A novel chain-extended urea containing hyperbranched polymer used as toughening modifier for epoxy resin  

作　　者：陆绍荣 韦春 杨小王 

机构地区：[1]Key Laboratory of Nonferrous Metal Materials and New Processing Technology Ministry of EducationGuilin University of Technology,Guilin 541004,China

出　　处：《中国有色金属学会会刊：英文版》2006年第B02期665-670,共6页Transactions of Nonferrous Metals Society of China

基　　金：Project (0447053) supported by the Natural Science Foundation of Guangxi Province, China Project(50473060) supported by the National Natural Science Foundation of China Project ([2004]20) supported by the Department of Education of Gunangxi Province, China

摘　　要：A new kind of reactive toughening accelerator for epoxy resin, amine-teminated hyperbranched polymer (H2O-NMe2) was synthesized and characterized by FT-IR spectroscopy. Dynamic mechanical analysis (DMA) was used to study the glass transition temperature (Tg), loss factor (tanδ) and activation energy (Ea) by using multiplexing frequency. The results show that the Ea at glassy relaxation process of modified system is about 70-80 kJ/mol higher than that of unmodified system, and the high modulus and good thermal properties are still maintained.A new kind of reactive toughening accelerator for epoxy resin, amine-teminated hyperbranched polymer （H2O-NMe2） was synthesized and characterized by FT-IR spectroscopy. Dynamic mechanical analysis （DMA） was used to study the glass transition temperature （Tg）, loss factor （tanδ） and activation energy （Ea） by using multiplexing frequency. The results show that the Ea at glassy relaxation process of modified system is about 70-80 kJ/mol higher than that of unmodified system, and the high modulus and good thermal properties are still maintained.

关 键 词：环氧树脂 韧化 改性剂 接枝聚合物 长链尿素 

分 类 号：TG156.5[金属学及工艺—热处理]