Influence Of Tread Resin On Properties Of Highly Filled Silica/SSBR Compounds

Taking health,safety and environment issues into account,tire processing oils,especially aromatic hydrocarbons oil containing polycyclic aromatic hydrocarbons(PAHs),are being replaced gradually.Currently,high aromatic hydrocarbon oil alternatives in industry are mainly treated distillate aromatic extracts("TDAE")and mild extracted solvate("MES").But there are disadvantages such as the limitation of supply and the deterioration of properties of rubber compounds using environmentally-friendly oil.In this paper,six kinds of resin were used to replace TDAE in tire tread compound.The purpose of this study was to investigate the effect of resin on the processing performance,mechanical properties and dynamic performance of rubber composites and explore the possible functions of tread resin in tire manufacturing process.In this paper,the effects of different content of coumarone resin,styrene resin,C5/C9 petroleum resin,C9 petroleum resin and terpene resin on the properties of functionalized SSBR and SSBR compounds and influence of various components(TDAE,silica,resin)on viscoelasticity of F-SSBR compounds were studied.The results show that the rubber compounds has the best performance when the content of resin is 10 phr;Compared the six resins,compound with styrene resin has the best performance,while the C9 petroleum resin has the worst performance;The addition of resin to the F-SSBR can prolong the scorch time of the compound,shorten the vulcanization time,enhance strength and improve the wet traction performance,but the rolling resistance also increases significantly;The resin has better effect on the improvement of properties of the SSBR than that in F-SSBR compound.In the SSBR compound,the styrene resin can not only extend the scorch time of the compound,reduce the vulcanization time,improve the processing performance of the compound,but also greatly improve the wet traction of the compound in the case of a small degree of deterioration of the performance of the rolling resistance,and there is a certain degree of improvement of wear resistance at the same time.Styrene resin can be used as a green plasticizer in SSBR compound to partly replace the TDAE and can improve the comprehensive performance of rubber compound.A new type of abrasion equipment which can be used to study the VOC emission and abrasive particle size distribution during tire wear process was designed and manufactured.The equipment was used to compare the effects of aromatic oil,TDAE,styrene resin and C9 petroleum resin on the amount of wear,large abrasive particle size distribution and TVOC(total organic volatiles)release of F-SSBR compound.The results show that the use of C9 petroleum resin instead of TDAE in F-SSBR compound can improve its wear resistance and the particle size of the debris is large,but it releases a large number of TVOC in the wear process,the amount of TVOC released of compound with C9 petroleum resin is even higher than that of compound with the high aromatic oil.Styrene resin can effectively reduce the release of VOC,and the amount of wear and abrasive particle size distribution are similar to the compound with TDAE,so the styrene resin can replace TDAE as a green plasticizer of SSBR.