摘要
研究了促进剂Ｍ与ＤＭ在ＮＲ中的硫化特性，并深入探讨了它们对胶料加工性能及物性影响的差异。试验结果表明，促进剂Ｍ的焦烧速度、硫化速度比ＤＭ快，硫化平坦性比ＤＭ差、在较低温度下促进剂Ｍ对ＮＲ的增塑效果高于ＤＭ，但随着温度的升高，ＤＭ的增塑效果可超过Ｍ。促进剂Ｍ的活化能比ＤＭ低得多，说明其硫化速度对温度的依赖性小于ＤＭ。此外．含促进剂Ｍ胶料的拉伸强度、定伸应力、抗撕裂性、弹性等均略低于含ＤＭ的胶料，而耐热老化性能却比ＤＭ胶料好。
The vulcanization behaviour of M or DM containing NR compounds was studied and their effects on the processibility and physical properties were in detail respectively investigated. The results showed that the accelerator M gave more rapid scorch rate and cure rate,but worse cure plateau than the accelerator DM. The accelerator M gave larger plastication to NR than DM at lower temperature,but DM would give larger plastication than M as the temperature increased. The fact that the activation energy of M was much lower than that of DM implied less dependence of its cure rate on temperature than that of DM. In addition,the tensile strength, modulus, tear resistance and rebound resilience of M containing compound were somewhat lower than those of DM containing compound, but the former gave better heat-aging resistance than the latter.
出处
《橡胶工业》
CAS
北大核心
1996年第8期478-481,共4页
China Rubber Industry
关键词
硫化
促进剂
胶料
橡胶
cure,accelerator,activation energy
