Effect of Ulexite on Mechanical, Thermal, and Flame Properties of Halogen-Free Fire Retardant Polypropylene |
| L. Altaya, Y. Sekib, T. Uysalmanc, G. Sevig Tantugc, A. Isbilirc, M. Sarikanata
aEge University, Mechanical Engineering Department, Bornova, Izmir, Turkey bDokuz Eylul University, Faculty of Science, Buca, Izmir, Turkey cIzmir Eğitim Sağlık Sanayi Yatırım A.Ş., Turgutlu, Manisa, Turkey |
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| In this study it was aimed to improve the fire retardant performance of halogen free flame-retardant polypropylene by increasing limiting oxygen index value. Ammonium polyphosphate, pentaerythritol, and ulexite were used to improve flame retardancy of polypropylene. Ulexite powder filled (1, 2, and 4 wt%) polypropylene composites were obtained by using a twin-screw extruder and injection molding method. Thermal, mechanical, and flame retardant performances of polypropylene composites were investigated by several characterization techniques. Limiting oxygen index value was obtained higher than 45% when ulexite was added into polypropylene at 1-4 wt%. It was observed that flame retardant additives do not change the mechanical properties considerably. The effect of ulexite addition on melting and crystallization temperatures of polypropylene-based composite is not pronounced. |
DOI:10.12693/APhysPolA.135.1143 topics: ulexite, flame retardant, halogen free, polypropylene composites, mechanical properties, thermal properties |