Influence of fillers and additives on the cure kinetics of an epoxy/anhydride resin
Influence of fillers and additives on the cure kinetics of an epoxy/anhydride resin
复制标题
DOI：
10.1016/j.eurpolymj.2007.01.025
复制
发表时间：
2007-04-01
影响因子：
6
通讯作者：
Holst, Marco
中科院分区：
文献类型：
--
作者：
Harsch, Margit;Karger-Kocsis, Jozsef;Holst, Marco
采用等温和非等温差示扫描量热法（DSC）研究了一种脂环族环氧树脂与酸酐固化剂的固化动力学。采用动态测量方法预测了环氧树脂的反应总热，并根据Kissinger和Ozawa的方法计算了环氧树脂的反应活化能。通过这些方法，证明了添加剂和填料对动力学的抑制和加速作用。用于深度加工和性能升级的添加剂以小于2wt.%加入，而基于SiO2的填料以大于50wt%的量掺入。为了描述转化率对时间和温度的依赖性，等温DSC数据被拟合到Kamal提出的自催化模型，并扩展了扩散因子。结果表明，在整个转换范围内非常好的协议。高填充系统也可以用唯象的Kamal模型很好地描述。(C)2007爱思唯尔有限公司版权所有。
The cure kinetics of a cycloaliphatic epoxy resin with and without additives and cured with an anhydride hardener was investigated by isothermal and nonisothermal differential scanning calorimetry (DSC). Dynamic measurements were used to predict the total heat of reaction of the epoxy resin as well as its activation energy based on the methods of Kissinger and Ozawa. With these methods the inhibition and acceleration effects of additives and fillers on the kinetics have been demonstrated. Additives for advanced processing and property upgrade were added in less than 2 wt.%, whereas fillers on base of SiO2 were incorporated in more than 50 wt.%. The effect of SiQ(2) surface treatment was also objective of this study.To describe the dependence of the conversion on time and temperature, isothermal DSC data were fitted to an autocatalytic model developed by Kamal and extended with a diffusion factor. The results show a very good agreement within the whole conversion range. Also the highly-filled system could be described very well by the phenomenological Kamal model. (C) 2007 Elsevier Ltd. All rights reserved.