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采用旋转滚筒式磨耗机研究了在不同环境介质下天然橡胶(NR)相对分子质量对橡胶磨耗性能的影响。研究发现,干磨引起的磨损比湿磨引起的磨损大得多,这是因为在干磨的条件下橡胶磨损主要是由粘附摩擦引起的,而在湿磨的条件下橡胶磨损主要是由滞后摩擦引起的。在同样的介质下,随着橡胶相对分子质量的减小,硫化胶的物理性能变差,动态损耗因子增大,即橡胶的磨损随着相对分子质量的减小而增大。
The influence of the relative molecular mass of natural rubber (NR) on the wear behavior of rubber under different environmental media was studied by rotary drum-type abrasion machine. It has been found that the wear caused by dry grinding is much greater than the wear caused by wet grinding because rubber wear is mainly caused by adhesion friction under dry grinding conditions whereas rubber wear under wet grinding conditions is mainly caused by Hysteresis caused by friction. Under the same media, the physical properties of the vulcanizates become worse and the dynamic loss factor increases with the decrease of the molecular weight of the rubber, that is, the wear of the rubber increases with the decrease of the relative molecular mass.