SBR-MICA-SILICA COMPOSITIONS AND THEIR PHYSICOMECHANICAL BEHAVIOR

Brazilian muscovite mica was used as filler in vulcanized compositions of styrene-butadiene rubber (SBR) in partial replacement of silica. P hysico-mechanical properties of the compositions, such as tensile and tear strength, 100% modulus, elongation at break, hardness, abrasion l oss and resilience have been studied. The investigations have shown th at it is possible to partially replace silica for mica, without remark able changes in some properties. Relationships between mechanical beha viour and structure have been examined under scanning electron microsc opy (SEM) on the fracture surface of the compositions.