双驱动同步齿轮泵式滤胶机滤网过滤对溶聚丁苯橡胶/顺丁橡胶并用胶性能的影响

Effect of Screen Filtration of Double Drive Synchronous Gear PumpRubber Filter on Properties of SSBR/BR Blend

研究经双驱动同步齿轮泵式滤胶机滤网过滤的溶聚丁苯橡胶(SSBR)/顺丁橡胶(BR)并用胶的性能变化以及滤网孔径对SSBR/BR并用胶性能的影响。结果表明:经滤胶机滤网过滤后,SSBR/BR并用胶的硫化特性和物理性能改善;随着滤网孔径的减小,SSBR/BR并用胶的邵尔A型硬度、100%定伸应力、300%定伸应力、拉伸强度、拉断伸长率和撕裂强度都呈先增大后减小的趋势,Payne效应越来越弱;滤网孔径为75μm时,SSBR/BR并用胶的拉伸强度和撕裂强度最大,分别比未过滤的SSBR/BR并用胶增大27.5%和33.3%,耐屈挠性能最好,损耗因子(tanδ)峰值最大,玻璃化温度最高,60℃时的tanδ最小,滚动阻力最低。

The property change of solution polymerized styrene butadiene rubber(SSBR)/butadiene rubber(BR)blend filtered through a double drive synchronous gear pump rubber filter and the effect of the screen aperture on the properties of SBR/BR blend were studied.The results showed that,the vulcanization characteristics and physical properties of the SSBR/BR blend were improved after the screen filtration of the rubber filter.With the decrease of the screen aperture,the shore A hardness,tensile stress at 100%elongation,tensile stress at 300%elongation,tensile strength,elongation at break and tear strength of the filtered SSBR/BR blend increased first and then decreased,and the Payne effect became weaker.When the screen aperture was 75μm,the tensile strength and tear strength of the filtered SSBR/BR blend were the largest,which were 27.5%and 33.3%larger than those of the unfiltered SSBR/BR blend,respectively,the flexure resistance was best,the tanδpeak value was the largest,the glass transition temperature was the highest,the tanδat 60℃was the smallest,and the rolling resistance was the lowest.