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Materiale Plastice (Mater. Plast.), Year 2010, Volume 47, Issue 4,





Gheorghe Radu Emil MAries Thermal Analysis of Some Physico - mechanical Properties of Polypropylene (PP) Used for Manufacturing of Performance Sport Items


Abstract:
This paper presents the influence of processing temperature on the physico-mechanical properties of polypropylene (PP) used at the injection molding of performance sport items. The test-pieces were molded at the following real injection temperatures: 220, 240, 260, 280 and 300°C. It was determined that the in-mould pressure decreases with the increase of processing temperature The thermal analysis performed were: TG, DSC and DMA. It was established that the processing temperature influences the thermal stability of the polymer molded at 300°C, but the vitrification temperature and the melting temperature are slightly influenced by the processing temperature. The storage modulus E’ is influenced by the processing temperature and stress frequency. Keywords: polypropylene (PP), injection molding, Thermogravimetry (TG), Differential Scanning Calorimetry (DSC), Dynamic-Mechanical Analysis (DMA)



Issue: 2010 Volume 47, Issue 4
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