防焦剂CTP用量对白炭黑填充硫化胶动态力学性能的影响

研究防焦剂CTP用量对白炭黑填充NR/BR胶料性能的影响，重点分析了防焦剂CTP用量对硫化胶动态力学性能的影响及机理。结果表明：随着防焦剂CTP用量的增大，混炼胶的门尼焦烧时间显著延长，门尼粘度变化不大，硫化速率减小；硫化胶的硬度和拉伸强度变化不大，定伸应力呈降低趋势，拉断伸长率和撕裂强度呈增大趋势，回弹值呈减小趋势，但总体差别不大；硫化胶的压缩疲劳温升和永久变形呈增大趋势，损耗因子显著增大。硫化胶动态力学性能降低可能受填料网络增强和交联密度降低等因素的共同影响。;The effect of the addition level of anti-scorching agent CTP on the silica filled composite was investigated.The influence and mechanism of the addition level of anti-scorching agent CTP on the dynamic mechanical properties of the vulcanizate were emphatically analyzed.The results showed that as the addition level of CTP increased，the scorch time of the compound was significantly prolonged，the Mooney viscosity changed little，the curing rate slowed down.The hardness，tensile strength and tear strength of vulcanizates changed little，the modulus decreased，the elongation at break showed an increasing trend，the rebound decreased slightly，but the difference was small.The compression fatigue temperature rise and compression set of vulcanizates increased，the loss factor increased significantly.Filler network strengthened and crosslink density reduction might be the reason of these changes