This study proposes using polypropylene grafted maleic anhydride (MA) to improve the interfacial compatibility between modified impact-resistant polypropylene (MPP) and thermoplastic polyurethane (TPU). The melt-compounding and injection method is used to prepare MPP/TPU/MA blends. The blending morphology, tensile behavior, flexural behavior, and impact behavior of blends are evaluated in terms of the content of TPU and MA. The SEM images show the positive influence of using MA on the compatibility between MPP and TPU, and only 1 wt% of it can efficiently decrease the difference in polarity and interfacial tension. As MA is an additional reinforcement, 100 wt% of the blends are made of MPP and TPU, indicating that more TPU means less MPP. When the blends are made of more TPU, the tensile strength of the control group (pure MPP/TPU blends) shows a decreasing trend. By contrast, MPP80/TPU20/MA3 blends have a tensile strength of 28 MPa and Young’s modulus of 927 MPa, while MPP90/TPU10/MA1 blends have the optimal flexural stress of 53.99 MPa and flexural modulus of 1493.61 MPa. Exception for MPP60/TPU40/MA1 blends, all the other experimental groups have greater impact strength as a result of using 1 wt% of MA. Specifically, MPP90/TPU10/MA1 blends have the maximum impact strength of 105.28 J/ m. The addition of MA has proven to efficiently improve the compatibility and interfacial adhesion between MPP and TPU, thereby forming an extraordinary bonding with a stabilized phase where a stress can be efficiently distributed. This study expects to design and adjust the performance of the composite blends according to the test results of SEM observation, tensile strength test, and impact strength test.

这项研究建议使用聚丙烯接枝的马来酸酐（MA）来改善改性抗冲击聚丙烯（MPP）和热塑性聚氨酯（TPU）之间的界面相容性。熔融混合和注射方法用于制备MPP / TPU / MA共混物。根据TPU和MA的含量评估共混物的共混形态，拉伸行为，挠曲行为和冲击行为。SEM图像显示了使用MA对MPP和TPU之间的相容性的积极影响，只有1wt％的MA可以有效地减小极性和界面张力的差异。由于MA是一种额外的增强剂，因此100％（重量）的共混物由MPP和TPU制成，表明更多的TPU意味着更少的MPP。当混合物由更多的TPU制成时，对照组（纯MPP / TPU混合物）的拉伸强度呈下降趋势。相比之下，MPP80 / TPU20 / MA3共混物的拉伸强度为28 MPa，杨氏模量为927 MPa，而MPP90 / TPU10 / MA1共混物的最佳弯曲应力为53.99 MPa，弯曲模量为1493.61 MPa。除MPP60 / TPU40 / MA1共混物外，所有其他实验组均由于使用1 wt％的MA而具有更高的冲击强度。具体而言，MPP90 / TPU10 / MA1共混物的最大冲击强度为105.28 J / m。业已证明，添加MA可以有效改善MPP和TPU之间的相容性和界面粘合性，从而与稳定相形成非凡的结合，从而可以有效分散应力。