Thermal properties of PP-SiO2 composites filled with Stöber silica
Paulina Jakubowska, Monika Osińska-Broniarz, Agnieszka Martyla, Bogna Sztorch, Agnieszka Sierczyńska, Maciej Kopczyk, Robert Przekop
Quarterly No. 3, 2016 pages 161-166
DOI:
keywords: sol-gel, silica filler, Stöber, thermal properties, composite, polypropylene
abstract The paper analyses the impact of ceramic particles on the thermal properties and flammability of polymer composites. The research subject concerns polypropylene-based composites. Polypropylene was modified with Aerosil 200 commercial silica and Innosilica silica obtained by means of a modified Stöber method. The input material with a variable content of SiO2: amounting to 1, 5 and 10% was produced during injection. The heat resistance of the obtained composites was specified by the determining the Vicat softening temperature (VST) and heat deflection temperature (HDT), and based on differential scanning calorimetry (DSC) measurements, thermogravimetric analysis (TG) and thermal diffusivity (Df). A fire resistance test of the studied composites was also carried out. It was found that silica added to the polypropylene matrix has a favourable influence on or does not worsen the heat resistance of the studied composites. It was also noticed that all the composites, especially those with a 1% filler content, have a greater degree of flammability compared to the input polymer.