Effect of Ulexite on Mechanical, Thermal, and Flame Properties of Halogen-Free Fire Retardant Polypropylene
Articles > Article · 2019
Authors: Lütfiye ALTAY, Yoldaş Seki, Tuğçe Uysalman, G. Sevig Tantug, Akın İşbilir, Mehmet SARIKANAT
Acta Physica Polonica A, Journal Indexed in SCI Expanded, International, WoS, 2019, vol 135, pp 1143-1147
DOI: 10.12693/aphyspola.135.1143
Summary
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.