There have been many reports on the use of maleic-anhydride-modified polypropylene (MAn-g-PP) as a compatibilizer for carbon fiber (CF)/polypropylene (PP) composites, but there are very few examples using carboxylic-acid-modified PP. The purpose of this paper is to investigate the effect of hydrogen bonding at the CF/PP interface contributed by the addition of carboxylic-acid-modified PP on the mechanical properties of composites, and to propose a new interface design for improving the mechanical properties of composites by combining a poly-2-vinyl-2-oxazoline (Pvozo) coating on the CF surface with the addition of carboxylic-acid-modified PP to composites. For this purpose, poly methacrylic acid-grafted polypropylene (PMAA-g-PP) was synthesized independently and added to the CF/PP composite. The addition of PMAA-g-PP enhanced the tensile properties of the composites due to the effect of hydrogen bonding at the CF/PP interface. The combination of PMAA-g-PP addition to the composites and the use of Pvozo-coated CF resulted in better interfacial adhesion and further improved the tensile properties of the composites. Increased entanglement with matrix PP molecules due to carboxylic-acid-modified PP being grafted onto the CF surface and different bonding modes at the CF/PP interface were suggested to contribute to the mechanical properties of the composite.

关于使用马来酸酐改性聚丙烯（MAn-g-PP）作为碳纤维（CF）/聚丙烯（PP）复合材料相容剂的报道很多，但使用羧酸改性的例子很少PP。本文的目的是研究羧酸改性PP的添加对CF/PP界面氢键对复合材料力学性能的影响，并提出一种新的界面设计来提高复合材料的力学性能。通过在CF表面上添加聚2-乙烯基-2-恶唑啉（Pvozo）涂层，并在复合材料中添加羧酸改性PP，可以制备出复合材料。为此，独立合成了聚甲基丙烯酸接枝聚丙烯（PMAA-g-PP）并将其添加到CF/PP复合材料中。由于CF/PP界面上的氢键作用，PMAA-g-PP的添加增强了复合材料的拉伸性能。在复合材料中添加 PMAA-g-PP 和使用 Pvozo 涂层 CF 相结合，可以实现更好的界面粘合力，并进一步提高复合材料的拉伸性能。由于将羧酸改性的 PP 接枝到 CF 表面上，以及 CF/PP 界面上不同的键合模式，增加了与基体 PP 分子的缠结，这有助于提高复合材料的机械性能。