Abstract
Poly Propylene (PP) was blended with High impact poly styrene (HIPS) (10-25%) using a twin screw extruder. Then the test specimens were prepared using an injection molding machine and testings were done as per ASTM standards. The mechanical properties like Tensile modulus, Flexural strength and Flexural modulus were increased. The impact strength, Tensile strength and elongation were decreased. In the thermal properties HDT was improved because HIPS has higher properties than that of PP. The Arc resistance was little lowered. The shrinkage was decreased. Accelerated UV Weathering was also carried out using an accelerated weather-o-meter. The PP-HIPS blends were found to be photo-degradable after 125 hours of UV light exposure in accelerated Weather-o-meter and in about 2.5 months in the out-door exposure.
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