Abstract

Mullins effect during uniaxial cyclic compression tests, together with its reversibility, of ethylene–acrylic acid copolymer (EAA)/nitrile–butadiene rubber (NBR) thermoplastic vulcanizates (TPVs) were investigated systematically. The results showed that EAA/NBR TPVs had excellent mechanical properties when the weight ratio was 40/60. Morphology studies showed that sphere-like NBR particles were dispersed evenly in the etched TPVs surface with diameters of 5–8 μm. The experimental results of Mullins effect indicated that a stress softening phenomenon in the stress–strain curves of EAA/NBR TPVs during the uniaxial loading–unloading cycles could be observed obviously; moreover, the reversibility of Mullins effect could be significantly enhanced by increasing heat treatment temperature.

中文翻译：

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基于乙烯-丙烯酸共聚物/丁腈橡胶混合物的热塑性硫化橡胶的穆林斯效应及其可逆性

摘要

对乙烯-丙烯酸共聚物（EAA）/丁腈橡胶（NBR）热塑性硫化橡胶（TPV）的单轴循环压缩试验中的穆林斯效应及其可逆性进行了研究。结果表明，当重量比为40/60时，EAA / NBR TPV具有优异的机械性能。形态学研究表明，球形NBR颗粒均匀分散在直径5–8μm的蚀刻TPV表面。Mullins效应的实验结果表明，在单轴加载/卸载循环中，EAA / NBR TPV的应力-应变曲线中明显出现了应力软化现象。此外，通过提高热处理温度可以显着提高穆林斯效应的可逆性。