Correlation between microscopic degradation mechanism and macroscopic mechanical property of epoxy resin based on low molecular weight radiolysis products

Nuclear Analysis Pub Date : 2024-12-01 DOI:10.1016/j.nucana.2024.100143

Lei Yu , Shuai Chen , Jianming Zhou , Shuai Liu , Bo Liu , Jing Peng , Shuo Hou , Yinyong Ao

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Abstract

Low molecular weight radiolysis products play an important role in the performance change and degradation mechanism of polymer materials. In this study, the radiolysis products with low molecular weight of epoxy resin were detected, identified and quantified through solid phase microextraction combined with gas chromatography-mass spectrometry (SPME-GC-MS). The qualitative results showed that most of radiolysis products of epoxy resin were phenols and ketones. The result of principal component analysis showed that the composition of radiolysis products produced at different absorbed doses had obvious difference, indicating that the degradation degree of epoxy resin was different at different absorbed dose. Phenol can be used as an indicator product to reflect the change of tensile strengrh. It indicated that the identification of the radiolysis products was useful for studying the degradation mechanisms and predicting the degradation degree of epoxy resin. Accordingly, the radiation-induced degradation mechanisms were proposed according to the radiolysis products and theoretical calculations.

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基于低分子量辐射解产物的环氧树脂微观降解机理与宏观力学性能的关系

低分子量辐射解产物在高分子材料的性能变化和降解机理中起着重要作用。本研究采用固相微萃取-气相色谱-质谱联用技术（SPME-GC-MS）对低分子量环氧树脂的放射性溶解产物进行检测、鉴定和定量。定性结果表明，环氧树脂的辐射分解产物以酚类和酮类为主。主成分分析结果表明，不同吸收剂量下产生的放射性溶解产物组成有明显差异，说明不同吸收剂量下环氧树脂的降解程度不同。苯酚可作为反映抗拉强度变化的指标产品。结果表明，对放射性降解产物的鉴定有助于研究环氧树脂的降解机理和预测其降解程度。据此，根据辐射分解产物和理论计算，提出了辐射诱导降解机理。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Nuclear Analysis

CiteScore

1.70

自引率

0.00%

发文量