炭黑N330/N990并用对三元乙丙橡胶高速铁路轨枕垫胶料性能的影响

试验研究炭黑N330与热裂法炭黑N990并用比对铁路轨枕垫用三元乙丙橡胶性能的影响。结果表明，用20份炭黑N990等量替代炭黑N330，可使混炼胶的门尼粘度值降低15个单位，硫化胶的压缩疲劳温升降低6 ℃；炭黑N990相对含量增加能改善胶料的回弹性，降低压缩永久变形，提高耐疲劳性能。;The influence of carbon black N330/N990 blending ratio on the properties of EPDM compound for high speed railway pad was studied.The results showed that，when 20phr of N330 in the original formulation was replaced by an equal weight of N990，the Mooney viscosity of the compound decreased by 15 units and the temperature rise in the compression fatigue test was lowered by 6 ℃.With increasing the addition level of N990，the resilience and fatigue resistance of the vulcanizates were improved，and the compression set decreased