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Home  >  Journal list  >  Polymer Journal  >  Vol.29  No.2 (1997)  >  pp.134-137

Polymer Journal
<<Previous article Vol.29  No.2 (1997)   pp.134 - 137 Next article>>

Hydrogen Bonding and Mesomorphic Properties for Side Chain Type Liquid Crystalline Polyurethanes Containing Rigid Moieties in the Polymer Backbone

Takashi Mihara1) and Naoyuki Koide1)
1) Department of Chemistry, Faculty of Science, Science University of Tokyo

ABSTRACT:  Side chain type liquid crystalline polyurethane (SLCPU)s containing various kinds of mesogenic groups were prepared by polyaddition of a diol-monomer with p-phenylenediisocyanate. Three SLCPUs (PU-a, b, and c) exhibited typical mesomorphic properties. Further, the relationship between mesomorphic properties and hydrogen bonding between urethane bonds in the polymer backbone (H-bonding) for the three SLCPUs was investigated by thermally controlled FT-IR. A small decrease in the strength of H-bonding was observed with increasing temperature. The magnitude of the decrease in the strength of H-bonding was dependent on the species of the mesogenic group.


Keyword:
Side Chain Type Liquid Crystalline Polymer/ Polyurethane/ Hydrogen Bonding/ FT-IR

Published online: March 30, 2005
© Copyright, 2005 by The Society of Polymer Science, Japan

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