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New polymer syntheses VIII. Synthesis, characterization and morphology of new unsaturated copolyesters based on dibenzylidenecycloalkanones

✍ Scribed by Aly, Kamal I.

Publisher
John Wiley and Sons
Year
1998
Tongue
English
Weight
626 KB
Volume
47
Category
Article
ISSN
0959-8103

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✦ Synopsis

A new interesting class of linear, unsaturated copolyesters based on dibenzylidenecycloalkanones has been synthesized by interfacial polycondensation of isophthaloyl chloride or sebacoyl chloride with 2,5-bis(phydroxybenzylidene) cyclopentanone I, 2,6-bis(p-hydroxybenzylidene) cyclohexanone II, 2,6-divanillylidenecyclohexanone III or 2,7-bis(p-hydroxybenzylidene)cycloheptanone IV at ambient temperature. The resulting copolyesters were characterized by elemental analyses, IR spectroscopy, and solubility. Additionally, inherent viscosities of copolyesters in the range 0É53È0É98 dl g~1 were determined. The thermal properties of the polymers were evaluated by TGA and DSC measurements and correlated with their structural units. The crystallinity of some copolyesters was examined by X-ray analysis. In addition, the electrical properties of the copolyesters were tested and the morphology of selected examples of the copolyesters was examined by scanning electron microscopy.

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