Melt Elasticity Phenomenon of Multicomponent (Talc and Calcium Carbonate) Filled Polypropylene

Abstract

The compound of single-component filled polypropylene (PP) (consists of either talc or CaCO₃) and multicomponent filled PP (talc/CaCO₃/PP) are prepared by melt mixing using Brabender Plasticorder internal mixer. All systems exhibit good stability and normal flow in the molten state. The multicomponent filled PP has shown an intermediate degree of die swell and flow instabilities. The defect of extrudate in the extrusion process in the form of melt fracture could only be evidenced in the semisolid state of PP melt. The result shows that composite with highest content of talc exhibits the least melt fracture.

Keywords

polypropylene talc calcium carbonate multicomponent elastic melt fracture deformation

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