ABS/NBR热塑性硫化胶压缩Mullins效应及其可逆恢复的研究  

Compression Mullins Effect and Reversibility of ABS/NBR TPV

作　　者：魏东亚[1] 何宁 王兆波[1] 

机构地区：[1]青岛科技大学材料科学与工程学院,山东青岛266042 [2]青岛市产品质量监督检验所,山东青岛266101

出　　处：《橡胶工业》2016年第11期655-660,共6页China Rubber Industry

基　　金：山东省自然科学基金资助项目(ZR2012EMM002);山东省高等学校科技计划项目(J12LA15);青岛市科技发展计划项目[12-1-4-3-(9)-jch]

摘　　要：研究丙烯腈-丁二烯-苯乙烯三元共聚物（ABS）/丁腈橡胶（NBR）热塑性硫化胶（TPV）的压缩Mullins效应及其可逆恢复。结果表明：NBR粒子均匀分散在TPV表面,其粒径为10-15μm;在循环单轴压缩过程中TPV出现明显Mullins效应,且同一压缩应变下,TPV的最大压缩应力、内耗和损耗因子（tanδ）均在第1次加载-卸载循环时达到最大,在第2次加载-卸载循环时显著下降,此后呈缓慢下降趋势;随着压缩次数增加,TPV的瞬时残余形变和应力软化因子（Ds）增大;随着压缩应变增大,TPV的最大压缩应力、瞬时残余形变、内耗和tanδ均显著增大,Ds减小;随着热处理温度升高,TPV在第2次循环压缩时最大压缩应力的恢复程度增大,热处理温度为110℃时,TPV压缩Mullins效应的恢复效果最佳。The compression Mullins effect and reversibility of thermoplastic vulcanizate（TPV） based on acrylonitrile-butadiene-styrene terpolymer（ABS）/nitrile butadiene rubber（NBR） blends were investigated. It was found that NBR with dimension of 10~15 μm was dispersed evenly in the surface of TPV. The Mullins effect of TPV was clear during uniaxial loading-unloading cycles,the maximum stress,internal friction and loss factor（tanδ） of TPV under the fixed strain level showed the highest values at the first cycle, respectively, and they decreased obviously at the second cycle and continued to decrease, but only slightly, in the following cycles. When the number of the compression cycle increased,the instantaneous residual deformation and stress softening factor（Ds） increased. With the compression strain increasing,the maximum stress,instantaneous residual deformation,internal friction and tanδ of TPV increased obviously,and Ds decreased. The maximum compression stress reversibility of TPV during the second compressionwas improved with the heat treatment temperature increasing,and the best performance was achieved at 110 ℃.

关 键 词：丙烯腈-丁二烯-苯乙烯三元共聚物 丁腈橡胶 热塑性硫化胶 压缩Mullins效应 可逆性 

分 类 号：TQ330.1[化学工程—橡胶工业]