硫化时间对NR/BR并用胶中交联密度的分布以及胶料耐磨性的影响  

Effect of curing time on distribution of crosslinking density in NR/BR blends and wear resistance of rubber compounds

作　　者：庞松 徐新建 陈家辉 吴友平[1] PANG Song;XU Xinjian;CHEN Jiahui;WU Youping(Laboratory of Preparation and Processing of Novel Polymer Materials of Beijing City, Beijing University of Chemical Technology,Beijing 100029,China;Zhongce Rubber Co.Ltd,Hangzhou 310018,China)

机构地区：[1]北京化工大学北京市新型高分子材料制备与成型加工重点实验室,北京100029 [2]杭州中策橡胶有限公司,浙江杭州300018

出　　处：《弹性体》2019年第5期11-16,45,共7页China Elastomerics

摘　　要：通过冰点降低法和核磁共振(NMR)法研究了不同硫化时间下天然橡胶(NR)/顺丁橡胶(BR)并用胶中交联密度的分布情况,并探究了硫化时间对并用胶耐磨性的影响.结果表明,NR/BR并用胶中BR相的交联密度比NR相高,且两相间交联密度差距随着硫化时间的延长而逐渐变小;随着硫化时间的延长,并用填充胶中的耐磨性先提高后保持较好水平,胶料的耐磨性主要受平均交联密度影响.The distribution of crosslink density in NR/BR blends curing for different time was studied by means of the freezing points depression of solvent within swollen networks as well as the NMR technique,and the effect of curing time on wear resistance of NR/BR blends was investigated.The results showed that the crosslink density of NR/BR blends was more likely to distribute in the BR phase,and the crosslink density difference between the two phases gradually decreased with the prolongation of the vulcanization time;As the curing time extended,the wear resistance of the filler first increased and then maintained at a high level.The wear resistance of the rubber was mainly affected by the average crosslink density.

关 键 词：天然橡胶/顺丁橡胶并用胶 交联密度分布 冰点降低法 核磁共振法 耐磨性能 

分 类 号：TQ330.72[化学工程—橡胶工业]