Flame-retardant effects of cyclic phosphonate with HALS and fumed silica in polypropylene

ÜREYEN M. E., Kaynak E., Yuksel G.

JOURNAL OF APPLIED POLYMER SCIENCE, vol.137, no.4, 2020 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 137 Issue: 4
  • Publication Date: 2020
  • Doi Number: 10.1002/app.48308
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, PASCAL, Aerospace Database, Applied Science & Technology Source, Biotechnology Research Abstracts, Chimica, Communication Abstracts, Compendex, INSPEC, Metadex, Civil Engineering Abstracts
  • Keywords: cone calorimetry, cyclic phosphonate, flame retardant, N-alkoxy hindered amine, silica nanoparticles, UV stabilizer, MECHANICAL-PROPERTIES, ALUMINUM PHOSPHINATE, FIRE, FUTURE, POLYPHOSPHATE, NANOPARTICLES, COMBINATION, BEHAVIORS, NITROGEN, POLYMER
  • Anadolu University Affiliated: No


In this study, an N-alkoxy-hindered amine-based UV stabilizing agent (NOR-116) and nanosized silica particles (Aerosil R-972) were combined with a cyclic phosphonate based-flame retardant (FR; PCO-900) and incorporated into polypropylene via melt extrusion in a microcompounder. In order to stimulate the conditions in the favor of further processing such as fiber spinning, the content of additives in polypropylene was kept low (up to 6.5 wt %). The effects of the PCO-900, alone and in combination with NOR-116 and Aerosil-R972, on the flammability and thermal stability of polypropylene were evaluated by limit oxygen index (LOI) tests, cone calorimetry, and thermogravimetric analysis. The proposed system with 3.5 wt % PCO-900/1.5 wt % NOR-116/1 wt % Aerosil-R972 decreased the heat release, increased the LOI and thermo-oxidative stability, and, thus, improved the fire resistance of polypropylene. The possible mode of FR activity was also discussed based on the analysis. (c) 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 48308.