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Synthesis of new polyesters containing phosphorus heterocycles and halogen

✍ Scribed by Roşescu, Lidia ;Popescu, Florin ;Petreuş, Oana


Publisher
John Wiley and Sons
Year
1998
Tongue
English
Weight
86 KB
Volume
257
Category
Article
ISSN
0003-3146

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✦ Synopsis


Two series of polyesters containing phenoxaphosphine rings and several halogens were synthesized by low-temperature solution polycondensation in the presence of triethylamine. One series, containing halogens only in the bisphenol moiety, was obtained from 2,8-dichloroformyl-10-phenylphenoxaphosphine-10-oxide and chlorinated bisphenol. In the second series, halogens belonged both to bisphenol and diacid dichlorides. For the last series, 2,8-dichloroformyl-10-(4-bromophenyl)phenoxaphosphine-10-oxide was prepared as a new monomer. All resulting polyesters were characterized by elemental analysis, reduced viscosity, IR and 1 H NMR spectroscopy, and thermogravimetric analysis. These polymers began to lose weight at about 400 8C in air being seen as self-extinguishing ones. ZUSAMMENFASSUNG: Zwei Serien von Polyestern, die Phenoxaphosphinringe und verschiedene Halogene enthalten, wurden bei niedriger Temperatur durch Lo ¨sungspolykondensation in Gegenwart von Triethylamin hergestellt. Die erste Serie, bei der nur die Bisphenoleinheit halogeniert ist, wurde durch Verknu ¨pfung von 2,8-Dichloroformyl-10-phenylphenoxaphosphin-10-oxid mit chloriertem Bisphenol erhalten. Die zweite Reihe entha ¨lt Halogene sowohl im Bisphenol als auch in den Disa ¨uredichloriden. Hierzu wurde ein neues Monomeres, 2,8-Dichloroformyl-10-(4-bromphenyl)phenoxaphosphin-10-oxid, synthetisiert. Alle hergestellten Polyester wurden durch Elementaranalyse, reduzierte Viskosita ¨t, IR-und 1 H-NMR-Spektroskopie sowie thermogravimetrische Analyse charakterisiert. Die Polymeren zeichnen sich durch bei etwa 400 8C beginnenden Gewichtsverlust und selbstverlo ¨schende Eigenschaften aus.


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