【摘要】 一类含硅亚苯结构的新有机硅预聚体车波王安锋周彩华傅辛福林思聪（南京大学高分子科学与工程系生物材料分子工程和控制释放分子工程室南京２１００９３）关键词有机硅预聚体，对硅亚苯硅氧烷，热稳定性，合成与表征，开环共聚从分子工程的角度看，以聚有机...更多还原

【Abstract】 A novel family of silicone prepolymers, α,ω bis( γ aminopropyl dimethyl ) poly tetramethyl p silphenylene siloxane was synthesized by ring opening copolymerization of octamethylcyclotetrasiloxane (D Me 4),dodecamethyl cyclotri p silphenylenesiloxane (D Phenylene 3),and 1,3 bis( γ aminopropyl) tetramethyldisiloxane (M NH 2 2) at temperature 160℃ with 95% yield.The prepolymers were characterized by gel permeation chromatography (GPC),vapor phase osmometer (VPO),infrared spectroscopy (IR),nuclear magnetic resonance (NMR),and thermogravimetric analyses (TGA).The results indicate that the prepolymer has the structure designed.When p silphenylene siloxane unit contents are over 20%,the temperatures for 20% weight loss in TGA curves are over 540℃,obout 70℃ higher than that of the dimethyl moiety.更多还原