Injection Molding of PP/CaCO3 Hybrid Composites Toughened with SEBS-g-MA Elastomer: Morphological and Tensile Properties

Mounir El Achaby; El Mokhtar Essassi; Abou El Kacem Qaiss

doi:10.4028/www.scientific.net/KEM.550.57

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Injection Molding of PP/CaCO₃ Hybrid Composites Toughened with SEBS-g-MA Elastomer: Morphological and Tensile Properties
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Injection Molding of PP/CaCO₃ Hybrid Composites Toughened with SEBS-g-MA Elastomer: Morphological and Tensile Properties

Abstract:

The aim of this work is to prepare, by extrusion, blends of polypropylene (PP)/styrene-ethylene-butadiene-styrene-g-maleic anhydride (SEBS-g-MA) at the ratios of 100/0, 95/5, 90/10, 85/15 80/20. Then, a amount of 10 wt% of calcium carbonate (CaCO₃) was added to each polymer blend to prepare (PP/SEBS-g-MA)/CaCO₃composites with effective ratios of (100/0)/10 (95/5)/10, (90/10)/10, (85/15)/15 and (80/20)/10. Morphological and tensile properties of PP/SEBS-g-MA, PP/CaCO₃ and (PP/SEBS-g-MA)/ CaCO₃ were evaluated and compared. It was found that the presence of SEBS-g-MA improves the particle dispersion and interfacial adhesion. The tensile properties of PP polymer were affected by addition of SEBS-g-MA and/or CaCO₃. Indeed, the addition of only SEBS-g-MA the youngs modulus and tensile strength of PP were remarkably decreased and the elongation at break was significantly increased. In contrast, the PP/ CaCO₃ composites shows improved youngs modulus and tensile strength and reduced elongation at break in regard to neat PP. A balance between these selected properties was found in (PP/SEBS-g-MA)/CaCO₃composites, while the youngs, tensile strength and elongation at break were together increased. .