新型改性咪唑潜伏固化剂的制备及应用  

Preparation and application of a new modified imidazole latent curing agent

作　　者：方瑞娜[1,2] 姚新鼎 曹振祥[1] 李延勋 FANG Rui-na;YAO Xin-ding;CAO Zhen-xiang;LI Yan-xun(Yellow River Conservancy Technical Institute,Kaifeng 475004,China;Henan Engineering Technology Research Center of Green Coating Materials,Kaifeng 475004;Henan Institute cf Engineering,Zhengzhou 450007,China)

机构地区：[1]黄河水利职业技术学院,河南开封475004 [2]河南省绿色涂层材料工程技术研究中心,河南开封475004 [3]河南工程学院,河南郑州450007

出　　处：《热固性树脂》2021年第4期10-14,共5页Thermosetting Resin

基　　金：国家自然科学基金青年基金项目(51403053);河南省教育厅科学技术研究重点项目(20A530004);开封市科技攻关计划项目(1901021)。

摘　　要：以N-乙烯基咪唑、丙烯酸甲酯、丙烯酸乙酯为原料,N,N-二甲基甲酰胺(DMF)为溶剂使用可逆加成-断裂链转移技术(RAFT),通过自由基共聚制备了咪唑类潜伏型环氧树脂固化剂(VME)。对VME的分子结构进行了红外表征。将制备的VME与环氧树脂E51混合固化,研究了固化物(VME/E-51)的热分解性能及力学性能。结果表明:Flynn-Wall-Ozawa法、Kissinger法和Starink法求得的VME/E-51热分解表观活化能E较为相近。以Coast-Redfern法获得了VME/E-51的热分解动力学方程,并据该方程推测固化物的热分解过程为JMA过程。与N-乙烯基咪唑固化的E-51体系相比,VME/E-51体系具有优异的耐热性及力学性能。The imidazole-based latent epoxy resin curing agent(VME)was prepared by free radical copolymerization using N-vinylimidazole,methyl acrylate and ethyl acrylate as raw materials and N,N-dimethylformamide(DMF)as solvent,with the help of reversible addition-fragmentation chain transfer technology(RAFT).The molecular structure of VME was characterized by FT-IR.The prepared VME and epoxy resin E51 were mixed and cured,and the thermal decomposition and mechanical properties of the cured product(VME/E-51)were studied.The results showed that the apparent activation energy E of thermal decomposition of VME/E-51 obtained by Flynn-Walling Ozawa method,Kissinger method and Starink method were relatively similar.The thermal decomposition kinetic equation of VME/E-51 was obtained by the Coast-Redfern method,and the thermal decomposition process of the cured product was speculated to be the JMA process based on the equation.Compared with the E-51 system cured by N-vinylimidazole,the VME/E-51 system has excellent heat resistance and mechanical properties.

关 键 词：环氧树脂 固化剂 改性咪唑 丙烯酸树脂 

分 类 号：TQ323.5[化学工程—合成树脂塑料工业] TQ630.493