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New polymer syntheses VIII. Synthesis, characterization and morphology of new unsaturated copolyesters based on dibenzylidenecycloalkanones
Author(s) -
Aly Kamal I.
Publication year - 1998
Publication title -
polymer international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.592
H-Index - 105
eISSN - 1097-0126
pISSN - 0959-8103
DOI - 10.1002/(sici)1097-0126(199812)47:4<483::aid-pi91>3.0.co;2-f
Subject(s) - crystallinity , cyclopentanone , condensation polymer , cyclohexanone , materials science , polymer chemistry , polymer , morphology (biology) , solubility , scanning electron microscope , chloride , chemical engineering , organic chemistry , chemistry , composite material , catalysis , biology , metallurgy , genetics , engineering
A new interesting class of linear, unsaturated copolyesters basedon dibenzylidenecycloalkanones has been synthesized by interfacialpolycondensation of isophthaloyl chloride or sebacoyl chloride with2,5‐bis( p ‐hydroxybenzylidene)cyclopentanone I,2,6‐bis( p ‐hydroxybenzylidene)cyclohexanone II, 2,6‐divanillylidenecyclohexanone III or2,7‐bis( p ‐hydroxybenzylidene)cycloheptanoneIV at ambient temperature. The resulting copolyesters werecharacterized by elemental analyses, IR spectroscopy, and solubility.Additionally, inherent viscosities of copolyesters in the range0·53–0·98dlg −1 were determined.The thermal properties of the polymers were evaluated by TGA and DSCmeasurements and correlated with their structural units. Thecrystallinity of some copolyesters was examined by X‐rayanalysis. In addition, the electrical properties of the copolyesterswere tested and the morphology of selected examples of thecopolyesters was examined by scanning electron microscopy. © 1998Society of Chemical Industry