新型水分散有机硅-聚氨酯共聚物的结构与性能  

Sturcture and Properties of New Aqueous Dispersion Polysiloxane-Polyuretane Copolymers

作　　者：戴家兵[1] 张兴元[1] 李维虎[1] 葛震[1] 冯林林[1] 许戈文[2] 

机构地区：[1]中国科学技术大学高分子科学与工程系,安徽合肥230026 [2]安徽大学化学化工学院,安徽合肥230039

出　　处：《高分子材料科学与工程》2007年第3期122-125,共4页Polymer Materials Science & Engineering

基　　金：国家自然科学基金(50273035)资助项目

摘　　要：合成出含量为0%-12%的以二端羟丁基聚二甲基硅氧烷（DHPDMS）为部分软链段的新型水分散有机硅-聚氨酯共聚物（DHPDMS-PU）。NMR和FT-IR分析表明DHPDMS链段已被化学键入共聚物分子链中。比较透射和全反射衰减红外光谱发现,在含硅氧烷软链段的试样中,硅氧烷在成膜过程中逐渐向膜表面扩散,从而使材料具有较好的表面性能。随DHPDMS含量升高,DHPDMS-PU膜的水接触角增大,表面能减小;当DHPDMS含量超过7%时接触角渐趋于恒定。由分峰拟合发现氢键化的N-H含量随DHPDMS的增加而降低。A series of new aqueous dispersion polysiloxane-polyurethane （DHPDMS-PU） copolymers using dihydroxybutyl-terminated polydimethysiloxane （DHPDMS） as the part of soft segment were synthesized. Analysis of FT-IR and NMR shows that DHPDMS has been incorporated into the copolymer chains. It is found that siloxane segment transferred to the film surface, introduced the increase of siloxane content and brought the good surface property by comparing the transmitted FT-IR with ATR spectra. With increasing the content of DHPDMS, the water contact angle of DHPDMS-PU film increases while the surface free energy decreases. When the content of DHPDMS is over 7%, the contact angle tends to a constant gradually. The results also indicate that the content of hydrogen bonded N-H decreases with the increase of DHPDMS.

关 键 词：二端羟丁基聚二甲基硅氧烷 水分散 有机硅-聚氨酯 接触角 氢键 

分 类 号：TQ323.8[化学工程—合成树脂塑料工业]