摘要
环氧树脂/氧化铝复合体系的配方组成、理化特性及固化工艺对特高压大尺寸盆式绝缘子的质量有重大影响。为此应用非等温差示扫描量热(DSC)法,研究了不同固化剂含量的环氧树脂/氧化铝复合体系固化反应过程。随着固化剂含量增加,DSC曲线由双峰转变为单峰。所有试样前段固化的表观活化能(Ea)基本不变,低固化剂含量试样后段固化的Ea随固化剂含量增大显著减小。结果表明,固化催化反应控制在前段固化中占主导地位,而扩散控制和反应控制在后段固化中具有竞争作用。实际固化过程符合SB(m, n)模型,自催化反应在固化反应中起主导作用。
The formulation composition,physicochemical properties and curing process of the epoxy resin/alumina composites system remarkably affect the quality of UHV large-sized basin insulations.Consequently,we employed the non-isothermal differential scanning calorimetry method to study the curing reaction process of epoxy resin/alumina composites containing different curing agent contents.A two-peak curve of DSC would change to a single-peak curve as the content of the curing agent increased.The apparent activation energy(Ea)of pre-stage curing of all samples was essentially unchanged.The Ea of post-stage curing with low curing agent content would decrease significantly as the content of the curing agent increased.The results show that the curing catalytic reaction control dominates in the pre-stage curing process,while the diffusion control and the reaction control have competitive effects in the post-stage curing.The actual curing process accords with the SB(m,n)model,indicating that the autocatalytic reaction plays a leading role in the curing process.
作者
毕全瑞
郝留成
袁端鹏
张前程
徐佩
丁运生
BI Quanrui;HAO Liucheng;YUAN Duanpeng;ZHANG Qiancheng;XU Pei;DING Yunsheng(School of Chemistry and Chemical Engineering,Hefei University of Technology,Hefei230009,China;State Key Laboratory for Mechanical Behavior of Materials,School of Materials Science and Engineering,Xi’an Jiaotong University,Xi’an710078,China;Pinggao Group Co.,Ltd.,Pingdingshan467000,China)
出处
《高电压技术》
EI
CAS
CSCD
北大核心
2019年第9期2758-2765,共8页
High Voltage Engineering
基金
国家重点研发计划(2017YFB0903800)~~
关键词
环氧树脂
固化剂
氧化铝
固化动力学
反应控制
扩散控制
epoxy resin
curing agent
alumina
curing kinetics
reaction control
diffusion control
作者简介
毕全瑞,1995—,男,硕士生,研究方向为环氧树脂固化动力学,E-mail:Biquanrui@163.com;通讯作者:丁运生,1966—,男,博士,教授,博导,主要从事精细与功能高分子合成与应用、绿色高分子材料、高聚物结构与性能的研究工作,E-mail:dingys@hfut.edu.cn
