SYNTHESIS, CHARACTERIZATION, AND PHOTOREACTION OF PHOTOREACTIVE LIQUID-CRYSTALLINE BLOCK COPOLYETHERESTERS

Authors
KAWATSUKI N KIKAI A FUKAE R YAMAMOTO T SANGEN O
Citation
N. Kawatsuki et al., SYNTHESIS, CHARACTERIZATION, AND PHOTOREACTION OF PHOTOREACTIVE LIQUID-CRYSTALLINE BLOCK COPOLYETHERESTERS, Journal of polymer science. Part A, Polymer chemistry, 35(9), 1997, pp. 1849-1855
Citations number
16
Categorie Soggetti
Polymer Sciences
Journal title
Journal of polymer science. Part A, Polymer chemistry → ACNP
ISSN journal
0887624X
Volume
35
Issue
9
Year of publication
1997
Pages
1849 - 1855
Database
ISI
SICI code
0887-624X(1997)35:9<1849:SCAPOP>2.0.ZU;2-J
Abstract
Photo-crosslinkable thermotropic liquid crystalline block copolyethere sters with photoreactive hard segment of poly(hexamethylene p-phenylen ediacrylate) and soft segment of poly(tetramethylene ether) were synth esized by melt polycondensation from n-butyl-p-phenylenediacrylate, he xamethylene glycol, and poly(tetramethylene ether) glycol (PTMG, M-n = 1000-3000). The influence of molecular weight and composition of PTMG unit on the thermal behavior was determined by differential scanning calorimetry and polarized optical microscopy. All synthesized block co polymers show thermotropic liquid crystalline phase and can photo-cros slink by UV irradiation. Photoreaction of the copolymer thin film was carried out using Hg-UV light and investigated by FT-IR spectroscopy a nd a dynamic viscoelastic analyzer. (C) 1997 John Wiley & Sons, Inc.