Synthesis and characterization of epoxy resin composites modified by reactive polyimide containing hydroxyl groups

IF 1.8 4区化学 Q3 POLYMER SCIENCE

High Performance Polymers Pub Date : 2023-08-10 DOI:10.1177/09540083231184559

Gang Xu, Liyun Tan, Y. Nie, Xingzhong Fang, Guofei Chen

引用次数: 0

Abstract

Reactive polyimide (PI) containing phenolic hydroxyl groups was prepared by the polymerization of 2,2-bis(3-amino-4-hydroxyphenyl) hexafluoropropane and mixed thiodiphthalic anhydride. A series of epoxy resin composites were obtained by adding reactive PI to N,N,N′,N′-tetraglycidyl-4,4′-diamino-diphenylmethane (TGDDM) epoxy resin in different proportions. The effect of PI content on curing behavior, thermal properties, and mechanical properties was carefully investigated. Even a small amount of PI addition improved the mechanical properties and heat resistance of the epoxy resin, particularly the fracture toughness. Among them, epoxy resin composites EP-PI-1.5 with the addition of 1.5 wt% PI showed the best mechanical properties, whose impact strength, fracture toughness, and tensile strength were increased by 114%, 59%, and 34%, respectively. The phase morphology was also investigated to illustrate the fracture mechanism by scanning electron microscope (SEM) characterization.

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含羟基反应性聚酰亚胺改性环氧树脂复合材料的合成与表征

以2，2-双（3-氨基-4-羟基苯基）六氟丙烷和混合硫代双邻苯二甲酸酐为原料，合成了含酚羟基的反应性聚酰亚胺（PI）。在N，N，N′，N′-四缩水甘油基-4，4′-二氨基二苯基甲烷（TGDDM）环氧树脂中加入不同比例的反应性PI，制备了一系列环氧树脂复合材料。仔细研究了PI含量对固化行为、热性能和力学性能的影响。即使少量添加PI也能提高环氧树脂的机械性能和耐热性，尤其是断裂韧性。其中，添加1.5wt%PI的环氧树脂复合材料EP-PI-1.5表现出最佳的力学性能，其冲击强度、断裂韧性和拉伸强度分别提高了114%、59%和34%。还通过扫描电子显微镜（SEM）表征对相形态进行了研究，以说明断裂机理。

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

High Performance Polymers 化学-高分子科学

CiteScore

4.20

自引率

14.30%

发文量

106

审稿时长

1.2 months

期刊介绍： Health Services Management Research (HSMR) is an authoritative international peer-reviewed journal which publishes theoretically and empirically rigorous research on questions of enduring interest to health-care organizations and systems throughout the world. Examining the real issues confronting health services management, it provides an independent view and cutting edge evidence-based research to guide policy-making and management decision-making. HSMR aims to be a forum serving an international community of academics and researchers on the one hand and healthcare managers, executives, policymakers and clinicians and all health professionals on the other. HSMR wants to make a substantial contribution to both research and managerial practice, with particular emphasis placed on publishing studies which offer actionable findings and on promoting knowledge mobilisation toward theoretical advances. All papers are expected to be of interest and relevance to an international audience. HSMR aims at enhance communication between academics and practitioners concerned with developing, implementing, and analysing health management issues, reforms and innovations primarily in European health systems and in all countries with developed health systems. Papers can report research undertaken in a single country, but they need to locate and explain their findings in an international context, and in international literature.