改性楠竹纤维增强聚丙烯复合材料的制备及其性能

Preparation and Properties of Polypropylene Composites Reinforced by Modified Phyllostachys pubescens Fibers

摘要: 本论文采用以聚丙烯(PP)为基体，楠竹竹粉为增强材料，通过挤出和注塑成型的方法制备了复合材料。考察了改性前后竹粉的化学结构和竹纤维及复合材料断面的微观形貌，研究了偶联剂用量为竹粉含量的2%的不同竹粉含量的复合材料和竹粉含量为5%的不同偶联剂用量的竹塑复合材料的维卡软化点温度、熔体流动速率、冲击强度、拉伸强度，分析了竹粉含量和偶联剂含量对材料性能的影响。

Abstract: In this study, a series of bamboo plastic composites were prepared by extrusion and molding, in which polypropylene (PP) was used as the matrix and Phyllostachys pubescens fibers as the rein-forcing material. As well as the chemical structures of modified and unmodified bamboo fibers, the micro-morphology of bamboo fibers and composite brittle sections were investigated. Two kinds of materials, i.e., composites with different bamboo powder contents and containing coupling agent account for 2% of bamboo powder content, and plastic composites with 5 wt% bamboo powder and different coupling agent dosage, were studied. The effects of bamboo powder contents and coupling agent content on the properties of melt flow rate, Vicat softening point, impact strength and tensile strength were analyzed systematically.