Study On The Fundamentals Of Application Of Integrated Rubber And Solution-Polymeried Styrene-Butadiene Rubber Rubber

In recent20years, our country pays more and more attention to energy conservation and emissions reduction. The requirements of environmental protection, energy saving, safe and comfort for cars are becoming more and more vital. So car tire must have a better wear resistance, lower rolling resistance and good wet skid resistance. But the three performances are called rubber "magic triangle" in the rubber. So it is very important to find ways to balance these three performances. Integrated rubber (SIBR) and solution polymerized butadiene styrene rubber(SSBR) are the two kinds of rubbers for solving this problem. But the domestic researches on SIBR and SSBR lie in the initial stage. So this paper is mainly to study the rules of application of domestic SIBR and SSBR in tread rubber in order to promote the development of domestic SIBR and SSBR in tread rubber.(1) This experiment studied the rules and differences of physical and mechanical properties,dynamic mechanical properties, wear resistance, heat build-up of compression fatigue and cutting resistance of two kinds of domestic SIBRs(LHSIBR and YHSIBR) with carbon black or silica as the fillers. The results found that in terms of physical and mechanical performance, YHSIBR had higher tensile strength. But the difference of tear strength was small; In terms of dynamical cutting loss, LHSIBR with carbon black as the fillers was better than YHSIBR with carbon black as the fillers while using sillica as the fillers, YHSIBR was better than LHSIBR; In terms of dynamical properties, YHSIBR had much higher tanδ values at0℃and lower tand values at60℃。(2) This experiment studied the rules and differences of physical and mechanical properties, dynamic mechanical properties, wear resistance, heat build-up of compression fatigue and cutting resistance of BR/SIBR composites with different mass rates and NR/SIBR composites with different mass rates. TEM results demonstrated that the morphology was uniform as the ratios of BR/SIBR were20/80,30/70and40/60;50/50BR/SIBR composite presented evident phase separation. BR/SIBR composites kept almost the same heat build-up of compression fatigue as SIBR composite. But BR/SIBR composites had worse tensile strength, tear strength, wear resistance and cutting loss than SIBR composite. DMTA results demonstrated that BR/SIBR composites showed narrower tand peaks than SIBR composite; TEM showed that the morphology was uniform as the ratio of NR/SIBR was20/80;30/70NR/SIBR and40/60NR/SIBR composites presented evident phase separation. DMTA results showed that NR/SIBR presented broader tanδ peaks. In addition, NR/SIBR composites kept almost the same tensile strength and tear strength as SIBR composte, but worse cutting resistance and wear resistance, and higher heat build-up than SIBR composite.(3)The experiment studied the rules and differences of physical and mechanical properties, dynamic mechanical properties, wear resistance, heat build-up of compression fatigue and wet skid resistance of two kinds of domestic new type SSBRs (SSBR2557S and SSBR2564A) filled with oil. And foreign SSBR(SSBR6270) and SIBR were compared with them. The result found there were no obvious differences of physical and mechanical properties of the three kinds of SSBR. But physical and mechanical properties of SIBR were much worse than those of them. What’s more, SSBR2557S and SSBR6270had a good wet skid resistance, SSBR2564A had a good wear resistance.(4)The Experiment compared SSBR2557S composites with SSBR6270composites with different mass sillica as the fillers because of outstanding performance of SSBR2557S. The result found that tensile strength and tear strength of SSBR6270composites were better than SSBR2557S under the same mass sillica. As the mass of sillica increased, wet skid resistance, heat build-up of compression fatigue and wear resistance became worse and worse. The value of tanδ at0℃of SSBR2557S with60percentage sillica was the highest while the value of tanδ at60℃of SSBR6270with60percentage sillica was the smallest.