Phosphate-polyester copolymers were synthesized from spirocyclic pentaerythritol di(phosphate acid monochloride)s (SPDPC), which is an intumescent, phosphate flame retardant. Because of the new monomer being introduced, the structure and properties of the polyester were altered. The effects of the p
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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