采用POE对聚丙烯（PP）进行改性，来改善汽车内饰PP材料表面的油漆附着力。通过差示扫描量热、扫描电子显微镜、达因笔、油漆百格测试和力学性能检测等手段，探究POE对改性PP结晶性能、分散能力、表面张力、油漆附着力和力学性能的影响。结果表明：改性PP中随着POE的增加，其刚性拉伸屈服强度和弯曲模量降低，韧性缺口冲击强度增加，且POE熔体流动速率（MFR）越高，其刚性降低的幅度越大。POE含量越高越有利于改性PP样板的表面附着力的提升，POE含量不低于15%时，样板百格测试等级达到0级。同时，POE的MFR越高越有利于橡胶相在样板表面的取向和分散，从而有利于油漆浸入，提升油漆附着力。喷涂内饰漆膜厚度低于26 μm时，样品表面难以形成有效致密的一层漆膜，导致样品的油漆附着力变差，漆膜厚度不低于26 μm时，其样板油漆附着力较好。

POE was used to modify polypropylene (PP) to improve paint adhesion on the surface of PP material for automotive interior. By means of differential scanning calorimetry, scanning electron microscope, Dyne pen, Paints Cross-cut test and mechanical property test, the effects of POE on crystallization property, dispersion ability, surface tension, paint adhesion and mechanical properties of modified PP were investigated. The results show that with the increase of POE, the tensile yield strength and bending modulus of modified PP decrease, and the notch impact strength increases. The higher melt flow rate (MFR) of POE, the greater the reduction of rigidity. The higher the content of POE, the more favorable it is to improve the surface adhesion of modified PP. When the POE content is not less than 15%, the Paints Cross-cut test level of the template reaches 0. The higher the MFR of POE, the more conducive to the orientation and dispersion of the rubber phase on the surface of the template, which is conducive to the immersion of the paint and the improvement of the paint adhesion. When the paint film thickness is less than 26 μm, it is difficult to form an effective and dense paint film on the surface of the template, resulting in poor paint adhesion of the template. When the paint film thickness is not less than 26 μm, the template paint adhesion is better.