High birefringence photopolymerizable phenylacetylene liquid crystals

Citation
C. Sekine et al., High birefringence photopolymerizable phenylacetylene liquid crystals, LIQ CRYST, 28(10), 2001, pp. 1505-1512
Citations number
18
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Physical Chemistry/Chemical Physics
Journal title
LIQUID CRYSTALS
ISSN journal
0267-8292 → ACNP
Volume
28
Issue
10
Year of publication
2001
Pages
1505 - 1512
Database
ISI
SICI code
0267-8292(200110)28:10<1505:HBPPLC>2.0.ZU;2-U
Abstract
Photopolymerizable three-ring phenylacetylene (3PA) liquid crystalline Comp ounds were synthesized and the physical properties of the monomers and poly mers were characterized in the expectation of obtaining high birefringence polymers. 3PA monomers containing acrylate substituents exhibited enantiotr opic nematic phases and high An values of around 0.35. Homogeneous alignmen t was retained after polymerization and high values of Deltan (similar to 0 .34) for the polymers were obtained. The orientation of the monomers at the photopolymerization temperature was almost fixed, such that An and the ord er parameter of the polymers varied with the polymerization temperature.