LI Xina ， XIONG Yuzhua, b ， CUI Lingfenga ， DAI juna ， WANG Binghuia ， WU Shengxuea
（a. College of Materials and Metallurgy； b. Guizhou Key Laboratory for Mechanical Behavior and Microstructure of Materials，University of Guizhou， Guiyang 550025， China）
Abstract：Different coupling agents such as Si69, NDZ-105 and KH570 were used for surface treatment of graphite. The curing property, mechanical property, cutting resistance and processing property of the modified graphite-NR composites were studied.The results show that the dispersion of graphite modified by coupling agents in natural rubber matrix are improved, the physical entanglements between graphite and rubber chain are increased. Contrast to unmodified graphite-NR composites, the stress at 100%, stress at 300% and tensile strength of modified graphite-NR composites is increased obviously and the cutting loss is decreased. The comprehensive properties of KH570 modified graphite-NR composites is the best. The Payne effect of the modified graphite-NR composites is significantly weakened, but the dynamic loss factor is higher than the unmodified graphite-NR composites.
Keywords: natural rubber; graphite; coupling agent; dispersion property; processing properties
文章编号：1008-5548（2017）05-0077-06
DOI：10.13732/j.issn.1008-5548.2017.05.015
收稿日期：2016-07-07， 修回日期：2016-11-09，在线出版时间：2017-10-30。
基金项目：贵州省重大专项计划项目，编号：2013-6016；贵州大学研究生教育创新基地项目，编号：CXJD[2014]08。
第一作者简介：李鑫（1992—），男，硕士研究生，研究方向为材料的复合改性及高性能化。E-mail:Ergouli1992@163.com。
通信作者简介：熊玉竹（1969—），女，博士，教授，硕士生导师，研究方向为复合材料的结构与性能。E-mail:932271187@qq.com。
