【摘要】 研究了硫化返原对NR硫化胶的结构和性能的影响。采用化学探测剂脱硫的方法 ,测定了硫化返原过程中NR的交联密度和交联键分布的变化情况 ,结果证实了硫化返原的机理 ;测定了不同温度下随着硫化时间的延长NR力学性能的变化规律以及在硫化期和返原期的动态性能。结果表明 ,动态生热引起返原 ,反过来返原导致损耗模量增大 ,这是轮胎破坏的重要原因更多还原

【Abstract】 The effect of the reversion on the structure and properties of NR vulcanizate was investigated.The crosslink density and distribution of NR vulcanizate were determined during the reversion by the devulcanization with the chemical probes.The test results were in accordance with the mechanism of NR cure and reversion.The physical properties of NR vulcanizate with the cure time at different temperatures,as well as its dynamic properties during cure and reversion were determined.The results showed that the dynamic heat build up resulted in the reversion,which led the increase of loss modulus and the premature failure of tire.更多还原