Selected Properties of Composites with Polypropylene after Ageing

Abstract:

Changes in selected physical properties of thermoplastic composites during and after exposure materials to ultraviolet radiation and freeze were investigated. The matrix of composite was homopolymer polypropylene. The fillers were talcum, chalk, short glass fiber in mass fraction 10 to 50% and montmorillonite by fraction only 4%. The composites were mixed in plasticizing system of extruder. The length of plasticizing system and number of grooves in feed zone was changed. The samples were exposed for two months to UV and -20°C. The short ageing influenced on hardness, microhardness and Raman spectroscopy of composites. The SEM showed how extrusion process affected the homogeneity of composites structure.

• Periodical: Key Engineering Materials (Volume 635)
• Pages: 212-215
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.635.212
• Online since: December 2014
• Authors: Aneta Krzyzak*, Magdalena Łagožna, Andżelika Nogaj, Ľudmila Dulebová
• Keywords: Extrusion Process, Microhardness, Polypropylene, Thermoplastic Composites, UV

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