摘要
以端羟基聚丁二烯(HTPB)、聚四氢呋喃醚二醇(PTMEG)和2,4-甲苯二异氰酸酯(TDI-100)为原料,二甲硫基甲苯二胺(DADMT)为扩链剂,制得聚氨酯弹性体(PUE)。采用力学性能测试、差示扫描量热(DSC)、动态力学分析(DMA)及热重分析(TG)研究了HTPB/PTMEG比值、HTPB相对分子质量对PUE性能的影响。结果表明,HTPB(羟值0.836mmol/g)/PTMEG质量比为1∶4时,PUE力学性能最佳,拉伸强度30.3MPa,撕裂强度99.8kN/m;PU0(0.8)的tanδ峰位于-56.2℃,0℃以后,tanδ值低于0.08,说明丁羟型PUE比PTMEG型具有更好的动态性能,且HTPB分子量高,动态性能好;丁羟型PUE具有更高的热稳定性。
Polyurethan elastomer（PUE） was synthesized by hydroxy-terminated polybutadiene（HTPB） and polytetramethylene ether glycols（PTMEG）,2,4-toluene diisocyanate（TDI-100） and 2,4/2,6-diamino-3,5-dimethylthiotoluene（DADMT） as extender.The mechanical properties and structure of PUE were characterized,by DSC,DMA and TG,and the effects of ratio of HTPB/PTMEG and average molecular weight of HTPB on the PUE were investigated.The results show that the mechanical properties of PUE are up to a good level（tensile strength is 30.3MPa,tear strength is 99.8kN/m）when the mass ratio of HTPB and PTMEG is 1∶4.On the tanδ-T curve of PU0（0.8）,the tanδ peak is located at-56.2 ℃,and tanδ values is lower than 0.08 above 0 ℃.This show that the dynamic performance of HTPB-based PUE is better than of PTMEG-based.And HTPB-based PUE has a higher thermal stability
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
2012年第9期57-60,共4页
Polymer Materials Science & Engineering
