Effects of Processing Geometry on the Mechanical Properties and Silica Dispersion of Silica-Filled Isobutylene-Isoprene Rubber (IIR) Compounds

롤밀과 밀폐식 혼합기가 실리카 분산 및 부틸고무 복합소재의 물성에 미치는 영향

  • Received : 2010.05.26
  • Accepted : 2010.08.18
  • Published : 2010.09.30

Abstract

We investigated the effects of processing geometry of silica-filled isobutylene-isoprene rubber (IIR) compounds on its mechanical properties and silica dispersion, using a two roll mill and an internal mixer (banbury mixer). The compound processed with the two roll mill showed the longer induction time ($t_2$), higher maximum torque ($T_{max}$), and better silica dispersion than the compound processed with the internal mixer; however, showed slightly the lower cure index ($t_{90}$). The mechanical properties (hardness, 300% modulus, tensile strength, elongation) of the compound processed with two roll mill were higher than compound done with the internal mixer.

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