The influence of processing and soaking on dynamical properties of polyamide 6.6 with glass fibre composite
Adam Gnatowski, Dariusz Kwiatkowski, Jacek Nabiałek
Quarterly No. 2, 2009 pages 128-132
DOI:
keywords: composites, dynamical properties, polyamide 6.6, glass fibre
abstract In this work the results of investigations of conservative modulus value and mechanical loss coefficient polyamide 6,6 with addition of glass fibre were presented. The main purpose of polymeric composites manufacturing is wish to eliminate or re-duce drawbacks which polymers are characterised with and also to strive for reduction of the price of expensive polymers with particular, very precious properties by mixing them with fillers but without significant deterioration of their properties. Next purpose is to combine certain important properties of polymers with reduction their individual disadvantages. The prop-erties of the polymer composites depend significantly on the type of the components and conditions of the injection moulding. That kind of influence manifests especially in the change of the dynamical properties. The investigations for the influence of conditions of the injection moulding on the properties of PA 6.6 composite with glass fibre commercial name of Vampamid 66 2526 V0 Naturale 30 have been conducted. Investigation have been conducted for the composite before as well as after soak-ing. Mechanical received characterizations as the result of research at the static load measured in the room temperature are inadequate to forecasting of the comportment of the material in given conditions of the use and longs. Fully to characterize properties of investigated composites and to rate material will keep in provided for conditions of the usage, was qualified tem-perature dependences of the value of dynamic Young modulus and the tangent of mechanical losses and was qualified the in-fluence of the change of the frequency. It the influence of soaking and conditions of the injection moulding was established was, in this and glass fibre on conservative modulus value and mechanical loss coefficient. The highest value of the conserva-tive module for PA 6.6 composite with glass fiber was obtained at injection temperature of 280°C and form temperature of 80°C. At the temperature of the processing 265°C lower values of the conservative module were registered. The inverse depen-dence was obtained for samples after soaking. In this case, the significant increase of the conservative module was registered for composites after soaking, but obtained at a lower temperature processing.