Thermal degradation mechanisms of aluminium phosphinate, melamine polyphosphate and zinc borate in poly(methyl methacrylate)

Orhan T., Isitman N. A., Hacaloğlu J., Kaynak C.

POLYMER DEGRADATION AND STABILITY, vol.96, pp.1780-1787, 2011 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 96
  • Publication Date: 2011
  • Doi Number: 10.1016/j.polymdegradstab.2011.07.019
  • Journal Name: POLYMER DEGRADATION AND STABILITY
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.1780-1787
  • Keywords: Thermal degradation, Direct pyrolysis mass spectrometry, Organophosphorus flame retardant, PMMA, PHOSPHORUS-CONTAINING MOLECULES, FLAME RETARDANCY MECHANISMS, METHYL-METHACRYLATE, EPOXY-RESINS, FIRE BEHAVIOR, POLYMERS, DECOMPOSITION, COMBINATION, PHOSPHATES
  • Middle East Technical University Affiliated: Yes

Abstract

The aim of this study was to investigate the thermal degradability, and in particular, the thermal degradation mechanism of organophosphorus flame-retardant poly(methyl methacrylate) (PMMA). For this purpose thermogravimetry and direct pyrolysis mass spectrometry analyses were used. Release of diethylphosphinic acid, melamine, and several products involving Al-O-P and N-P linkages were detected from the organophosphorus additive containing aluminium diethylphosphinate, melamine polyphosphate and zinc borate. When incorporated in PMMA, reactions of diethylphosphinic acid, melamine and/or their derivatives with the ester group affected the decomposition pathways by generation of (C(2)H(5))(2)POOCH(3) and HNCO at relatively high temperatures. (C) 2011 Published by Elsevier Ltd.