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Synthesis and modification of aromatic polyesters with chloroacetyl 3,5‐dibromo‐ p ‐hydroxybenzoic acid
Author(s) -
Ozden Sedat,
Charayev A. M.,
Bazheva R. C.
Publication year - 2008
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.29147
Subject(s) - polyester , terephthalic acid , condensation polymer , limiting oxygen index , polymer chemistry , isophthalic acid , ultimate tensile strength , materials science , molar mass , chemistry , organic chemistry , catalysis , polymer , composite material , char , pyrolysis
Aromatic copolyesters based on diphenylolpropane and 3,5‐dibromo‐ p ‐hydroxybenzoic acid ( p ‐HBA) were synthesized by an acceptor‐catalyzed polycondensation method. During the synthesis, equimolar mixtures of chloranhydrides of isophthalic and terephthalic acids were used. The effects of p ‐HBA on the tensile and thermal properties of the polyesters were investigated. The breaking stress and modulus of elasticity increased with the amount of p ‐HBA up to 10% in molar mass. A further increase in p ‐HBA caused deterioration of the tensile properties. The elongation at break decreased at low p ‐HBA contents (<5%). The addition of p ‐HBA increased the molecular packing and the limiting oxygen index and improved the thermal behavior of the synthesized polyesters. © 2008 Wiley Periodicals, Inc. J Appl Polym Sci, 2009