EVA/NBR TPV压缩Mullins效应的研究
Study on Compression Mullins Effect of EVA/NBR TPV
张卫然 1李东辉 1褚建强 1高原 1王兆波1
作者信息
- 1. 青岛科技大学材料科学与工程学院 ,青岛 266042
- 折叠
摘要
采用动态硫化法制备了乙烯-醋酸乙烯共聚物(EVA)/丁腈橡胶(NBR)热塑性硫化胶(TPV),系统研究了EVA/NBR TPV压缩Mullins效应.结果表明,随着EVA/NBR共混比及压缩应变的增大,TPV压缩Mullins行为趋于显著;当压缩应变一定时,首次循环加载-卸载过程中最大压缩应力、内耗和tanδ均达到最大值,而第2次加载-卸载过程中均发生大幅下降,之后下降趋势逐渐减弱.在相同应变下,EVA/NBR共混比60/40的TPV最大压缩应力、残余变形、内耗、应力软化因子和tanδ均大于共混比40/60的TPV,变化幅度较为明显.
Abstract
Ethylene-vinyl acetate copolymer(EVA)/nitrile rubber(NBR)thermoplastic vulcani-zate(TPV)was prepared by dynamic vulcanization method,and the EVA/NBR TPV compression Mullins effect was systematically studied.The results showed that with the increase of EVA/NBR blending ratio and compression strain,the compression Mullins effect of TPV was more obvious.When the compression strain was constant,the compression stress,internal friction and tan δ reached the maximum during the first cyclic loading-unloading process,while it decreased significantly during the second loading-unloading process,and then the downward trend gradually weakened.Under the same strain,the maximum compression stress,residual deformation,internal friction,stress softening factor and tanδ of TPV with an EVA/NBR blending ratio of 60/40 were greater than those of TPV with a blending ratio of 40/60,and the variation was obvious.
关键词
乙烯-醋酸乙烯共聚物/丁腈橡胶/动态硫化/Mullins效应Key words
ethylene-vinyl acetate copolymer(EVA)/nitrile rubber(NBR)/dynamic vulcanization/Mullins effect引用本文复制引用
基金项目
山东省自然科学基金(ZR2021ME028)
出版年
2024
NETL
NSTL
维普
万方数据