原位接枝改性炭黑对天然橡胶性能的影响  

Effects of In-Situ Grafting-Modified Carbon Black on Properties of Natural Rubber

作　　者：付文[1] 刘安华[1] 杨军 

机构地区：[1]华南理工大学材料科学与工程学院,广东广州510640 [2]株洲时代橡塑股份有限公司,湖南株州412007

出　　处：《华南理工大学学报（自然科学版）》2014年第6期51-56,72,共7页Journal of South China University of Technology(Natural Science Edition)

基　　金：广东省自然科学基金资助项目(S2011040001765);广东省教育厅育苗工程资助项目(2013LYM0058);茂名市科技计划项目(201312)

摘　　要：采用原位液相接枝技术在炭黑表面接枝聚乙二醇400,研究了接枝前后炭黑补强天然橡胶的性能.结果表明:在相同填料添加量下,填充接枝改性炭黑的胶料焦烧时间和正硫化时间有所缩短,物理机械性能明显改善;当添加50份填料时,相比于添加未改性炭黑的胶料,填充接枝改性炭黑胶料的结合胶含量提高了16.5个百分点,拉伸强度和撕裂强度分别提升了6.1MPa和19.5kN/m,绝对磨耗质量由0.53g下降至0.37g,硫化胶在0、60和80℃时的tanδ分别下降了16.67%、45.23%和45.45%.动态力学测试和SEM分析表明,胶料性能提升的主要原因是接枝改性炭黑在橡胶基体中分散性的改善及炭黑与橡胶间相互作用力的增加.Polyethylene glycol 400 was grafted onto carbon black （CB） surface by means of in-situ liquid method, and the properties of natural rubber respectively reinforced by carbon black and grafted carbon black were investigated. The results show that （ 1 ） at the same filler dosage, both the scorch time and the curing time of grafted carbon black-filled rubber shorten, and the physical and mechanical properties obviously improve; and （2） as compared with the natural rubber reinforced by carbon black, the rubber reinforced by grafted carbon black with a filler dosage of 50 parts is of bound rubber content increment of 16.5 %, tensile strength increment and tear strength increment of 6.1 MPa and 19.5 kN/m, respectively, abrasion loss decreasing from 0.53 g to 0.37 g, and tanδ value decrement at 0, 60 and 80℃ of 16.67% , 45.23% and 45.45% , respectively. Moreover, the results of dynamic mechanical analysis and SEM test show that the performance improvement of rubber compound mainly owes to better dispersion of grafted carbon black in natural rubber matrix and greater interaction between grafted carbon black and natural rubber matrix.

关 键 词：炭黑 接枝改性 天然橡胶 硫化特性 物理机械性能 动态性能 

分 类 号：TQ332[化学工程—橡胶工业]