聚醚型聚氨酯/脲嵌段共聚物的合成、结构及性能的研究  

Synthesis and characterization of polyether poly(urethane-urea)block copolymer

作　　者：库斌[1] 高风[1] 朱杰[1] 周佑亮[1] 鲁琴[1] 黄世强[1] 

机构地区：[1]湖北大学功能材料绿色制备与应用教育部重点实验室,武汉430062

出　　处：《化工新型材料》2013年第4期129-132,共4页New Chemical Materials

摘　　要：采用二-(4-羟基丁基)聚二甲基硅氧烷(HB-PDMS)和双酚A(BPA)对聚氨酯进行改性,合成了6个系列的聚氨酯/脲嵌段共聚物,通过FT-IR、TG、DSC及吸水率研究了它们的结构及性能。研究表明,用HB-PDMS改性聚氨酯可以显著增强聚氨酯/脲的水解稳定性,其耐水性随HB-PDMS含量的增大而逐渐增强;用HB-PDMS及BPA合成的聚氨酯/脲,初始降解温度有所降低,但在不同程度上增强了其高温区的热稳定性。A series of polyurethane-urea block copolymer, dihydroxybutylpolydimethylsiloxane （HB-PDMS）as soft segments and bisphenol A （BPA）as hard segments, were synthesized. Structure and properties of polyurethane-urea were characterized by Fourier transforn infrared spectrometer （FTIR）, thermal gravimetric analysis（TG）, differential scanning calorimetry （DSC）and water absorption. The result showed that water resistance of polyurethane-urea was gradually increased with the increase of HB-PDMS content and thermal stability of polyurethane-urea based on BPA and HB-PDMS was enhanced in high temperature areas, although the initial degradation temperature was lower.

关 键 词：聚氨酯 脲 二-(4-羟基丁基)聚二甲基硅氧烷 双酚A 改性 

分 类 号：TQ323.8[化学工程—合成树脂塑料工业]