无卤氮磷系阻燃剂对阻燃三元乙丙橡胶胶料性能的影响

Effect of Halogen-free Nitrogen Phosphorus Flame Retardants on Properties of EPDM Compounds

以三元乙丙橡胶(EPDM)为主体材料,分别采用5种无卤氮磷系阻燃剂FR-680,206,AT-903C,FR35RP和FR21RP(用量为110份)制备阻燃EPDM胶料,考察5种无卤氮磷系阻燃剂对EPDM胶料性能的影响。结果表明:5种无卤氮磷系阻燃剂均能明显提高EPDM硫化胶的阻燃性能,EPDM硫化胶的极限氧指数均在30%以上;填充阻燃剂FR-680和FR35RP的EPDM硫化胶具有优异的物理性能,但其阻燃性能相对较差;填充阻燃剂FR21RP的EPDM硫化胶的拉伸强度为7.0 MPa,极限氧指数为39%,总热释放量最大值为83.43 MJ·m^(-2),总烟释放量最小值为462.42 m^(2)·m^(-2),其综合性能最佳。

In this study,flame-retardant ethylene-propylene-diene-propylene rubber(EPDM)compounds were prepared by adding five halogen-free nitrogen phosphorus flame retardants,FR-680,206,AT-903C,FR35RP and FR21RP(110 phr),respectively,and the effects of those five halogen-free nitrogen phosphorus flame retardants on the properties of EPDM compounds were investigated.The results showed that,all five halogen-free nitrogen phosphorus flame retardants could significantly improve the flame retardant properties of the EPDM vulcanizates,and the limiting oxygen index of the EPDM vulcanizates was above 30%.Moreover,the EPDM vulcanizates filled with flame retardant FR35RP and FR-680 had excellent physical properties,but their flame retardant properties were relatively poor.It was found that the overall properties of the EPDM vulcanizates filled with flame retardant FR21RP were the best,with a tensile strength of 7.0 MPa,a limiting oxygen index of 39%,a maximum total heat release(THR)rate of 83.43 MJ·m^(-2),and a minimum total smoke release(TSR)rate of 462.42 m^(2)·m^(-2).