Macromolecular Research

The Polymer Society of Korea (한국고분자학회)
권호 표지

Nanofiller as Vulcanizing Aid for Styrene-Butadiene Elastomer

  • Sahoo, N.G. (Materials Science Centre IIT) ;
  • Das, C.K. (Materials Science Centre IIT) ;
  • Panda, A.B. (Department of Chemistry IIT) ;
  • Pramanik, P. (Department of Chemistry IIT)
  • Published : 2002.12.01
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Abstract

The use of ZnO and stearic acid is very well known in sulfenamide accelerated sulfur vulcanization of diene elastomers. Zn-ion coated nano filler has been developed and tested, in styrene-butadiene rubber (SBR) as sulfur vulcanizing activator cum reinforcing filler. In this study Zinc oxide has been replaced by the Zn-ion coated nano silica filler with an aim to study the dual role of this nanofiller in SBR. The presence of Zn-ion on the nano silica filler surface activates the sulfur vulcanization by involving Zn++ in to the sulfurating complex formed with thiazole from sulfenamide. The increase of Zn-ion, on the nanofiller, decrease the scorch safety of the elastomer compound but increase the tensile strength, state of cure and tear strength and attain maximum at its 10% level. The presence of stearic acid increases the rate of vulcanization. Replacement of stearic acid with mono-stearate, however, increases the vulcanization rate but decrease the ultimate state of cure. A mechanistic scheme involving dual function of this nanofiller has been suggested.

Keywords

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