目的 研究玻璃纤维(GF)对聚丙烯(PP)/六钛酸钾晶须(SPTW)复合材料力学性能的影响。方法 首先选用硅烷偶联剂KH550对六钛酸钾晶须进行改性，采用聚丙烯接枝马来酸酐(PP-g-MAH)作为相容剂，通过在PP/SPTW复合材料中引入不同质量分数的玻璃纤维(GF)，利用熔融共混法制得一系列PP/SPTW/GF复合材料。采用SEM观察冲击断面结构和XRD观察复合材料晶型结构，并比较引入不同质量分数的GF后PP/SPTW复合材料力学性能的变化。结果 当复合材料中GF质量分数为5%时，复合材料的弯曲强度、拉伸强度和冲击强度达到最佳，分别提升了18.38%，16.31%，20.24%；当复合材料中GF质量分数大于5%时，复材料的力学性能开始下降。结论 在复合材料中引入GF后，能够明显改善复合材料的力学性能，且随着GF质量分数的逐渐增加，复合材料的力学性能整体呈现出先上升后下降的趋势。

This work aims to study effects of glass fiber (GF) on mechanical properties of polypropylene (PP)/potassium hexatitanate whisker (SPTW) composites. The potassium hexatitanate whisker (SPTW) was modified by silane coupling agent KH550. The grafted maleic anhydride (PP-g-MAH) was used as the compatibilizer, and different percentage of GF was added in PP/SPTW to prepare PP/SPTW/GF composites by melt-blending method. The impact cross section structure was observed by SEM and the crystalline structure of PP composites was observed by XRD. Mechanical properties of PP/SPTW composites were investigated by comparing the effects of different percentages of GF with mechanical properties of PP/ SPTW composites. When the content of GF was 5%, the flexural strength, tensile strength and impact strength of the composites were the best and increased by 18.38%, 16.31% and 20.24%, respectively. The flexural strength of the composites began to decrease with the in-crease of the mass percentage of GF when the mass percentage of GF was more than 5%. GF can improve the mechanical properties of composites. With the increase of the content of GF, the mechanical properties of the composites increase and then decrease.