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Effect of Acrylonitrile-Butadiene Rubber on the Properties of Silica-Filled Styrene-Butadiene Rubber Compounds: Reduction of Silane Coupling Agent and Diphenylguanidine  

Choi, Sung-Seen (Research Institute of Advanced Materials, Chungnam National University)
Chang, Dong-Ho (Kumho Research and Development Center)
Kim, Ik-Sik (Kumho Research and Development Center)
Publication Information
Elastomers and Composites / v.37, no.4, 2002 , pp. 217-223 More about this Journal
Abstract
Silica-filled rubber compounds show poor filler dispersion and slow cure characteristics compared to carbon black-filled ones. In general, a silica-filled rubber compound contains silane coupling agent (bis-(3-(triethoxysilyl)-propyl)-tetrasulfide, TESPT) and diphenylguanidine (DPG) to improve the filler dispersion and to make fast cure characteristics. Acrylonitrile-butadiene rubber (NBR) improves the filler dispersion in silica-filled styrene-butadiene rubber (SBR) compounds. In this study, effect of NBR on the properties of silica-filled SBR compounds was investigated. Properties of the compounds which contain NBR without DPG or with small amount of TESPT (Compound A) were compared with those of the compounds which contain TESPT and DPG without NBR (Compound B). Scorch time of Compound A is faster than those of Compound B. Modulus and tensile strength of Comound A are slightly lower than those of Compound B. Traction property of the Comound A is better than that of the Compound B. Addition of NBR leads to reduction of the used amount of TESPT and DPG.
Keywords
silica; SBR; NBR; TESPT; DPG;
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