Ethylene-methyl acrylate copolymer(EMA)/chloroprene rubber(CR)thermoplastic vul-canizate(TPV)was prepared by dynamic vulcaniza-tion and tear strength with different m(EMA)/m(CR)was investigated.The Mullins effect of TPV under tear mode and reversible behavior under heat treat-ment were studied.The results showed that tear strength of EMA/CR TPV was the highest when m(EMA)/m(CR)was 40/60.There was obvious Mullins effect in EMA/CR TPV under uniaxial cyclic tearing mode,and when the strain rate increased,the maximum tear strength,internal friction and damping factor of EMA/CR TPV all increased.When the tear strain increased,the maximum tear strength,instan-taneous residual deformation,internal friction and damping factor of EMA/CR TPV all increased,but the stress softening factor decreased.The reversible recovery ability of Mullins effect of EMA/CR TPV was enhanced after heat treatment,and the reversible recovery effect was the best at 80 ℃.
维普
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