This research determines whether the materials of volcanic ash (CV), rice husk ash (CR), and thermally treated solid waste (RS-T), coming from the pyrolysis of plastics, have some flame-retardant effect when added to polypropylene flame-retardant additives (such as ammonium polyphosphate and pentaerythritol). These materials were characterized by specific surface area by nitrogen adsorption analysis (Brunauer–Emmett–Teller) and X-ray fluorescence and X-ray diffraction methods. It was determined that SiO2 and Al2O3 are considered as flame-retardant minerals. Composites composed of polypropylene, ammonium polyphosphate, pentaerythritol, and these materials at several concentrations, from 1% to 9%, were prepared. The thermal stability and flame retardancy of the composites synthesized were investigated based on the limiting oxygen index, thermogravimetric analysis, and cone calorimetry. It was determined that these materials have a synergistic action with flame-retardant additives by increasing the fireproof properties of polypropylene. Mechanical properties were determined by tensile tests.
Bibliographical noteFunding Information:
The authors are grateful to the workers from the laboratory of Ecole de Quimica de Lille. They also thank Pierre Bachelet, S?verine Bellayer, Johan Sarazin, and Maria Vargas from the laboratory of Materials Sciences of the Catholic University of Saint Mary for their support. The author(s) disclosed receipt of the following financial support for the research, authorship, and/or publication of this article: This research was financially supported by the France Embassy and Arequipa Regional Government.
© The Author(s) 2019.
- flame retardant