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Polyarylates based on 3, 4'‐disubstituted benzophenones
Author(s) -
Stagnaro Paola,
Valenti Barbara,
Cavazza Barbara,
Costa Giovanna,
Trefiletti Vincenzo
Publication year - 1997
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/masy.19971220119
Subject(s) - thermotropic crystal , comonomer , copolymer , liquid crystal , condensation polymer , materials science , polymer chemistry , polymer , liquid crystalline , phase (matter) , isotropy , chemical engineering , chemistry , organic chemistry , composite material , optics , optoelectronics , physics , engineering
New thermotropic aromatic poly(ketoesters) have been obtained by copolymerization of 3‐hydroxy‐4'‐carboxybenzophenone (3, 4'‐HCBP) or of the isomeric 4‐hydroxy‐3'‐carboxybenzophenone (4, 3'‐HCBP) with some commercial aromatic hydroxyacids. The polymers have been prepared both by direct polycondensation in solution and in bulk. Homopolymers of 3, 4'‐HCBP and 4, 3'‐HCBP melt to an isotropic liquid, while a nematogenic behaviour is shown by samples with a comonomer content higher than 30%. A preliminary investigation has been carried out to determine the influence of the liquid‐crystalline phase on their transport properties.