Effect of Ulexite on Mechanical, Thermal, and Flame Properties of Halogen-Free Fire Retardant Polypropylene

Altay L., Seki Y., Uysalman T., Tantug G. S., Isbilir A., Sarikanat M.

ACTA PHYSICA POLONICA A, vol.135, no.5, pp.1143-1146, 2019 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 135 Issue: 5
  • Publication Date: 2019
  • Doi Number: 10.12693/aphyspola.135.1143
  • Journal Name: ACTA PHYSICA POLONICA A
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.1143-1146
  • Dokuz Eylül University Affiliated: Yes

Abstract

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.