End Functionality Control of Silane-Terminated Liquid Butadiene Rubber for Silica-Filled Rubber Compounds
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초록
내용
As the global trend shifts toward electric vehicles (EV), tire industry is working on research for improving tire performance which meets requirements of EV. Liquid butadiene rubber is commonly used as substitute for tire processing oil. In this study, functionalized liquid butadiene rubber (F-LqBR) is synthesized using azo initiator with different number of triethoxysilyl end-functionality. F-LqBRs form covalent bonds between the silica surface and the base rubber to improve silica dispersion and reduce rolling resistance. However, proportional to the number of triethoxysilyl groups in F-LqBR, the properties of the silica-filled rubber compound decreased. Consequently, the optimized end functionality of triethoxysilyl groups for F-LqBR in silica-filled rubber compound was two. The di-functional F-LqBR (2-Azo-LqBR) showed an improvement of 10% in rolling resistance, 16% in snow traction, and 17% in abrasion resistance when 10 phr of TDAE oil was substituted.