PP-g-MAH改性SGF/PP泡沫复合材料的结构与力学性能研究

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材料工程 ›› 2012, Vol. 0 ›› Issue (11) : 57-60,65.

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工艺

PP-g-MAH改性SGF/PP泡沫复合材料的结构与力学性能研究

杨继年^1,2, 李子全²

作者信息 +

Investigation on the Cellular Structure and Mechanical Properties of SGF/PP Foam Composites Modified with PP-g-MAH

YANG Ji-nian^1,2, LI Zi-quan²

Author information +

文章历史 +

摘要

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。

Abstract

The short glass fiber (SGF)/polypropylene (PP) foam composites modified with maleic anhydride grafted PP (PP-g-MAH) were prepared via post-foaming process in designed dies. The influence of PP-g-MAH content on the cellular morphologies, microstructures and mechanical properties of composites were investigated. The results show that the outstanding improvement in foaming effect is realized by the addition of PP-g-MAH with a 35% reduction for average cell size and nearly four-fold increase in cell density. The compatibilities between SGF and PP are improved and their interfacial adhesion is enhanced significantly by the surface pretreatment of coupling agent as well as PP-g-MAH. The flexural strength of SGF/PP foam composites is increased first and then decreased. However, the impact strength exhibits the trend of rapid increasing and then moderating with the increase of PP-g-MAH.

导出引用

杨继年, 李子全. PP-g-MAH改性SGF/PP泡沫复合材料的结构与力学性能研究[J]. 材料工程, 2012, 0(11): 57-60,65

YANG Ji-nian, LI Zi-quan. Investigation on the Cellular Structure and Mechanical Properties of SGF/PP Foam Composites Modified with PP-g-MAH[J]. Journal of Materials Engineering, 2012, 0(11): 57-60,65

中图分类号： TQ328.3

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