Abstract
Natural rubber(NR)is widely used in various fields including aerospace,military industry and transportation due to its superior elastici-ty and comprehensive mechanical properties.Nonetheless,the commercial NR prepared by different methods usually exhibits different mechani-cal properties,primarily due to variations in processing conditions during the conversion from latex to bulk rubber material.Consequently,this poses challenges in scientific research and industrial production of NR.In order to assess the properties of various commercially available NR and identify key structural and compositional components,this study systematically compares and analyzes four representative NR raw materials:air dried sheet(ADS),ribbed smoked sheets(RSS),constant viscidity NR(CV),and whole field latex rubber(WF).The investigation focuses on evaluat-ing their static mechanical behavior,SIC behavior,wear resistance,and fatigue resistance.The findings indicate that protein and gel content ex-hibit a crucial influence on the NR properties.These constituents contribute to the formation of a high-crosslinking density region,generating a heterogeneous network structure within the rubber.This structure amplifies strains during deformation,leading to earlier and stronger strain-induced crystallization(SIQ.Among the four commercial NR brands,RSS demonstrates superior overall mechanical and dynamic properties ow-ing to its high protein and gel content.This study serves as a valuable reference for comprehending the differences in properties among various commercial NR,thereby offering guidance for the actual processing and selection of NR.
基金项目
Research and Development Program in key area of Guangdong Province(2020B020217001)
国家自然科学基金(52173058)
国家重点研发计划(2022YFD2301202)
万方数据