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http://dx.doi.org/10.7473/EC.2018.53.3.109

Effects of Coupling and Dispersion Agents on the Properties of Styrene-Butadiene Rubber/Butadiene Rubber Compounds Reinforced with Different Silica Contents  

Yang, Jae-Kyoung (Mirae SI)
Park, Wonhyeong (Mirae SI)
Ryu, Changseok (Mirae SI)
Kim, Sun Jung (Mirae SI)
Kim, Doil (Mirae SI)
Kim, Jong-Ho (School of Chemical Engineering, Chonnam National University)
Seo, Gon (Mirae SI)
Publication Information
Elastomers and Composites / v.53, no.3, 2018 , pp. 109-123 More about this Journal
Abstract
The effect of the silica content on the state and properties of silica-filled styrene-butadiene rubber/butadiene rubber (SBR/BR) compounds containing coupling and dispersion agents was evaluated by varying the content of silica from 50 to 120 phr. Bis-[(triethoxysilyl)propyl] tetrasulfide (TESPT) and zinc 2-ethylhexanoate (ZEH) were used as the coupling and dispersion agents, respectively. The maximum silica content in the pristine material was 80 phr, which increased to 120 phr upon the addition of TESPT and ZEH. The incorporation of TESPT considerably improved most of the rubber properties due to its coupling action and the suppression of silica flocculation, while further addition of ZEH resulted in additional improvements. The properties of the rubber compounds with different silica contents can be fully explained either by an enhancement of the rubber-silica interactions or by their deterioration due to an excessive amount of silica aggregates.
Keywords
SBR/BR; silica content; coupling agent; dispersion agent; physical property;
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