采用型内二次发泡工艺制备了马来酸酐接枝聚丙烯(PP-g-MAH)共混改性短玻璃纤维(SGF)/聚丙烯(PP)泡沫复合材料,考察了PP-g-MAH的含量对复合材料的泡孔形貌、微观结构和力学性能的影响.结果表明:PP-g-MAH的引入改善了泡沫体的发泡效果,平均孔径减小了约35％,泡孔密度提高近4倍且分布均匀；偶联剂的表面包覆和PP-g-MAH的共同作用改善了SGF与PP的相容性,显著增强了两者的界面结合；随SGF含量增加,SGF/PP泡沫复合材料的抗弯强度先增大后减小,而冲击强度则呈现先急剧增加而后趋缓的变化趋势.
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