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Proceedings Paper

Synthesis and phase behavior of novel poly(urethane-urea)s based on 4,4'-bis(2-hydroxyethoxy)biphenyl, 2,4-tolylene di-isocyanate and poly(oxypropylene)diamines
Author(s): A. Wolinska-Grabczyk; J. Muszynski; Piotr Penczek
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Paper Abstract

Novel liquid crystalline poly(urethane-urea)s (PUUs) were synthesized from 2,4-tolylene diisocyanate, 4,4'-bis(2- hydroxyethoxy)biphenyl and poly(oxypropylene)diamines (Jeffamine). The poly(urethane-urea)s were characterized by FTIR, GPC, DSC and polarizing microscopy. The mesomorphic properties of the polymers were investigated as a function of their molecular structure by changing alternatively the molecular weight of Jeffamine or the initial diol and diamine composition. The applied structural modifications allowed us to obtain thermotropic PUUs exhibiting mesomorphic behavior in a wide temperature range along with the PU exhibiting no liquid crystallinity.

Paper Details

Date Published: 1 January 1998
PDF: 4 pages
Proc. SPIE 3319, Liquid Crystals: Chemistry and Structure, (1 January 1998); doi: 10.1117/12.301307
Show Author Affiliations
A. Wolinska-Grabczyk, Institute of Coal Chemistry (Poland)
J. Muszynski, Institute of Coal Chemistry (Poland)
Piotr Penczek, Industrial Chemistry Research Institute (Poland)

Published in SPIE Proceedings Vol. 3319:
Liquid Crystals: Chemistry and Structure
Marzena Tykarska; Roman S. Dabrowski; Jerzy Zielinski, Editor(s)

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