| Abstract: | 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 1H NMR spectroscopy, and thermogravimetric analysis. These polymers began to lose weight at about 400°C in air being seen as self-extinguishing ones. |
