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.
出处
《中国有色金属学会会刊：英文版》
CSCD
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
关键词
环氧树脂
韧化
改性剂
接枝聚合物
长链尿素
epoxy resin
hyperbranched polymer
multiplexing frequency mode
toughening
chain-extended urea
