聚丙烯酸酯增韧改性环氧树脂的研究  

Toughening midification of epoxy resins with P(MMA-BA-GMA)copolymer

作　　者：刘敬成 周琼 刘仁 张胜文 刘晓亚 

机构地区：[1]江南大学化学与材料工程学院,江苏无锡214122

出　　处：《热固性树脂》2009年第6期8-11,共4页Thermosetting Resin

基　　金：国家科技支撑计划(2007BAE15B02)

摘　　要：以丙烯酸正丁酯(BA)、甲基丙烯酸甲酯(MMA)及甲基丙烯酸缩水甘油酯(GMA)为单体通过悬浮聚合反应合成了共聚物P(MMA-BA-GMA)简称(PMBG),采用傅里叶红外光谱仪、核磁共振波谱仪、凝胶渗透色谱仪对PMBG的结构与组成进行了表征。采用合成的PMBG对环氧树脂(DER663)/固化剂(HTP-305)体系进行增韧改性,研究了PMBG含量对体系力学性能和热性能的影响,并通过扫描电镜(SEM)对固化物断面的微观结构进行了分析。结果表明:PMBG改性后的环氧树脂冲击强度及断裂伸长率提高,当PMBG的质量分数为5%时,冲击强度显著提高,增韧改性效果最好,并且对体系的玻璃化转变温度(Tg)影响不大;共聚物在体系固化时发生微相分离,因而提高了环氧树脂的韧性。P（ MMA- BA- GMA）（PMBG） was prepared by suspension polymerization using methyl methacrylate （MMA）, butyl acrylate（BA） and glycidyl methacrylate（GMA） as monomers. The structure and composition of PMBG were characterized by FFIR, I H NMR and GPC. The PMBG was used as toughening modifier for epoxy resin （ DER663 ）/curing agent HTP - 305 system. The effect of PMBG contents on the mechanical and thermal properties were invesigated. The section microstructure of the epoxy cured product was analyzed by SEM. The results showed that the impact strength and elongation at break of modified epoxy system were increased. The impact strength of the system with 5wt% PMBG was increased significantly and the toughening effect was the best. Adding PMBG had little effect on Tg. The microphase separation of PMBG occurred during epoxy curing, therfore the toughness of epoxy cured product was improved.

关 键 词：聚丙烯酸酯 悬浮聚合 环氧树脂 增韧改性 

分 类 号：TQ323.5[化学工程—合成树脂塑料工业]