Abstract
The present work is concerned with the comparison of nucleating efficiency of various organic and inorganic fillers of isotactic polypropylene: talc, chalk, wood flour, nano clay particles, carbon black, chitosan in the form of powder of the same content equal to 5 mass%. The kinetics of isothermal crystallization of isotactic polypropylene in the composite systems was evaluated by using DSC. Avrami equation was applied to the results. Calculated K and n parameters depend on filler applied. The σσe surface free energies were also found. The best nucleating agent found here was talc and carbon black. The organic filler as a chitosan powder forms amorphous inclusions in the composites on which IPP molecules cannot be adsorbed. Their presence disturbs a macromolecular diffusion and delays crystallization process of IPP.
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Mucha, M., Królikowski, Z. Application of dsc to study crystallization kinetics of polypropylene containing fillers. Journal of Thermal Analysis and Calorimetry 74, 549–557 (2003). https://doi.org/10.1023/B:JTAN.0000005193.66789.ea
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DOI: https://doi.org/10.1023/B:JTAN.0000005193.66789.ea