摘要
研究防焦剂CTP用量对白炭黑填充天然橡胶/顺丁橡胶胶料性能的影响,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 NR/BR composite was investigated,particularly,the influence and mechanism on the dynamic mechanical properties. The results showed that as the addition level of CTP increased,the Mooney scorch time of the compound was significantly prolonged,the Mooney viscosity changed little,and the curing rate slowed down. The hardness and tensile strength of the vulcanizates changed little,the modulus decreased,the elongation at break and tear strength showed an increasing trend,and the rebound value decreased slightly,but the difference was small. The compression fatigue temperature rise and compression set of the vulcanizates increased,and the loss factor increased significantly. Strengthened filler network and crosslink density reduction might be the reasons of these changes.
作者
刘震
吉欣宇
王茂英
LIU Zhen;JI Xinyu;WANG Maoying(EVE Rubber Institute Co.,Ltd,Qingdao 266045,China)
出处
《橡胶工业》
CAS
2018年第8期910-915,共6页
China Rubber Industry
基金
国家重点研发计划项目(2017YFB0307100)
