以热塑性聚氨酯弹性体(PUR–T)、聚氯乙烯(PVC)为主要原材料，通过熔融共混挤出制备PUR–T／PVC共混热塑性弹性体。讨论了PUR–T／PVC共混比、增塑剂用量、挤出共混温度、螺杆转速对共混弹性体性能的影响，利用万能试验机、扫描电子显微镜、转矩流变仪、旋转流变仪等研究了弹性体的加工性能及结构。结果表明，当PUR–T／PVC共混比为70／30，增塑剂邻苯二甲酸二辛酯用量为20份，挤出温度为160℃，螺杆转速为330 r／min时，弹性体材料的综合性能最佳；共混弹性体的表观黏度小于纯PUR–T，PVC含量在20%～50%时，PVC易形成网络结构。%PUR–T/PVC thermoplastic elastomer blends were prepared with PUR–T and PVC by melting blending. The effects of processing conditions and formula on blends mechanical properties,including the PUR–T/PVC weight ratio,plasticizer amount,extrusion temperature,and screw rotating speed were discussed. The process properties and structures of the blends were studied by universal testing machine,scanning electron microscope,torque rheometer,and rotor rheometer. Results showed that the best PUR–T/PVC ratio was 70/30,DOP amount was 20 portion,temperature was 160℃,and screw rotating speed was 330 r/min. The apparent viscosity of PUR–T/PVC blends was lower than that of PUR–T. With 20% – 50% PVC in the blend,PVC could form network structure.
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