Liquid crystalline behavior of poly(m-phenylenebutadiynylene)s having a mesogenic substituent

Citation
I. Kinoshita et al., Liquid crystalline behavior of poly(m-phenylenebutadiynylene)s having a mesogenic substituent, MOLEC CRYST, 365, 2001, pp. 1193
Citations number
4
Categorie Soggetti
Physical Chemistry/Chemical Physics
Volume
365
Year of publication
2001
Database
ISI
SICI code
Abstract
Poly(m-phenylenebutadiynylene)s having a side chain with p-(4-pentylcyclohe xyl)phenyl and cyanobiphenylyl mesogenic core were synthesized from corresp onding m-diethynylbenzene by oxidative polycondensation with a Cu-amine cat alyst under O-2. These polymers showed an enantiotropic nematic phase that was confirmed by polarizing optical microscopy and XRD. Uniaxial alignment of these polymers was carried out by a rubbing technique. Polarizing IR res ults of the aligned samples suggested that the main chain and the mesogenic side chain were aligned in parallel to the rubbing direction.