Effect Of Silanization Degree Of Silica On Properties Of Rubber Compound And Rolling Resistance Of Tire

With the increasing emphasis on energy conservation,the development of lowresistance tires has become one of the focus of tire companies.Silica is a wellrecognized filler in the tire industry that reduces the rolling resistance of tires.Silica is one of the most important fillers in the tire industry.Compared to conventional carbon black,silica used in combination with silane coupling agents can give tires better performance.Due to the strong polarity of the surface of the silica itself,the silica particles are extremely agglomerated and difficult to disperse,and the silylation reaction with the silane can improve the problem.In this paper,by adjusting the mixing process,optimizing the input sequence of some raw materials,introducing new additives and other methods to improve the dispersion of silica,the feasibility of improving the degree of silanization reaction is studied.And through the relevant tests to study the effect of the degree of silanization reaction on the performance of the rubber compound and the rolling resistance of the tire.This article will explore the feasibility of increasing the degree of silanization of silica,by several methods that extending the silanization reaction time,separating the silica,adding ZnO and 6PPD later,adding the DPG in advance,adding the silica dispersant and the mercaptosilane.The results show that the above methods can bring about the improvement of the degree of silanization of the silica rubber,and at the same time reduce the heat generation of the rubber compound.The silanization reaction time is increased from 0s to 120 s,which can reduce the Payne effect by 36.6%,separate input of silica can reduce the Payne effect by 3.6%,adding ZnO later can reduce the Payne effect by 7.9%,adding 6PPD later can reduce the Payne effect by 3.1%,adding DPG in advance can reduce the Payne effect by 2.0%,adding a silica dispersant can reduce the Payne effect by 8.7%,Adding mercaptosilane NXT and supplementing sulfur content can reduce the Payne effect by 4.6%.The actual production formula was optimized by the above method,and the test results showed that the optimization brought about an increase in the degree of silanization reaction of silica and reduced the heat generation of the rubber compound.The tire was made using the rubber compound before and after the improvement and the rolling resistance test was performed.The results show that increasing the degree of silanization reaction by 37.2% can reduce the rolling resistance of the tire by 6.2%.