Evaluation and Improvement of Mechanical, Thermal and Rheological Properties of Polypropylene (PP) using Linear Low Density Polyethylene (LLDPE)

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for many years, polypropylene (PP) has been very successfully used for film blown, injection molded, and extrusion applications. This work aimed to study the effect of linear low density polyethylene (LLDPE) on mechanical, thermal and rheological properties of homopolymer polypropylene (PP) for injection molded application. In the experimental study, five formulations of PP and LLDPE viz. 90/10, 80/20, 70/30, 60/40 and 50/50 wt % were prepared for injection moulding machine. The mechanical properties such as flexural modulus and impact resistance were investigated. The thermal property such as heat deflection temperature (HDT) was evaluated. In addition, melt flow index (MFI) of the blend have been determined. Results showed improvement on the mechanical, thermal and rheological properties. It is then concluded that the optimum composition of PP/LLDPE blends provided the best mechanical, thermal properties and a moderate rheological property is 70/30.

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