含氟二元胺为扩链剂的聚氨酯弹性体的合成和表征  

Preparation and Characterization of Polyurethane Chain-Extended by Fluorine-Containing Diamine

作　　者：孔凡家[1] 杨晓慧[1] 姚洪喜[1] 王铭钧[1] 王丽 

机构地区：[1]上海交通大学化学化工学院,200240 [2]中船总公司船舶系统工程部,北京100036

出　　处：《聚氨酯工业》2008年第1期13-17,共5页Polyurethane Industry

摘　　要：以2,2-双(4-羟基苯基)六氟丙烷(全氟双酚A)为原料合成了2,2-双[4-(4-氨基苯氧基)苯基]六氟丙烷(BAPF6P),以此二元胺为扩链剂制备了一系列不同硬段含量的含氟聚氨酯弹性体(FPUE)。通过FTIR、TG、EA、WAXD、1H-NMR、DMA分析及拉伸试验,对BAPF6P和由其制备的FPUE的结构和性能进行了研究。结果表明,所得产物BAPF6P的结构与预期设计相符;由于FPUE的硬段间的强氢键作用和偶极效应,使得微区中部分链段排列有序形成微晶结构;随着硬段含量的提高,Tg逐渐升高,FPUE的耐寒性能逐渐降低,而耐热氧化性逐渐提高;FPUE的热分解温度在200℃以上,具有良好的耐热性能及优异的力学性能,BAPF6P是一个好的聚氨酯扩链剂。A diamine, 2,2-bis [ 4- （4-aminophenoxy） phenyl ] hexafluoropropane （ BAPF6 P）, was synthesized and characterized by FTIR, EA and 1^H-NMR. BAPF6P was used as chain extender to prepare a series of fluorine containing polyurethane elastomers （FPUEs） with different weight content of hard segments. The morphology and properties were measured through FFIR, WAXD, TG, DMA and stress-strain measurements. The results showed that the structure of BAPF6 P agreed with our expectation, and there was crystallility in the hard segment zone of FPUE, which was resulted from hydrogen bonding and dipole-dipole interaction. FPUE exhibited good heat-resistance and high mechanical properties. With the increasing of hard segments content, Tg increased while cold resistance decreased. BAPF6P was an excellent polyurethane chain-extender.

关 键 词：含氟二元胺 扩链剂 聚氨酯 力学性能 耐热性能 

分 类 号：TQ334.1[化学工程—橡胶工业]