【摘要】 采用动态硫化法制备了乙烯-丙烯酸甲酯共聚物(EMA)/氯丁橡胶(CR)热塑性硫化胶(TPV),并系统研究了TPV微观结构、压缩Mullins效应及其可逆回复行为。结果表明，EMA/CR TPV微观相形貌呈现典型“海-岛”相结构；在单轴循环压缩模式下，TPV存在明显Mullins效应；随着加载-卸载循环次数的增多，TPV最大压缩应力、内耗以及tanδ逐渐减小，但瞬时残余变形和应力软化因子都呈增大趋势；随着压缩应变的增大，TPV最大压缩应力、瞬时残余变形、内耗以及tanδ均显著增大；在热处理条件下，TPV Mullins效应可逆回复程度明显提升且在80℃时回复效果较好。更多还原

【Abstract】 Ethylene-methyl acrylate copolymer(EMA)/chloroprene rubber(CR) thermoplastic vulcanized rubber(TPV) was prepared by dynamic vulcanization, and the TPV microstructure, compression Mullins effect and reversible recovery behavior were systematically studied.The results showed that the microscopic phase morphology of EMA/CR TPV showed a typical "sea-island" phase structure.In the uniaxial cyclic compression mode, TPV had obvious Mullins effect.With the increase of the loading-unloading cycles, the maximum compression stress, internal friction and tanδ of TPV gradually decreased, but the instantaneous residual deformation and stress softening factors showed an increasing trend.With the increase of compression strain, the maximum compression stress, instantaneous residual deformation, internal friction and tanδ of TPV increased significantly.Under heat treatment conditions, the reversible recovery degree of TPV Mullins effect was significantly improved, and the recovery effect was better at 80 ℃.更多还原