摘要
研究了用DCP作硫化剂时木质素的用量对NBR胶料硫化特性和硫化胶物理性能的影响 ,并与硫黄硫化体系进行了对比。试验结果表明 ,随着木质素用量的增大 ,NBR胶料的ML 和MH 增大 ,t10 保持不变 ,t90有所延长 ;当木质素用量为 5 0份时 ,NBR硫化胶的综合物理性能最佳 ,拉伸强度、定伸应力和撕裂强度均明显高于硫黄硫化胶。动态粘弹特性分析表明 ,木质素与NBR具有良好的相容性 ,DCP硫化胶的玻璃化转变温度比硫黄硫化胶约低 4℃。综合性能分析认为 。
The effect of lignin proportion on the curing behavior of NBR/lignin compound and the physical properties of vulcanizate was investigated by using DCP as curing agent and comparing with sulfur curing system.The test results showed that M L and M H of NBR/lignin compound increased, t 10 kept unchanged and t 90 lasted a little,as the lignin proportion increased;and the optimum comprehensive physical properties of vulcanizate were obtained,the tensile strength,modulus and tear strength were significantly better than those of sulfur cured vulcanizate when 50 phr of lignin was used.It was found through the analysis of dynamic visco elastic characteristics that the lignin had good compatibility to NBR,and the T g of DCP cured NBR was about 4 ℃ lower than that of sulfur cured NBR.It was considered through the analysis of comprehensive properties that DCP could initiate an in situ chemical reaction between NBR and lignin.
出处
《橡胶工业》
CAS
北大核心
2001年第10期603-606,共4页
China Rubber Industry
