Thermal decomposition of flame-retarded high-impact polystyrene

E. Jakab, Azhar Uddin, T. Bhaskar, Y. Sakata

Research output: Contribution to journalArticle

124 Citations (Scopus)

Abstract

The thermal decomposition of four high-impact polystyrene (HIPS) samples containing brominated flame retardants has been studied. Decabromodiphenyl ether (Br10-DPE) and decabromodibenzyl (Br10-DB) were used as flame retardants and two samples contained antimony trioxide (Sb2O3) synergist besides the brominated additives. The thermal decomposition of HIPS samples was studied by thermogravimetry/mass spectrometry (TG/MS), pyrolysis-gas chromatography/mass spectrometry (Py-GC/MS) and pyrolysis-mass spectrometry (Py-MS). It was established that the brominated additives themselves do not change the decomposition temperature of polystyrene (PS). However, Sb2O3 reduces the thermal stability of the samples indicating that Sb2O3 initiates the decomposition of the flame retardants and PS. Water and styrene products were detected during the first stage of decomposition from HIPS samples containing Sb2O3. Nevertheless, the majority of PS decomposes at a higher temperature. The two brominated flame retardants decompose by different pathways. The scission of C-C bonds, resulting in the formation of bromotoluenes, is the most important reaction of Br10-DB additives. In contrast, Br10-DPE decomposes by an intermolecular ring closure pathway producing brominated dibenzofurans (DBF).

Original languageEnglish
Pages (from-to)83-99
Number of pages17
JournalJournal of Analytical and Applied Pyrolysis
Volume68-69
DOIs
Publication statusPublished - Aug 2003

Fingerprint

Polystyrenes
Flame Retardants
thermal decomposition
flames
flame retardants
polystyrene
Pyrolysis
Flame retardants
Mass spectrometry
mass spectroscopy
decabromobiphenyl ether
Decomposition
decomposition
pyrolysis
Styrene
Antimony
gas chromatography
thermogravimetry
antimony
styrenes

Keywords

  • Brominated flame retardant
  • High-impact polystyrene
  • HIPS
  • Pyrolysis
  • SbO
  • Thermal decomposition
  • Thermogravimetry

ASJC Scopus subject areas

  • Analytical Chemistry
  • Physical and Theoretical Chemistry

Cite this

Thermal decomposition of flame-retarded high-impact polystyrene. / Jakab, E.; Uddin, Azhar; Bhaskar, T.; Sakata, Y.

In: Journal of Analytical and Applied Pyrolysis, Vol. 68-69, 08.2003, p. 83-99.

Research output: Contribution to journalArticle

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