摘要
利用丁二酸酐对端羟基超支化聚酯(AHBP)的端基进行改性,得到新的端羧基超支化聚酯(CHBP),并将其用于环氧树脂体系的增韧。研究了CHBP用量、羧基含量对环氧树脂/甲基四氢苯酐(EP/MeTHPA)固化体系的力学性能和热性能的影响。结果表明,改性后分子末端全部带羧基的CHBP的增韧作用最好,冲击强度可达18.5kJ/m2。CHBP质量分数为15%时,固化物的冲击强度可达18.2 kJ/m2,拉伸强度64.86 MPa,玻璃化温度(Tg)从100℃提高到106℃左右,可满足增韧环氧树脂的同时不降低其耐热性的要求。
Hydroxy- terminated hyperbranched polyester （AHBP） was modified by succinic anhydride to get carboxyl- terminated hyperbranched polyester（CHBP） and was used to toughen epoxy system. The effect of CHBP and carboxyl content on mechanical and thermal property of epoxy resin/methyl tetrahydrophthalic anhydride curing system was investiged. The best toughening effect could be obtained from modified CHBP with all carboxyl - terminated and the impact strength achieved 18.5 kJ/m^2. When the content of CHBP was 15%, the impact strength and tensile strength was 18.2 kJ/m^2 and 64.86 MPa respectively. The glass transition temperature of cured compound was increased from 100 ℃ to 106 ℃ which met the demand of toughening epoxy resin with out effect on thermal propertity.
出处
《热固性树脂》
CAS
CSCD
2008年第3期25-28,共4页
Thermosetting Resin
关键词
端羧基超支化聚酯(CHBP)
环氧树脂
增韧
热性能
carboxyl-terminated hyperbranched polyester（CHBP）
epoxy resin
toughening
thermal property
