文章采用多种硅烷偶联剂对空心玻璃微珠（HGB）进行改性，改善HGB与聚丙烯（PP）的界面相容性，并探究了改性HGB的最大添加量，同时引入低密度聚烯烃弹性体（POE）对PP进行增韧。结果表明：经过偶联剂改性后的HGB与PP相容性好，且提升了复合材料的热稳定性，其中以乙烯基三甲氧基硅烷（A-171）改性效果最佳。与未改性的PP/HGB复合材料相比，PP/A-171-HGB的拉伸强度和弯曲强度分别提升了4.02 MPa和9.28 MPa，密度下降至0.902 g/cm³。当添加10%的改性HGB和15%的POE时，可保证复合材料刚性和韧性的平衡，相比未改性的PP/HGB复合材料，其断裂伸长率提升了73.4%，且密度可降至0.864 g/cm³。

A variety of silane coupling agents were used to modify hollow glass beads (HGB) to improve the interface compatibility between HGB and polypropylene (PP), and the maximum addition amount of modified HGB was explored. At the same time, low density polyolefin elastomer (POE) was introduced to toughen PP. The results show that the HGB modified by coupling agents has good compatibility with PP and improves the thermal stability of the composites, among which vinyl trimethoxysilane (A-171) has the best modification effect. Compared with the unmodified PP/HGB composites, the tensile strength and bending strength of PP/A-171-HGB are increased by 4.02 MPa and 9.28 MPa, respectively, and the density decreases to 0.902 g/cm³. When 10% modified HGB and 15% POE are added, the balance of rigidity and toughness of the composite can be ensured. Compared with the unmodified PP/HGB composites, the elongation at break of the composite is increased by 73.4%, and the density decreases to 0.864 g/cm³.