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

• Published in: 엘라스토머 및 콤포지트, 53(3) pp. 109 - 123
• Main Authors: 양재경, 박원형, 류창석, 김선정, 김도일, 김종호, 서곤
• Format: Journal Article
• Language: English
• Published: 한국고무학회 01.09.2018
• Subjects: 고분자공학
• ISSN: 2092-9676; 2288-7725
• DOI: 10.7473/EC.2018.53.3.109

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. KCI Citation Count: 1