PE-HD/BF/PE-g-MAH复合材料的力学性能和热性能  

Mechanical and Thermal Properties of PE-HD/BF/PE-g-MAH Composites

作　　者：周松[1] 祁永年 陈星容 孙文奎[1] 闫珂华 

机构地区：[1]西南石油大学材料科学与工程学院,四川成都610500

出　　处：《中国塑料》2016年第6期23-27,共5页China Plastics

基　　金：四川省高等学校油气田材料重点实验室资助项目(X151515KCL39)

摘　　要：采用10%(质量分数,下同)的NaOH碱溶液处理竹纤维(BF),用双螺杆挤出和注射成型的方法制备了高密度聚乙烯(PE-HD)/BF和PE-HD/BE/马来酸酐接枝聚乙烯(PE-g-MAH)复合材料,用扫描电子显微镜和热失重分析仪观察和表征了材料的形貌和热稳定性,测试了力学性能、流动性能和热变形温度。结果表明,碱处理可提高BF的热稳定性;碱处理的BF使PE-HD的刚性、弯曲强度和热变形温度提高,但导致拉伸强度、冲击韧性、熔体流动性和热稳定性下降;添加PE-g-MAH能改善BF与PE-HD基体之间的界面结合,添加5%PE-g-MAH可同时提高PE-HD/30%BF复合材料的拉伸、弯曲和冲击性能以及热稳定性和热变形温度,而且复合材料具有较好的流动性,可满足注射成型的要求。Bamboo fibers （BF） were treated with 10 wt% NaOH solution, and PE-HD/BF binary and PE-HD/BF/PE-g-MAH ternary composites were prepared by twin-screw extrusion and injection molding, and the composites were analyzed by SEM, TG, melt flow index, heat deflection temperature, and mechanical testing. The thermal stability of BF was found to be improved by alkali treatment. The stiffness, flexural strength, and heat deflection temperature of PE-HD were increased with the addition of alkali treated~ BF, however, the tensile strength, impact toughness, and melt flow index decreased. The interracial adhesion between PE-HD and BF could be enhanced by PE-g-MAH. With 5 wt% PE-g-MAH, the impact, tensile, and flexural properties, thermal stability and heat deflection temperature of PE-HD/30 wt% BF composites were well improved. The flowability of PE-HD/BF/PE-g-MAH composites was good enough to meet the requirement of injection molding.

关 键 词：高密度聚乙烯 竹纤维 马来酸酐接枝聚乙烯 力学性能 热性能 

分 类 号：TB332[一般工业技术—材料科学与工程]