【摘要】 为提高环氧树脂的性能,采用含氟硅聚氨酯预聚体（FSPUP）为改性剂对环氧树脂进行了改性研究。对1,3,5-三甲基-1,3,5-三（3,3,3-三氟丙基）环三硅氧烷（D₃F）进行开环聚合,合成了羟基氟硅油;使用3-（2-氨乙基）-氨丙基三甲氧基硅烷（SCA-603）对其封端,制得氨基氟硅油;再使用异佛尔酮二异氰酸酯（IPDI）、聚醚二醇和氨基氟硅油进行反应,制得异氰酸基团封端的含氟硅聚氨酯预聚物。以制备的聚氨酯预聚物与环氧树脂（E-51）合成改性环氧树脂（FSPUP/EP）,并用FT-IR表征,研究了FSPUF的加入量对改性环氧树脂体系力学性能的影响。通过动态热机械分析（DMA）研究了FSPUP/EP固化物的阻尼性能,用TG研究了FSPUP/EP的耐热性能。结果表明:随着FSPUP的加入,改性环氧树脂的力学性能、阻尼性能和耐热性能都获得了很大提高。更多还原

【Abstract】 In order to improve the performance of epoxy resin,the modification of epoxy resin by silicane and fluorine containing polyurethane prepolymer（FSPUP） is studied.1,3,5-Tris（（3,3,3-trifluoropropyl） methyl） cyclotrisiloxane（D₃F） is open loop polymerized to form hydroxyl fluorosilicone oil which is further end-capped with 3-（2-amino ethyl amino） propyl trimethoxysilane（SCA-603） to form amine-terminated fluorosilicone.Then isophorone diisocyanate（IPDI）,polyether glycols and amino fluorosilicone oil is reacted to obtain isoeyanate group-terminated silicane and fluorine containing polyurethane prepolymer,which is used to prepare modified epoxy resin（FSPUP/EP） with epoxy resin（E-51）.The structure of the modified epoxy resin is characterized via FT-IR.The effects of different contents of polyurethane on mechanical properties,damping properties and heat resistance of the modified epoxy resin system are studied.The results show that with the addition of the polyurethane prepolymer,the mechanical properties,damping properties and heat resistance of the modified epoxy resin are greatly improved.更多还原