针对聚丙烯与尼龙66应用广泛，存在连接需求，但两者极性差异大、相容性差而导致无法进行激光透射焊接这一问题，通过在聚丙烯的侧链上接枝马来酸酐来改善聚丙烯与尼龙66之间的焊接性能。介绍了接枝改性聚丙烯的制备配方和工艺，并测量了接枝改性聚丙烯的热学和力学性能。对接枝改性聚丙烯与尼龙66进行了激光透射焊接实验。实验发现：接枝改性聚丙烯与尼龙66具有很好的焊接性能。基于中心组合实验设计，利用响应面法建立了激光功率，扫描速度和夹紧力与焊接强度之间的数学模型，揭示了焊接工艺参数交互式影响规律，并得到了最佳工艺参数。

Polypropylene and nylon 66 are used widely and have the connecting needs, but they can not be welded by laser transmission welding because of polar differences and poor compatibility. Given this situation, maleic anhydride is grafted to the side chains of polypropylene to improve the welding performance between polypropylene and nylon 66. The preparation formulation and process of the graft modified polypropylene are introduced, and the mechanical and thermal properties of the graft modified polypropylene are tested. The graft modified polypropylene and nylon 66 are welded by laser transmission welding, which shows that the graft modified polypropylene and nylon 66 have good welding performance. Based on central composite experimental design, through response surface methodology, the mathematical model between laser power, welding speed, fixture pressure and the joint strength are established. At the same time, the interactive influence of welding process is revealed and the optimal process parameters are obtained.