玄武岩纤维增强高密度聚乙烯复合材料的制备与性能研究
Basalt Fiber-Reinforced High-Density Polyethylene Composites:Preparation and Properties
闵建新 1龙春光 1周卓1
作者信息
- 1. 长沙理工大学汽车与机械工程学院,湖南 长沙 410004
- 折叠
摘要
以高密度聚乙烯(HDPE)为基体、玄武岩纤维(BF)为增强材料,通过熔融共混、注塑成型制备了 HDPE/BF复合材料,对比研究了未改性和硅烷偶联剂KH550 改性对复合材料性能的影响,探究了不同BF含量对复合材料的热稳定性、导热性、加工流动性和力学性能的影响.结果表明:改性BF表面存在KH550 分子,含改性BF的复合材料的各项性能均优于含未改性BF的复合材料;含10 wt%改性BF的复合材料使其流动速率提高了约65%,改性BF使HDPE的熔融温度最大提高了约 3℃,但大幅降低了HDPE的结晶性能;含 30 wt%改性BF的复合材料导热系数为 0.364 2 w/mK,比纯HDPE 提高了17%.改性BF可以有效提高复合材料的力学性,尤其是15%含量时缺口冲击强度提升了65%.未改性BF对HDPE性能也有提高,但提升幅度均低于改性BF.
Abstract
Using high density polyethylene(HDPE)as matrix and basalt fiber(BF)as reinforcement materi-al,the HDPE/BF composite was prepared by melt blending and injection molding.The effects of unmodified and silane coupling agent modified KH550 on the properties of the composite were studied.The effects of BF content on thermal stability,thermal conductivity,processing fluidity and mechanical properties of composites were investiga-ted.The results show that there is KH550 molecule on the surface of modified BF,and the properties of the com-posite containing modified BF are better than those of the composite containing unmodified BF.The composite con-taining 10 wt%modified BF increases the flow rate by about 65%.The modified BF increases the melting tempera-ture of HDPE by about 3℃,but greatly reduces the crystallization property of HDPE.The thermal conductivity of the composite containing 30 wt%modified BF is 0.364 2 w/mK,which is 17%higher than that of pure HDPE.The modified BF can effectively improve the mechanical properties of composite materials,especlally with 65%in-crease in notch impact strength at 15 wt%content.Unmodified BF also improves the HDPE performance,but the improvement is lower than that of modified BF.
关键词
高密度聚乙烯/玄武岩短纤维/复合材料/硅烷偶联剂Key words
high-density polyethylene/basalt fiber/composites/silane coupling agents引用本文复制引用
出版年
2024
NETL
NSTL
万方数据