TY - JOUR
T1 - Thermal decomposition of flame-retarded high-impact polystyrene
AU - Jakab, E.
AU - Uddin, Md A.
AU - Bhaskar, T.
AU - Sakata, Y.
N1 - Funding Information:
The authors gratefully acknowledge Venture Business Laboratory of the Okayama University for inviting E. Jakab to carry out this cooperative research in Japan. Research conducted in Hungary was supported by the Hungarian National Research Fund (OTKA No. T037704). The authors thank Dr. Marianne Blazsó for the valuable advice in pyrolysis experiments.
PY - 2003/8
Y1 - 2003/8
N2 - 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).
AB - 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).
KW - Brominated flame retardant
KW - HIPS
KW - High-impact polystyrene
KW - Pyrolysis
KW - SbO
KW - Thermal decomposition
KW - Thermogravimetry
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U2 - 10.1016/S0165-2370(03)00075-5
DO - 10.1016/S0165-2370(03)00075-5
M3 - Article
AN - SCOPUS:0037810263
SN - 0165-2370
VL - 68-69
SP - 83
EP - 99
JO - Journal of Analytical and Applied Pyrolysis
JF - Journal of Analytical and Applied Pyrolysis
ER -