为了研究微相分离型聚丙烯热塑性弹性（MS-PTPE）的加工性能，探讨聚丙烯（PP）分子量、橡塑比、两种橡胶比、引发剂用量及架桥剂用量对熔体流变性能的影响。结果表明：随着PP分子量的增加，MS-PTPE样品熔体流动速率（MFR）逐渐降低；随着橡胶含量的增加，MFR逐渐减小；两种橡胶总含量一定时，随着丁苯橡胶含量的增加，MFR逐渐减小；随着引发剂用量的增加，MS-PTPE样品的MFR逐渐减小，当引发剂用量为2.28份时，MFR又稍有增大；随着架桥剂用量的增大，样品的MFR逐渐变小；在本研究的剪切流动条件下，MS-PTPE样品熔体呈假塑性流体的流动规律；用η _a＝A＋kt方程表征MS-PTPE样品熔体的表观黏度（η _a）与剪切速率（ \dot{\gamma }）及温度（t）的关系更直观、真实。

In order to study the processing performance of microphase separated polypropylene thermoplastic elastomer (MS-PTPE), the paper mainly investigates and explores the effects of polypropylene (PP) molecular weight, rubber plastic ratio, two rubber ratios, initiator and bridging agent dosage on the rheological properties of the melt. The results showed that the melt flow rate (MFR) of MS-PTPE samples gradually decreased with the increase of molecular weight of PP. As the rubber content increases, the melt mass-flow rate (MFR) gradually decreases. When the total content of the two types of rubber is constant, the MFR gradually decreases with the increase of butadiene styrene rubber content. As the amount of initiator increases, MFR rate of MS-PTPE samples gradually decreases. When the amount of initiator is 2.28 phr, MFR slightly increases. As the amount of bridging agent increases, the MFR of the sample gradually decreases. Under the shear flow conditions of this study, the melt of MS-PTPE sample exhibits a flow pattern of pseudo plastic fluid. The relationship between apparent viscosity (η _a) and shear rate ( \dot{\gamma }) and temperature (t) of MS-PTPE sample melt is more intuitive and realistic by the equation η _a＝A＋kt.