The Effect of Surface Treatment of Barium Sulphate on the Mechanical Properties of Polypropylene-Barium Sulphate Composites

Abstract

Polypropylene (PP) composites were prepared by compounding PP with untreated, as well as treated barium sulphate. Barium sulphate filler had been treated with different surface modifiers such as sodium dodecyl benzene sulphonate (SDBS), polyoxyethylene sorbitan monooleate (Tween 60) and oleic acid. The mechanical properties of the prepared composites were evaluated. It was found that the filler treatment with SDBS enhanced the tensile yield strength and hardness of the resulting composites and also the elongation at rupture for most of the composites. Tween 60 and oleic acid as treating agents for the filler had the same effect on the tensile yield strength, while increasing their amounts on the surface decreased the elongation properties of the composites.

Rubber nanocomposites based on compatibilized NBR/SBR blends using a series of amphiphilic montmorillonites

“…The connected loss in M H À M L for M23 is presumably caused by the overplasticization effect of the greasy modifying layer on Mont-100 that became largely concentrated in this phase. These effects are very similar to previous ones found by Essawy et al 13,14 who applied a series of MMTs and barium sulphates, treated up to different extents with surface hydrophobizing agents, as reinforcing agents for polypropylene. The results showed that the extent of hydrophobization plays a major role in keeping balance between the stiffening effect of the inorganic particulates from one side and the plasticizing-compatibilizing effect from another side.…”