Tytuł pozycji:
Badania dynamicznych właściwości mechanicznych kompozytów na osnowie polipropylenu wzmocnionych włóknem szklanym
Przeanalizowano wpływ zawartości włókna szklanego na dynamiczne właściwości mechaniczne kompozytów na osnowie polipropylenu. Badaniom poddano kompozyty o zawartości 30 i 50% włókna szklanego. W celach porównawczych badano też dynamiczne właściwości mechaniczne osnowy kompozytu. W ramach badań określono również wpływ wygrzewania na te właściwości.
The effect of glass fibre content on dynamical properties of polypropylene composites has been examined. Within the confines of the work the annealing influence on the properties has also been determined. Polypropylene and its composites filled with 30 and 50% of glass fibre have been tested. The investigation of dynamical properties of composites matrix has been made in order to compare. Dynamic mechanical tests were conducted in three-point bending mode by a dynamic mechanical thermal analyser (DMA 242 by Netzsch) under the following conditions: specimens dimension: 50x10x4 mm, temperature interval: 0 to 130°C, heating rate 2°C/min at frequency 10 Hz. Figure 1 shows the storage modulus (E') and loss modulus coefficient (tg b) measured by DMA at 10 Hz as a function of temperature for polypropylene and its composites. The glass transition the most evident for polypropylene (Fig. 1a). In case of polypropylene composites range of glass transition is less evident, in particular for composite polypropylene with 50% glass fibre content. The biggest tendency decreasing of storage modulus as a function of temperature was noted for polypropylene (Fig. 1a) and the least for composite polypropylene with 50% glass fibre content (Fig. 1c). It was found, that increase in of glass fibre content in the composites decrease value of tg b The influence of heat-treatment (annealing) shows the bigger values of the storage modulus E'.
