通过流变学测量研究 PBAT/EVOH/GO 复合材料中强界面相互作用和链裂解的竞争关系

IF 2.3 3区材料科学 Q3 MATERIALS SCIENCE, COMPOSITES

Journal of Reinforced Plastics and Composites Pub Date : 2024-05-30 DOI:10.1177/07316844241256416

Mehdi Elhamnia, Parsa Dadashi, Ghodratollah Hashemi Motlagh

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引用次数: 0

摘要

通过熔融混合法制备了含有不同量氧化石墨烯（GO）的聚（丁烯-己二酸酯-对苯二甲酸酯）/聚（乙烯-乙烯醇）（PBAT/EVOH）共混物。通过形态学评估证实了 GO 在 PBAT 和界面中的定位。流变学测量和模型检验了 GO 在 PBAT 相降解和 PBAT/EVOH 界面改善方面的双重作用。结果表明，GO 所引起的界面相互作用的改善在 PBAT 降解效果中占主导地位。流变分析表明，源于 GO 的界面弹性主导了系统的总弹性，导致最终弹性增加。使用广义分数齐纳（GFZ）模型分析了聚合物共混物及其纳米复合材料的弹性，结果与实验结果拟合良好。此外，Lee-Park 模型还用于区分颗粒相互作用以及界面强化的影响，以及 GO 降解 PBAT 所导致的基体模量劣化。界面弹性的增加表明，GO 在界面上的强化作用克服了其降解作用。此外，应用 Coran 模型分析相均匀性时发现，界面相互作用随 GO 浓度的增加而线性增加。

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Investigating competition of strong interfacial interaction and chain scission in PBAT/EVOH/GO composite by rheological measurements

The blends of poly(butylene-adipate-co-terephthalate)/poly(ethylene-vinyl alcohol) (PBAT/EVOH) with varying amounts of graphene oxide (GO) were prepared by melt mixing. The localization of GO in PBAT and at the interface was confirmed by morphological evaluation. The dual effect of GO in degradation of PBAT phase and interface improvement of PBAT/EVOH was examined by rheological measurements and models. The results showed that the improved interfacial interaction induced by GO dominates its degradation effect in PBAT. Rheological analysis revealed that the interfacial elasticity originating from GO dominates the total elasticity of the system, resulting in an increase in the final elasticity. Generalized Fractional Zener (GFZ) model was used to analyze elasticity of the polymer blend and its nanocomposites with a well fit to the experimental results. Also, the Lee–Park model was used to distinguish the effects of particle interactions as well as interface strengthening from deterioration of matrix modulus due to PBAT degradation by GO. The increased elasticity of the interface showed that the strengthening effect of GO at the interface overcomes its degradation effect. Also, the application of Coran model to analyze phase homogeneity revealed a linear increase in interfacial interaction with GO concentration.

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来源期刊

Journal of Reinforced Plastics and Composites 工程技术-材料科学：复合

CiteScore

5.40

自引率

6.50%

发文量

审稿时长

1.3 months

期刊介绍： The Journal of Reinforced Plastics and Composites is a fully peer-reviewed international journal that publishes original research and review articles on a broad range of today''s reinforced plastics and composites including areas in: Constituent materials: matrix materials, reinforcements and coatings. Properties and performance: The results of testing, predictive models, and in-service evaluation of a wide range of materials are published, providing the reader with extensive properties data for reference. Analysis and design: Frequency reports on these subjects inform the reader of analytical techniques, design processes and the many design options available in materials composition. Processing and fabrication: There is increased interest among materials engineers in cost-effective processing. Applications: Reports on new materials R&D are often related to the service requirements of specific application areas, such as automotive, marine, construction and aviation. Reports on special topics are regularly included such as recycling, environmental effects, novel materials, computer-aided design, predictive modelling, and "smart" composite materials. "The articles in the Journal of Reinforced Plastics and Products are must reading for engineers in industry and for researchers working on leading edge problems" Professor Emeritus Stephen W Tsai National Sun Yat-sen University, Taiwan This journal is a member of the Committee on Publication Ethics (COPE).