SYNTHESIS AND LIQUID-CRYSTALLINE PROPERTIES OF NEW THERMOTROPIC POLYURETHANES

Authors
CHIELLINI E GALLI G TRUSENDI S ANGELONI SA LAUS M FRANCESCANGELI O
Citation
E. Chiellini et al., SYNTHESIS AND LIQUID-CRYSTALLINE PROPERTIES OF NEW THERMOTROPIC POLYURETHANES, Molecular crystals and liquid crystals science and technology. Section A, Molecular crystals and liquid crystals, 243, 1994, pp. 135-147
Citations number
32
Categorie Soggetti
Crystallography
Journal title
Molecular crystals and liquid crystals science and technology. Section A, Molecular crystals and liquid crystals → ACNP
ISSN journal
1058725X
Volume
243
Year of publication
1994
Pages
135 - 147
Database
ISI
SICI code
1058-725X(1994)243:<135:SALPON>2.0.ZU;2-2
Abstract
The synthesis and liquid crystal behavior of new thermotropic polyuret hanes derived from different mesogenic diols, alkylene (omega-hydroxya lkyloxy-4-oxybenzoyl)oxybenzoate]s, and 2,4-toluenediiso-cyanate are r eported. Depending upon the chemical structure of the repeat unit, the polyurethanes formed either one or two mesophases extending over a fa irly broad (>60 K) and accessible range of temperature (T-i < 430 K). A cybotactic nematic mesophase was identified in each polyurethane sam ple.