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Title:: Effect of different charge number metal ions on mechanical properties of carboxylated nitrile rubber composites

作者:: 罗犟1; 谢清俊1; 杨树颜2?鄢; 1. 株洲市计量测试检定所，湖南株洲 412007； 2. 东莞理工学院材料科学与工程学院，广东东莞 523808

Author(s):: LUO Jiang1; XIE Qing-jun1; YANG Shu-yan2; 1. Zhuzhou Metrological Testing and Verification Institute, Zhuzhou 412007, China; 2. School of Materials Science and Engineering, Dongguan University of Technology, Dongguan 523808, China

Keywords:: ionic bond; carboxylated nitrile rubber; metal oxide; mechanical property; chemical valence

摘要:: 在羧基丁腈橡胶中分别加入金属氧化物氧化镁、氧化锌和氧化铝，系统研究了金属离子与羧基的相互作用，共混胶硫化特性，硫化胶动态力学性能，复合材料的形貌、拉伸性能及模量-温度关系。结果表明，金属氧化物与羧基丁腈橡胶形成离子键的难易程度与金属氧化物的碱性强弱有关；金属离子具有较高的电荷数、较小的半径和较强的电负性则有利于提高羧基丁腈橡胶复合材料在高温条件下的力学强度。

Abstract:: Three types of metal oxide, magnesium oxide(MgO), zinc oxide(ZnO) and aluminium oxide(Al2O3), were added into carboxylated nitrile rubber (XNBR) to prepared XNBR/metal oxide composites, the properties of which, such as interactions between metal ions and carboxyl groups, curing characteristics of the compounds, dynamic mechanical properties of the valcanizates, micromorphology, mechanical pro-perties and the modulus-temperature relationship of the composites, were investigated thoroughly. The results showed the formation of ionic bonds between XNBR and metal oxide was close to the alkalinity of metal oxide. The metal ion with high charge number, small ionic radius and high electronegativity was benefit to the improvement in mechanical properties of composites under high temperature.