Synthesis and characterization of new aromatic polyesters and poly(ester-imide)s containing phosphorous
cyclic bulky groups |
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Authors: | Corneliu Hamciuc Tachita Vlad-Bubulac Oana Petreus Gabriela Lisa |
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Affiliation: | (1) “Petru Poni” Institute of Macromolecular Chemistry, Aleea Gr. Ghica Voda 41A, 700487 Iasi, Romania;(2) Faculty of Industrial Chemistry, Technical University ‘‘Gh. Asachi’’, B-dul D. Mangeron 71, Iasi, Romania |
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Abstract: | New phosphorous-containing polyesters were prepared by polycondensation of 2-(6-oxido-6H-dibenz<c,e><1,2>oxaphosphorin-6-yl)-1,4-naphthalene
diol, 1, with different aromatic dicarboxylic acids using a SOCl2/pyridine
condensing agent. Two poly(ester-imide)s were prepared by polycondensation in solution at high temperature
of the same aromatic bisphenol 1, with diacid chlorides containing preformed
imide rings. The most of the polymers were easily soluble in polar organic solvents such as N-methylpyrrolidone,
N,N-dimethylformamide and chloroform. They showed high thermal stability, the decomposition temperature
being in the range of 330-442 °C and glass transition in the temperature range of 193-226 °C.
One of these polymers exhibited thermotropic liquid crystalline behavior. Due to the presence of phosphorus
the polymers gave high char yield in termogravimetric analysis, hence good flame retardant properties. |
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