研究了在MPP/IPP共混体系中,MPP含量对MPP/IPP共混体系结晶性能、力学性能和耐热性能的影响,并通过SEM对其冲击力学性能变化原因进行了观测和分析,结果表明:在MPP/IPP不相容的共混体系中,MPP含量对共混体系刚度、拉伸强度、弯曲强度和维卡软化点的影响均呈现简单的线性规律;对缺口冲击强度的影响呈现抛物线形规律;在两相连续体系中,韧性好的相态为优势相时,断面呈现韧窝状形貌。 The effects of MPP content on the crystallization, mechanical and thermal properties of MPP / IPP blends were investigated in MPP / IPP blends. The causes of the impact mechanical properties were observed and analyzed by SEM. The results show that : MPP / IPP incompatible blend system, the MPP content of the blend system stiffness, tensile strength, flexural strength and Vicat softening point showed a simple linear law; impact on the notched Izod impact parabolic Shaped regularity. In the two-phase continuous system, when the tough phase is the dominant phase, the cross-section presents a dimple-like morphology.