Synthesis and characterization of poly(oxy-1,4-phenyleneoxycarbonyl-1,4-phenyleneoxypolymethylene)s

A multistep synthetic route for the preparation of a series of poly(oxy-1,4-phenyleneoxycarbonyl-1,4-phenyleneoxypolymethylene)s having a varying length of the polymethylene spacer from the di- to the hexamethylene group is reported. The polymers prepared were characterized particularly for their li...

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Bibliographic Details
Published in:Polymer (Guilford) 1993, Vol.34 (14), p.3019-3024
Main Authors: Jin, Jung-II, Cho, Yong-II, Sohn, Byung-Hee, Kang, Chung-Seock
Format: Article
Language:English
Subjects:
Applied sciences
Exact sciences and technology
liquid crystalline polymers
main chain polyesters
Organic polymers
Physicochemistry of polymers
poly(oxy-1,4-phenyleneoxycarbonyl-1,4-phenyleneoxypolymethylene)
Polymers with particular structures
Preparation, kinetics, thermodynamics, mechanism and catalysts
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Summary:A multistep synthetic route for the preparation of a series of poly(oxy-1,4-phenyleneoxycarbonyl-1,4-phenyleneoxypolymethylene)s having a varying length of the polymethylene spacer from the di- to the hexamethylene group is reported. The polymers prepared were characterized particularly for their liquid crystalline properties by differential scanning calorimetry, wide-angle X-ray diffractometry and observation of their textures on a polarizing optical microscope. All the polymers, with the exception of the trimethylene polymer, formed the nematic phase in melt. They exhibited the well known odd-even effect at melting temperature as well as at isotropization temperature.
ISSN:0032-3861
1873-2291
DOI:10.1016/0032-3861(93)90629-O