讨论了聚醚型聚氨酯 (PU) /磺化聚苯乙烯 (SPS)共混体系的相容性和力学性能。结果表明 ,PU/ SPS-9.83mol%共混体系中存在的离子 -离子等特殊相互作用 ,使组分间相容性明显增加 ,界面状况改善。 SPS含量小于 60mass% ,共混物的拉伸强度呈抵消效应 ;SPS含量大于 60 mass% ,则呈协同效应。离子 -离子相互作用的增强和组分间离子交联结构的形成 ,使共混物的拉伸强度出现极大值 ,但也导致了材料的脆性断裂。 The compatibility and mechanical properties of polyether polyurethane (PU) / sulfonated polystyrene (SPS) blends were discussed. The results showed that the special interaction between ions and ions existed in PU / SPS-9.83mol% blends, the compatibility between the components increased obviously, and the interfacial conditions improved. SPS content of less than 60mass%, the tensile strength of the blend was offsetting effect; SPS content of more than 60 mass%, showed a synergistic effect. The ionic-ionic interaction enhancement and the formation of ionic crosslinks between the components lead to the maximum tensile strength of the blends, but also result in the brittle fracture of the material.