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EAA/NBR TPV压缩应力松弛可逆回复机制及模型构建
引用本文:孙颖涛,刘菲菲,王兆波. EAA/NBR TPV压缩应力松弛可逆回复机制及模型构建[J]. 特种橡胶制品, 2020, 0(2): 1-5,10
作者姓名:孙颖涛  刘菲菲  王兆波
作者单位:青岛科技大学材料科学与工程学院
基金项目:山东省自然科学基金(ZR2017MEM021)。
摘    要:采用动态硫化法制备了乙烯-丙烯酸共聚物/丁腈橡胶热塑性硫化胶(EAA/NBR TPV),系统研究了其力学性能、微观结构、压缩应力松弛及可逆回复行为,探讨了可逆回复机制并构建了数学模型,还研究了橡塑比对可逆回复不同阶段应力松弛时间的影响。结果表明,当EAA/NBR质量比为40/60时,TPV综合性能最佳且应力松弛行为主要由EAA连续相提供,此时NBR分散相对应力松弛行为的影响较小;升高热处理温度或延长热处理时间均可显著加快TPV压缩应力松弛可逆回复程度;当热处理温度接近EAA树脂相熔点时,TPV可逆回复程度接近100%。

关 键 词:乙烯-丙烯酸共聚物  丁腈橡胶  动态硫化  压缩应力松弛  可逆回复

Compression Stress Relaxation Reversible-recovery Mechanism of EAA/NBR TPV and Its Model Establishment
SUN Ying-tao,LIU Fei-fei,WANG Zhao-bo. Compression Stress Relaxation Reversible-recovery Mechanism of EAA/NBR TPV and Its Model Establishment[J]. Special Purpose Rubber Products, 2020, 0(2): 1-5,10
Authors:SUN Ying-tao  LIU Fei-fei  WANG Zhao-bo
Affiliation:(Qingdao University of Science&Technology,Qingdao 266042,China)
Abstract:Thermoplastic vulcanizates(TPV)based on Ethylene-acrylic acid copolymer(EAA)/NBR were prepared by using dynamic vulcanization.The mechanical properties,microstructure,compression stress relaxation and reversible-recovery behaviors were investigated systematically.The reversible-recovery mechanism was discussed and the maths model was established.The effects of rubber-plastic ratioes on the stress relaxation time at a different periods were also investigated.The results indicated that the comprehensive performance of EAA/NBR TPV was optimum when EAA/NBR mass ratio was 40/60,the stress relaxation was mainly provided by EAA continuous phase.The influence of NBR dispersed phase on stress relaxation was a little.The compression stress relaxation reversible-recovery degree was improved with rise of heat-treatment temperature or prolongation of heattreatment time,and the reversible-recovery degree of EAA/NBR TPV was close to 100% when heattreatment temperature approached EAA melting point.
Keywords:Ethylene-acrylic acid copolymer  nitrile butadiene rubber  dynamic vulcanization  compression stress relaxation  reversible-recovery
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