摘要
研究了共混工艺和不同硫化体系对动态硫化三元乙丙橡胶(EPDM)/聚-4-甲基戊烯-1热塑性弹性体(TPX TPV)力学性能的影响,并探讨了不同硫化体系共混物的热氧老化性能和微观相态结构。结果表明,EPDM与TPX先混匀再加入硫化剂的共混物力学性能好于先在EPDM中加入硫化剂再混合的共混物力学性能。硫黄最佳用量为0.4份,硫载体最佳用量为1.5份。当硫化剂选用最佳用量时,共混物具有较好力学性能。硫黄硫化共混物和硫载体硫化共混物分别在100℃×72h和180℃×72h热氧老化条件下的力学性能均有所下降,但幅度不太明显,二者均表现出了较好的耐热氧老化性。DMA结果表明,EPDM与TPX有一定的相容性。
Effects of blend technology and different curing system on mechanical properties of dynamic vulcanized EPDM/TPX TPV were investigated. The thermo-oxidative aging properties and mi- cro-structure of the TPV cured with different curing systems were studied. The results showed that the mechanical properties of the TPV that EPDM and TPX were first uniformly blended then adding curing agent to it were better than those of the TPV that first adding curing agent to EPDM then blended with TPX. The optimum dosage of sulfur and sulfur donator was o. 4 phr and 1.5 phr, respectively. The TPV had good mechanical properties at the optimun dosage of curing agent. The mechanical properties of both the TPV cured with sulfur and the TPV cured with sulfur donator decreased at thermo-oxidative aging condition of 100 ℃ × 72 h and 180 ℃×72 h, respectively. The DMA results showed that both EPDM and TPX had some compatibility.
出处
《特种橡胶制品》
2015年第3期1-5,共5页
Special Purpose Rubber Products
