改性隐晶质石墨/炭黑/丁腈橡胶复合材料的制备与性能  

Preparation and Properties of Modified CG/Carbon Black/NBR Composites

作　　者：童曦 伍江涛 高佳华 TONG Xi;WU Jiangtao;GAO Jiahua(Beijing Research and Design Institute of Rubber Industry Co.,Ltd,Beijing 100143,China)

机构地区：[1]北京橡胶工业研究设计院有限公司,北京100143

出　　处：《橡胶工业》2021年第11期832-837,共6页China Rubber Industry

基　　金：国家重点研发计划项目(2017YFB0310905)。

摘　　要：采用液体丁腈橡胶(LNBR)改性隐晶质石墨(CG),研究改性CG/炭黑/丁腈橡胶(NBR)复合材料的硫化特性、物理性能、动态力学性能和填料分散性。结果表明:CG颗粒的尺寸小、断面丰富、表面粗糙和较多结构缺陷增强了其反应活性;CG和改性CG均可以提高硫化胶的拉伸性能和撕裂强度,并且随着其用量增大,硫化胶的物理性能进一步提高;与CG相比,改性CG具有更好的补强效果,这是由于LNBR包覆改性使其表面呈疏水性,有助于填料-橡胶的界面作用增强以及填料在橡胶基体中的分散性和浸润性提高。Cryptocrystalline graphite(CG)was modified by liquid nitrile butadiene rubber(LNBR),and the vulcanization characteristics,physical properties,dynamic mechanical properties and filler dispersion of modified CG/carbon black/nitrile rubber(NBR)composites were studied.The results showed that the reactivity of CG was high due to its small particle size,rich sections,large amount of rough surfaces and many structural defects.The tensile property and tear strength of the vulcanizates were improved by CG and modified CG,and the physical properties of the vulcanizates were further improved with the increase of the addition level of CG and modified CG.Compared with CG,modified CG had a better reinforcement effect.This was because the LNBR coating modification made its surface hydrophobic,which enhanced the interfacial interaction of the filler-rubber and improved the dispersion and wettability of the filler in the rubber matrix.

关 键 词：隐晶质石墨 改性 液体丁腈橡胶 丁腈橡胶 炭黑 复合材料 包覆改性 分散程度 

分 类 号：TQ330.[化学工程—橡胶工业]