Materiale Plastice
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Materiale Plastice (Mater. Plast.), Year 2015, Volume 52, Issue 4,

Gheorghe Radu Emil Maries, Dan Chira, Constantin Bungau The Influence of Processing Temperatures of (HDPE), (PMMA), (PC+ABS) on Some Mechanical Properties of Items Obtained Through Injection

This paper presents the influence of processing temperatures of high-density polyethylene (HDPE), polymethyl methacrylate (PMMA), polycarbonate and acrylonitrile butadiene styrene blend (PC+ABS) on some mechanical properties when obtained through the injection of items from various industries. The HDPE samples were obtained at the following injection temperatures: 180, 190, 200, 210, and 220°C. The PMMA samples were obtained at the following injection temperatures: 220, 230, 240, 250, and 260°C, and PC+ABS samples were obtained at the following injection temperatures: 230, 240, 250, 260, and 270°C. Determining the mechanical properties was made using determining methods of tensile properties, of Izod impact test, and Shore Durometer hardness test. It was observed in the case of the three analyzed polymers that increasing the processing temperature hardly influences their respective hardness. The Izod shock resistance for the three analyzed polymers decreases along with the increase of the processing temperature by injection. The tensile strength at break is influenced by the processing temperature. The increase of the processing temperatures by injection in the case of the three analyzed polymers leads to the decrease of the tensile strength at break. The lowest values of the tensile strength at break occur at the highest processing temperatures. Keywords: high density polyethylene (HDPE), polymethyl methacrylate (PMMA), acrylonitrile butadiene styrene polycarbonate blend (PC+ABS), tensile tests, Izod impact test, Shore Durometer hardness test

Issue: 2015 Volume 52, Issue 4
Publication date: 2015/12/30
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