基于环氧-酰亚胺树脂的新系列曲美亚胺热重分析

IF 3.1 2区 化学 Q2 CHEMISTRY, ANALYTICAL
Ehsan Abbasi, Ali Jannesari
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引用次数: 0

摘要

与双酚 A 的二缩水甘油醚(DGEBA)和异氰尿酸三缩水甘油酯(TGIC)树脂相比,对一系列新的脂肪族、环脂族和芳香族环氧亚胺基三苯甲酰亚胺(EI)树脂进行了动态热重分析、在未固化和固化状态下,研究发现 EI 树脂/体系与 DGEBA 树脂/体系不同,具有多步骤热降解过程,其中两个主要步骤分别对应于 DGEBA 和亚胺分子的降解。评估等温固化温度(TCure)对其降解行为的影响后发现,一般来说,热降解过程的第一阶段受 TCure 的影响较大。此外,在 TCure 对系统稳定性和分解行为的影响中,环氧胺反应与醚化/均聚之间的竞争起着至关重要的作用。因此,在环脂族体系的热图中可以观察到最显著的变化,这是因为其树脂的熔化温度与 TCure 之间的差异最大。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Thermogravimetric Analysis of a New Series of Trimellitimide-Based Epoxy-Imide Resins

Thermogravimetric Analysis of a New Series of Trimellitimide-Based Epoxy-Imide Resins

The dynamic thermogravimetric analysis of a new series of aliphatic, cycloaliphatic, and aromatic trimellitimide-based epoxy-imide (EI) resins, compared to diglycidyl ether of bisphenol-A (DGEBA) and triglycidyl isocyanurate (TGIC) resins, in uncured and cured states, revealed that the EI resins/ systems, unlike DGEBA ones, have a multistep thermal degradation process with two chief steps corresponding to the degradation of the DGEBA and the imide moieties. Evaluating the influences of isothermal curing temperature (TCure) on their degradation behavior ascertained that, generally, the 1st stage of the thermal degradation processes is more affected by TCure. Furthermore, the competition between epoxide-amine reactions with etherification/ homopolymerization plays the most crucial role in the impact of TCure on the systems' stability and decomposition behavior. Therefore, the most considerable changes can be observed in the thermograms of the cycloaliphatic system due to the highest difference between the melting temperature of its resin and TCure.

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来源期刊
Thermochimica Acta
Thermochimica Acta 化学-分析化学
CiteScore
6.50
自引率
8.60%
发文量
210
审稿时长
40 days
期刊介绍: Thermochimica Acta publishes original research contributions covering all aspects of thermoanalytical and calorimetric methods and their application to experimental chemistry, physics, biology and engineering. The journal aims to span the whole range from fundamental research to practical application. The journal focuses on the research that advances physical and analytical science of thermal phenomena. Therefore, the manuscripts are expected to provide important insights into the thermal phenomena studied or to propose significant improvements of analytical or computational techniques employed in thermal studies. Manuscripts that report the results of routine thermal measurements are not suitable for publication in Thermochimica Acta. The journal particularly welcomes papers from newly emerging areas as well as from the traditional strength areas: - New and improved instrumentation and methods - Thermal properties and behavior of materials - Kinetics of thermally stimulated processes
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