【摘要】 用DSC分析了若干种软段对TDI基聚氨酯（PU）微相分离程度的影响，同时还测定了它们的力学性能。结果表明：微相分离程度顺序为HTPB－PU＞POP－PU＞PTMGPU，软段分子量大的较分子量小的微相分离程度大。对于POP－PU体系来说，由于PAS接枝共聚物的介入而影响了软、硬段的相分离程度，同时该体系也呈现出三相结构。更多还原

【Abstract】 Influences of the different soft segments on TDI-based polyurethane are investigated by DSC method,and the physical properties are also tested. The results show that the de-gree of microphase separation is HTPB-PU >PoP-PU> PTMG-PU, and the degree of microphase separation of higher molecular weight soft segment is better than that of lDwer one. The PAS graft copolymer has influence on POP-PU’s phase separatinn and the triphase system is observed’更多还原