炭黑、白炭黑及其混合填料在异戊橡胶中的网络化行为  

Formation of Network by Carbon Black,Silica and Their Mixing Fillers in Isoprene Rubber

作　　者：肖建数 王玉阁 谷倩倩 张之材 吕永鹏 尹园[1] 孙洪国[1] 郑雅芳 孙昭艳[1,2] XIAO Jian-Shu;WANG Yu-Ge;GU Qian-Qian;ZHANG Zhi-Cai;LYU Yong-Peng;YIN Yuan;SUN Hong-Guo;ZHENG Ya-Fang;SUN Zhao-Yan(State Key Laboratory of Polymer Physics and Chemistry,Changchun Institute of Applied Chemistry,Chinese Academic of Sciences,Changchun 130022,China;School of Applied Chemistry and Engineering,University of Science and Technology of China,Hefei 230026,China)

机构地区：[1]中国科学院长春应用化学研究所,高分子物理与化学国家重点实验室,长春130022 [2]中国科学技术大学应用化学与工程学院,合肥230026

出　　处：《应用化学》2022年第12期1833-1841,共9页Chinese Journal of Applied Chemistry

基　　金：国家自然科学基金重大项目(No.20790344)资助。

摘　　要：填料的网络化行为对橡胶的补强起重要作用。为了探究炭黑、白炭黑以及炭黑/白炭黑混合填料在橡胶基体中的网络化行为及其对橡胶性能的影响规律,制备了不同填料类型及填充比例的异戊橡胶复合材料,通过对相同混炼和硫化工艺条件下混炼胶和硫化胶的微观形貌、流变及拉伸等性质进行分析,发现3种填料体系在硫化后的颗粒分散程度均好于混炼胶,其中白炭黑在硫化胶中的颗粒尺寸更小但更容易聚集。在混合填料体系中,2种填料倾向于各自形成聚集体,这使得混合填料体系的低应变区储能模量值低于单一填料体系。随着填料质量份数的增加,3种填料体系的断裂强度均呈现先增加后降低的趋势,同时断裂伸长率单调下降,且疲劳温升显著提高。此外,混合填料体系在高填充份数时的疲劳温升高于单一填料体系。The network formed by fillers has great influence on the mechanical properties of rubber materials.To understand the formation of network by carbon black,silica,and carbon black/silica mixing fillers in rubber and its influence on the properties of rubber,isoprene rubber/filler composites with different filler loadings are prepared and their micromorphology,rheological and tensile properties are investigated. It is found that the dispersion of fillers is better in rubber after cure than that in rubber before cure for all three rubber systems,and the filler size of silica is smaller than that of carbon black,but the aggregation is more severe in silica filled rubber system. In mixed filler system,the two fillers tend to aggregate separately,leading to the low modulus at small strain than that in single filler system. With the increase of the filler loading,the tensile strength increases first and then decreases,the elongation at break decreases,and the temperature rise in compression flexometer tests increases. Moreover,the temperature rise in mixed filler system is higher than that in single filler system at high filler loading.

关 键 词：填料网络 橡胶网络 异戊橡胶 炭黑 白炭黑 

分 类 号：O631[理学—高分子化学]