文献类型：期刊文献

中文题名：玻璃纤维的偶联/接枝改性及其对HDPE/竹粉复合材料性能的影响

英文题名：Coupling/Grafting Modification of Glass Fiber and Its Effect on the Properties of HDPE/Bamboo Flour Composites Technique

作者：张炜鹏[1];KHANAL Santosh[1];徐世爱[1]

机构：[1]华东理工大学材料科学与工程学院上海市先进聚合物材料重点实验室,上海200237

年份：2019

卷号：32

期号：3

起止页码：329

中文期刊名：功能高分子学报

外文期刊名：Journal of Functional Polymers

收录：CSTPCD;;北大核心:【北大核心2017】；CSCD:【CSCD_E2019_2020】；

基金：国家自然科学基金联合基金项目(U1507123)

语种：中文

中文关键词：HDPE/BF复合材料;玻璃纤维;KH570;偶联/接枝改性

外文关键词：HDPE/BF composites;glass fiber;KH570;coupling/grafting modification

摘要：通过熔体共混制备了玻璃纤维(GF)增强的高密度聚乙烯(HDPE)/竹粉(BF)复合材料(HDPE/BF)。为了增强GF与基体之间的相互作用,先用γ-甲基丙烯酰氧基丙基三甲氧基硅烷对GF进行处理,在GF表面引入双建,然后在熔体共混过程中加入少量过氧化二异丙苯,引发双建与基体之间的接枝反应,使GF与HDPE产生化学键合。通过弯曲和冲击实验测试了复合材料的力学性能,通过热失重和维卡软化点表征了复合材料的热性能,并用扫描电子显微镜观察了复合材料的形貌结构。结果表明,通过偶联/接枝的协同改性,GF与基体之间的界面相互作用增强,使HDPE/BF复合材料的力学性能和热性能得到大幅提高。
The reinforced high-density polyethylene (HDPE)/bamboo flour (BF) composites were prepared by melt blending using maleic anhydride grafted HDPE (HDPE- g -MAH) as a compatibilizer and glass fiber (GF) as a reinforcing filler. In order to improve the interfacial adhesion between GF and HDPE and the dispersion of GF in the matrix, a silane coupling agent 3-methacryloxypropyltrimethoxysilane(KH570)with unsaturated double bonds was used to modify GF. Moreover, dicumyl peroxide (DCP) was used to initiate the grafting reaction between the double bonds in KH570 and HDPE. The modified GF was characterized by Fourier transform infrared spectroscopy (FT-IR) and energy dispersive spectroscopy (EDS), and the morphology and properties of HDPE/BF composites reinforced by GF were characterized by scanning electron microscopy (SEM), mechanical testing, Vicat softening temperature ( T VS ) measurement and thermogravimetric (TG) analysis. Results indicate that KH570 modification can improve the interfacial adhesion and the dispersion of GF, resulting in great improvement of the mechanical properties of the composite, and the impact strength, flexural strength and flexural modulus of the HDPE/BF composite ( m (GF-KH570)∶ m (HDPE/BF)=10%) are increased by 48%, 21% and 25%, respectively, compared with HDPE/BF composite. The interfacial interaction between GF-KH570 and the matrix can be further enhanced by the chemical bonding resulting from the grafting reaction initiated by DCP, thus the resultant composite exhibits excellent balance properties, and the impact strength, flexural strength and flexural modulus of the resultant HDPE/BF composite is increased by 69%, 40% and 43%, respectively, compared with the corresponding HDPE/BF composite.