As filler, silica particles are used to reduce rolling resistance of tire with SBR matrix which not only enhances fuel efficiency but also improves tire physical properties such as traction and abrasion. However, silica dispersion within SBR is hampered by polarity difference. To overcome this problem, silica dispersants such as an amphiphilic block copolymer were added to the SBR/silica compound.Therefore we synthesized p(styrene-r-butadiene)-b-p(poly(ethylene glycol) methyl ether methacrylate) (p(SB-b-PEGMA)). And the improved properties induced by the improved silica dispersion were verified by applying the method to SBR/silica compounds. Prepared p(SB-b-PEGMA) were characterized by GPC and 1H NMR. The SBR 1739/silica compounds with the applied silica dispersant exhibited higher moduli at 100% and 300% elongation, higher degrees of cross-linking density, and better wear resistances than the SBR/silica compounds without any silica dispersant. From the Payne effect analyses, we determined that the SBR 1739/silica compounds with the applied silica dispersant had lower ?G' compared to the SBR 1739/silica compounds without any silica dispersant. The TEM measurements also indicated that the SBR/silica compounds containing the silica dispersant showed better dispersion. Therefore, we could confirm that the silica dispersant assisted in the reduction of silica flocculation in the silica-filled SBR compounds.synthesis of p(SB-b-PEGMA)

Synthesis of silica dispersant through combination of living anionic polymerization and controlled radical polymerization

248th National Meeting (2014)

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