环氧树脂改性聚氨酯体系非等温固化反应动力学  

Non-isothermal Curing Kinetics of Epoxy Resin Modified Polyurethane System

作　　者：崔向红[1] 刘晓东[1] 苏桂明[1] 李天智[1] 宋美慧[1] 张晓臣[1] CUI Xiang-hong;LIU Xiao-dong;SU Gui-ming;LI Tian-zhi;SONG Mei-hui;ZHANG Xiao-chen(Institute of Advanced Technology, Heilongjiang Academy of Sciences, Harbin 150020, China)

机构地区：[1]黑龙江省科学院高技术研究院

出　　处：《现代涂料与涂装》2019年第5期1-4,13,共5页Modern Paint & Finishing

摘　　要：选用二异氰酸酯和端羟基聚丁二烯(HTPB)为主要原料,制备了端异氰酸酯基聚氨酯(PU)预聚体,通过共混法制备了聚氨酯(PU)/环氧树脂(E51)互穿网络聚合物(IPN),通过非等温DSC法研究了 PU/E51与MOCA固化剂的固化反应动力学,采用Vyazovkin非线性等转化率方法(NLV)求得活化能Ea,平均值为65.58 kJ/mol;通过Malek法进行模型拟合动力学分析,并求得了 m、n、A值,得到动力学方程,同时进行了计算曲线与试验曲线拟合验证,拟合结果较好,符合Sestuk-Berggren(SB)模型。Polyurethane/epoxy resin interpenetrating polymer networks (PU/E51 -IPNs) were synthesized by blending terminal isocyanate polyurethane (PU) prepolymer prepared with diisocyanate and hydroxyl-terminated polybutadiene as the main materials. Curing kinetics of PU/E51 and MOCA curing agent was investigated by means if the non-isothermal DSC method. A mean activation energy Ea level of 65.58 kj/mol was calculated by non-linear Vyazovkin (NLV). The model fitting dynamics were analyzed by Malek method, the m, n, and A were obtained. The dynamics equation was obtained, and the calculated curve with the experimental curve fitting was verified, the fitting results were good, according with Sestak-Berggren (SB) model.

关 键 词：改性聚氨酯 非等温 Mdlek法 固化动力学 

分 类 号：TQ630[化学工程—精细化工]