were conducted on three sizes of bone shaped hydroxyl terminated polybutadiene (HTPB) propellant specimens at different loading speeds, and the damage threshold strain during the tensile process was determined based on the stress-strain curve and pseudo strain calculation method; Then, micro computed tomography was applied to test and statistically analyze the size and morphology of the HTPB propellant filling particles. Based on the statistical results of filling particles, a mathematical model was constructed to predict the damage threshold strain of solid propellants during uniaxial loading using micromechanics methods and Weibull damage statistics theory. Subsequently, optimization algorithms were used to determine the parameter values in the model, and the effectiveness of the model was compared and verified. The parameters in the model were analyzed, and the influence of each parameter on the damage threshold strain was elucidated, laying the foundation for the quantitative design of the mechanical properties of propellants in the future. The results indicate that the established model can predict the damage threshold of HTPB propellants with different loading rates and specimen sizes at the specimen level, demonstrating the potential of macro-microscopic methods in analyzing damage in viscoelastic particle reinforced composite materials.

{"title":"Macro-microscopic study on the damage threshold strain of particle-filled polymer composites","authors":"Wang Jiaxiang, Qiang Hongfu, Wang Xueren, Wang Zhejun, Li Shiqi","doi":"10.1016/j.polymertesting.2025.108762","DOIUrl":"10.1016/j.polymertesting.2025.108762","url":null,"abstract":"<div><div>During the loading process, particle-filled polymer composites will soften due to damage to their internal microstructure, resulting in a decrease in stiffness, toughness, and strength. This study proposes a damage threshold strain prediction model for typical particle filled polymer composites (composite solid propellants) based on the theory of particle inclusion micromechanics. Firstly, uniaxial tensile tests were conducted on three sizes of bone shaped hydroxyl terminated polybutadiene (HTPB) propellant specimens at different loading speeds, and the damage threshold strain during the tensile process was determined based on the stress-strain curve and pseudo strain calculation method; Then, micro computed tomography was applied to test and statistically analyze the size and morphology of the HTPB propellant filling particles. Based on the statistical results of filling particles, a mathematical model was constructed to predict the damage threshold strain of solid propellants during uniaxial loading using micromechanics methods and Weibull damage statistics theory. Subsequently, optimization algorithms were used to determine the parameter values in the model, and the effectiveness of the model was compared and verified. The parameters in the model were analyzed, and the influence of each parameter on the damage threshold strain was elucidated, laying the foundation for the quantitative design of the mechanical properties of propellants in the future. The results indicate that the established model can predict the damage threshold of HTPB propellants with different loading rates and specimen sizes at the specimen level, demonstrating the potential of macro-microscopic methods in analyzing damage in viscoelastic particle reinforced composite materials.</div></div>","PeriodicalId":20628,"journal":{"name":"Polymer Testing","volume":"145 ","pages":"Article 108762"},"PeriodicalIF":5.0,"publicationDate":"2025-03-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143637413","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Exploring glass transition in polyethylene via molecular dynamics: From bulk to isolated chain

IF 5 2区材料科学 Q1 MATERIALS SCIENCE, CHARACTERIZATION & TESTING

Polymer Testing

Pub Date : 2025-03-07 DOI: 10.1016/j.polymertesting.2025.108758

Etienne Beaumont , Alexandre Fleury , Ali Noroozi , Guillaume Vignaud , Marc Meunier , Armand Soldera

In this study, we investigate the glass transition behavior of polyethylene (PE) chains in the bulk and isolated, using molecular dynamics (MD) simulations. Leveraging both simulated dilatometry, Arrhenius analysis, and a procedure based on the evolution of percentage of trans states, we identified three distinct regimes with different behaviors, proposing a glass transition domain delimited by glass transition temperatures (

T_{g}^{l}

and

T_{g}^{u}

delimiting the transition domain, and

T_{g}^{d}

extracted from dilatometry) for bulk polymers. The two latter methods were then used to characterize this domain for isolated chains, allowing us to compare with data stemming from the bulk polymer. Our findings reveal that T_gs of an isolated chain are generally lower than that of the bulk except for

T_{g}^{l}

which remains unchanged. This observation aligns with previous experimental and simulation studies. The study further investigates the dynamic and static flexibilities of the polymer, correlating the potential energy barriers associated with dihedral transitions to the observed

T_{g}^{l}

and

T_{g}^{u}

values. We propose that

T_{g}^{l}

is an intrinsic property of the polymer, as it depends on the potential energy barrier required to escape from the trans state. In contrast,

T_{g}^{u}

is influenced by more complex interactions and is lower for the isolated chain.

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引用次数: 0

Design and evaluation of modified gelatin films to address the aging problem of soft capsule shells

IF 5 2区材料科学 Q1 MATERIALS SCIENCE, CHARACTERIZATION & TESTING

Polymer Testing

Pub Date : 2025-03-07 DOI: 10.1016/j.polymertesting.2025.108759

Chungang Zhang , Chao Xie , Huimin Fu , Jiahui Li , Yang Wang , Minyuan Tian , Heng Hu

The objective of this experiment was to modify the structure of gelatin using succinic anhydride in order to address the issue of aging caused by the gelatin cross-linking reaction. The addition of succinic anhydride to the gelatin solution enabled the initiation of a chemical reaction, resulting in the formation of succinylated gelatin. The structure of the succinylated gelatin was characterized by Fourier transform infrared spectral analysis (FT-IR) and nuclear magnetic resonance spectroscopy (NMR). By comparing the disintegration time and mechanical properties of formaldehyde-treated gelatin, it was found that the disintegration time of formaldehyde-treated gelatin was much higher than that of acylated gelatin, and the change in mechanical properties was more pronounced. The stability and hygroscopicity of the two films before and after succinic anhydride modification were measured. The results of the moisture diffusion mechanism and scanning electron microscopy (SEM) analysis demonstrated that the moisture absorption capacity of the two films was essentially the same. The findings demonstrated that the alteration of the gelatin configuration through succinic anhydride incorporation exhibited a discernible anti-formaldehyde impact. Moreover, the hygroscopic ability of the two types of films was largely unchanged before and after the succinic anhydride modification, indicating that the modified gelatin had no significant impact on its hygroscopic property. In light of these findings, we postulate that the modification of gelatin with succinic anhydride may prove an effective strategy for achieving an anti-ageing effect.

{"title":"Design and evaluation of modified gelatin films to address the aging problem of soft capsule shells","authors":"Chungang Zhang , Chao Xie , Huimin Fu , Jiahui Li , Yang Wang , Minyuan Tian , Heng Hu","doi":"10.1016/j.polymertesting.2025.108759","DOIUrl":"10.1016/j.polymertesting.2025.108759","url":null,"abstract":"<div><div>The objective of this experiment was to modify the structure of gelatin using succinic anhydride in order to address the issue of aging caused by the gelatin cross-linking reaction. The addition of succinic anhydride to the gelatin solution enabled the initiation of a chemical reaction, resulting in the formation of succinylated gelatin. The structure of the succinylated gelatin was characterized by Fourier transform infrared spectral analysis (FT-IR) and nuclear magnetic resonance spectroscopy (NMR). By comparing the disintegration time and mechanical properties of formaldehyde-treated gelatin, it was found that the disintegration time of formaldehyde-treated gelatin was much higher than that of acylated gelatin, and the change in mechanical properties was more pronounced. The stability and hygroscopicity of the two films before and after succinic anhydride modification were measured. The results of the moisture diffusion mechanism and scanning electron microscopy (SEM) analysis demonstrated that the moisture absorption capacity of the two films was essentially the same. The findings demonstrated that the alteration of the gelatin configuration through succinic anhydride incorporation exhibited a discernible anti-formaldehyde impact. Moreover, the hygroscopic ability of the two types of films was largely unchanged before and after the succinic anhydride modification, indicating that the modified gelatin had no significant impact on its hygroscopic property. In light of these findings, we postulate that the modification of gelatin with succinic anhydride may prove an effective strategy for achieving an anti-ageing effect.</div></div>","PeriodicalId":20628,"journal":{"name":"Polymer Testing","volume":"145 ","pages":"Article 108759"},"PeriodicalIF":5.0,"publicationDate":"2025-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143632022","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Melt processable fluorinated Poly(aryl ether)s with low dielectric and good mechanical properties

IF 5 2区材料科学 Q1 MATERIALS SCIENCE, CHARACTERIZATION & TESTING

Polymer Testing

Pub Date : 2025-03-06 DOI: 10.1016/j.polymertesting.2025.108755

Chang Yu, Yang Wang, Bo Jiang, Yang Yang, Jinxuan Han, Haibo Zhang, Yingshuang Shang

The rapid development in high-frequency communication has raised the demand for intrinsic low dielectric materials. Fluorinated poly(aryl ether)s (FPAEs) have gained significant attention due to their excellent dielectric properties and heat resistance. However, current methods for preparing FPAE films involve organic solvents, which generate substantial waste during large-scale production. There is an urgent need for simpler and more efficient processing methods, such as injection molding or melt processing, to overcome the limitations of solvent-based approaches. In this study, FPAEs with different molecular weights were synthesized from decafluorobiphenyl (DFBP) and bisphenol AF. The melting index and rheological tests demonstrated that FPAEs exhibited good thermal stability and melt processing performance. Notably, the dielectric loss (D_f) of FPAEs prepared by melt processing was significantly reduced (below 0.001) while their dielectric constant (D_k), mechanical strength, and flexibility remained comparable to those of FPAEs produced using solution processing. This study advances the melt processing of FPAEs with perfluorinated biphenyl groups, providing insights for large-scale production of low dielectric materials and broadening their potential applications in high-frequency communication.

{"title":"Melt processable fluorinated Poly(aryl ether)s with low dielectric and good mechanical properties","authors":"Chang Yu, Yang Wang, Bo Jiang, Yang Yang, Jinxuan Han, Haibo Zhang, Yingshuang Shang","doi":"10.1016/j.polymertesting.2025.108755","DOIUrl":"10.1016/j.polymertesting.2025.108755","url":null,"abstract":"<div><div>The rapid development in high-frequency communication has raised the demand for intrinsic low dielectric materials. Fluorinated poly(aryl ether)s (FPAEs) have gained significant attention due to their excellent dielectric properties and heat resistance. However, current methods for preparing FPAE films involve organic solvents, which generate substantial waste during large-scale production. There is an urgent need for simpler and more efficient processing methods, such as injection molding or melt processing, to overcome the limitations of solvent-based approaches. In this study, FPAEs with different molecular weights were synthesized from decafluorobiphenyl (DFBP) and bisphenol AF. The melting index and rheological tests demonstrated that FPAEs exhibited good thermal stability and melt processing performance. Notably, the dielectric loss (D<sub>f</sub>) of FPAEs prepared by melt processing was significantly reduced (below 0.001) while their dielectric constant (D<sub>k</sub>), mechanical strength, and flexibility remained comparable to those of FPAEs produced using solution processing. This study advances the melt processing of FPAEs with perfluorinated biphenyl groups, providing insights for large-scale production of low dielectric materials and broadening their potential applications in high-frequency communication.</div></div>","PeriodicalId":20628,"journal":{"name":"Polymer Testing","volume":"145 ","pages":"Article 108755"},"PeriodicalIF":5.0,"publicationDate":"2025-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143601354","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Hydrolytic degradation of poly(lactic acid): Population balance modelling for simulating molecular weight distribution 聚乳酸的水解降解：模拟分子量分布的种群平衡模型

IF 5 2区材料科学 Q1 MATERIALS SCIENCE, CHARACTERIZATION & TESTING

Polymer Testing

Pub Date : 2025-03-06 DOI: 10.1016/j.polymertesting.2025.108756

Wanwarang Limsukon , Maria Rubino , Muhammad Rabnawaz , Loong-Tak Lim , Puttha Sakkaplangkul , Rafael Auras

Poly (lactic acid) (PLA) is one of the most promising biobased and biodegradable polymers able to replace several fossil-based plastics for packaging and other applications. However, PLA is susceptible to hydrolytic degradation, impacting its overall service performance and end-of-life. The molecular weight distribution (MWD) is a critical parameter that provides insights during hydrolytic degradation. In this study, we introduced a population balance model, utilizing the high-order moment-conserving method of classes, to describe the MWD during the hydrolytic degradation of amorphous PLA film at 45 °C and 65 °C and expanded to 85 °C. The phenomenological model provided hydrolysis constants that clarified noncatalytic and autocatalytic reaction mechanisms and information on specific chain scission of a particular length. Our predictions demonstrate a promising alignment in weight location and distribution shape with the experimental MWDs observed throughout the hydrolytic process of PLA. One notable advantage is the MWD simulation, conducted over an extended time frame. Furthermore, this predictive capability extends to forecasting the lifetime of PLA films at various temperatures within the tested range, thereby fostering insights into PLA hydrolysis applicable to real-life scenarios and supporting environmentally conscious degradation practices.

{"title":"Hydrolytic degradation of poly(lactic acid): Population balance modelling for simulating molecular weight distribution","authors":"Wanwarang Limsukon , Maria Rubino , Muhammad Rabnawaz , Loong-Tak Lim , Puttha Sakkaplangkul , Rafael Auras","doi":"10.1016/j.polymertesting.2025.108756","DOIUrl":"10.1016/j.polymertesting.2025.108756","url":null,"abstract":"<div><div>Poly (lactic acid) (PLA) is one of the most promising biobased and biodegradable polymers able to replace several fossil-based plastics for packaging and other applications. However, PLA is susceptible to hydrolytic degradation, impacting its overall service performance and end-of-life. The molecular weight distribution (MWD) is a critical parameter that provides insights during hydrolytic degradation. In this study, we introduced a population balance model, utilizing the high-order moment-conserving method of classes, to describe the MWD during the hydrolytic degradation of amorphous PLA film at 45 °C and 65 °C and expanded to 85 °C. The phenomenological model provided hydrolysis constants that clarified noncatalytic and autocatalytic reaction mechanisms and information on specific chain scission of a particular length. Our predictions demonstrate a promising alignment in weight location and distribution shape with the experimental MWDs observed throughout the hydrolytic process of PLA. One notable advantage is the MWD simulation, conducted over an extended time frame. Furthermore, this predictive capability extends to forecasting the lifetime of PLA films at various temperatures within the tested range, thereby fostering insights into PLA hydrolysis applicable to real-life scenarios and supporting environmentally conscious degradation practices.</div></div>","PeriodicalId":20628,"journal":{"name":"Polymer Testing","volume":"145 ","pages":"Article 108756"},"PeriodicalIF":5.0,"publicationDate":"2025-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143609786","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0