Journal
POLYMER DEGRADATION AND STABILITY
Volume 93, Issue 6, Pages 1059-1066Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.polymdegradstab.2008.03.021
Keywords
flame-retardant polymers; thermal degradation; pyrolysis-gas chromatography/mass; spectrometry studies; deoxybenzoin
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The thermal degradation behavior of novel ultra-fire-resistant polymers and copolymers containing deoxybenzoin units in the backbone was studied by pyrolysis-gas chromatography/mass spectrometry (Py-GC/MS). The polymers were synthesized by the polycondensation of 4,4'-bishydroxydeoxybenzoin (BHDB) with isophthaloyl chloride (to give polyarylates), phenylphosphonic dichloride (to give polyphosphonates), and their mixtures (to give poly(arylate-co-phosphonate) copolymers). The thermal decomposition, under nitrogen conditions, of BHDB-polyarylate was characterized by a simultaneous degradation of both the bisphenolic (deoxybenzoin) and isophthalate sub-units, whereas a three-step decomposition phenomenon was observed for the BHDB-polyphosphonate. BHDB-polymers containing phosphonate groups in the backbone did not show any phosphorus-based volatile decomposition products, whereas the corresponding bisphenol A-based polyphosphonates released volatile decomposition products comprised mainly of phosphorus-containing compounds. (c) 2008 Elsevier Ltd. All rights reserved.
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