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Influence of lateral substituents on thermal behavior and solubility of aromatic LC‐polyesters
Author(s) -
Schmidt HansWerner
Publication year - 1989
Publication title -
makromolekulare chemie. macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 0258-0322
DOI - 10.1002/masy.19890260106
Subject(s) - thermotropic crystal , polyester , phenylene , substituent , liquid crystal , moiety , solubility , lyotropic , materials science , polymer chemistry , terphenyl , phase (matter) , biphenylene , organic chemistry , chemistry , polymer , liquid crystalline , optoelectronics
Structure ‐ property relations of substituted para‐linked aromatic homopolyesters are reported. Thermotropic liquid‐crystalline substituted poly (1,4‐phenylene terephthalate)s with phase transition temperatures less than 230 °C and good solubility in common organic solvents have been synthesized. If a noncoplanar 2,2′‐disubstituted biphenylene moietyis combined with a monosubstituted phenylene moiety with sufficient bulky substituent, polyester with similar properties were obtained. Although these polyesters are soluble up to high concentrations, no lyotropic liquid‐crystalline behavior was observable.