A review on rheological approaches as a perfect tool to monitor thermal degradation of biodegradable polymers

IF 2.2 4区工程技术 Q2 MECHANICS Korea-Australia Rheology Journal Pub Date : 2024-10-21 DOI:10.1007/s13367-024-00111-3

Reza Salehiyan, Sanaz Soleymani Eil Bakhtiari

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Abstract

This review provides an in-depth analysis of the thermal degradation of biodegradable polymers through rheological methods. Focusing on key techniques such as time sweep tests, frequency sweep tests, and nonlinear rheological analyses gained at higher shear tests, the review highlights how these approaches offer critical insights into polymer stability and degradation kinetics. It entails an understanding of how molecular weight reduction, a common degradation mechanism, significantly impacts the performance of biodegradable polymers, and how the use of appropriate fillers can enhance thermal stability by mitigating chain scission. The review also discusses the application of the Arrhenius equation in modelling thermal degradation, helping predict degradation rates and optimize processing conditions. Time sweep tests are particularly emphasized for their ability to monitor polymer stability under various environmental conditions, while frequency sweep tests provide insights into the effects of processing/thermal history on material degradation. Tests at higher shear rates, which simulate real-world processing conditions such as extrusion and injection moulding, are explored for their role in understanding how processing-induced shear forces accelerate polymer degradation. Various biodegradable polymers are considered in this review, with polylactic acid (PLA) being the dominant polymer studied across most research, providing a clear picture of its degradation behaviour and strategies for enhancing its thermal stability. Therefore, it is expected that this review will be a comprehensive guide for researchers and engineers looking to optimize the thermal stability and performance of biodegradable polymers in various industrial applications.

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流变学方法是监测可生物降解聚合物热降解的理想工具

本文通过流变学方法对可生物降解聚合物的热降解进行了深入的分析。重点介绍了时间扫描测试、频率扫描测试和在高剪切测试中获得的非线性流变分析等关键技术，重点介绍了这些方法如何为聚合物稳定性和降解动力学提供关键见解。它需要理解分子量降低（一种常见的降解机制）如何显著影响生物可降解聚合物的性能，以及如何使用适当的填料通过减轻链断裂来提高热稳定性。综述还讨论了Arrhenius方程在热降解建模中的应用，有助于预测降解速率和优化加工条件。时间扫描测试因其在各种环境条件下监测聚合物稳定性的能力而受到特别强调，而频率扫描测试则可以深入了解加工/热历史对材料降解的影响。在更高剪切速率下的测试，模拟真实的加工条件，如挤压和注射成型，探索了它们在理解加工诱导的剪切力如何加速聚合物降解中的作用。本综述考虑了各种可生物降解聚合物，聚乳酸（PLA）是大多数研究中研究的主要聚合物，为其降解行为和提高其热稳定性的策略提供了清晰的图像。因此，这篇综述有望成为研究人员和工程师在各种工业应用中优化生物可降解聚合物的热稳定性和性能的综合指南。图形抽象

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来源期刊

Korea-Australia Rheology Journal 工程技术-高分子科学

CiteScore

2.80

自引率

0.00%

发文量

审稿时长

>12 weeks

期刊介绍： The Korea-Australia Rheology Journal is devoted to fundamental and applied research with immediate or potential value in rheology, covering the science of the deformation and flow of materials. Emphases are placed on experimental and numerical advances in the areas of complex fluids. The journal offers insight into characterization and understanding of technologically important materials with a wide range of practical applications.