A NOVEL ORIENTATION MATERIAL FOR LIQUID-CRYSTALS BASED ON MODIFIED LADDER-LIKE POLYSILOXANES

Authors
TANG YX CUI L XIE P ZHANG RB ZHANG ZY WAN BQ
Citation
Yx. Tang et al., A NOVEL ORIENTATION MATERIAL FOR LIQUID-CRYSTALS BASED ON MODIFIED LADDER-LIKE POLYSILOXANES, Macromolecular chemistry and physics, 198(11), 1997, pp. 3377-3384
Citations number
28
Categorie Soggetti
Polymer Sciences
Journal title
Macromolecular chemistry and physics → ACNP
ISSN journal
10221352
Volume
198
Issue
11
Year of publication
1997
Pages
3377 - 3384
Database
ISI
SICI code
1022-1352(1997)198:11<3377:ANOMFL>2.0.ZU;2-U
Abstract
A new orientation material for liquid crystals (LCs) based on modified ladder-like polysiloxanes (LPSs) is investigated. The curing temperat ure (150-200 degrees C) of these grafted LPSs is much lower than that of the traditionally used polyimides (PIs) (250-300 degrees C). The pr e-tilt angles of a nematic liquid crystal (LC), 4-pentyl-4'-cyanobiphe nyl (5CB), are between 2-8 degrees, depending on the rubbing condition s and the side chains. Annealing experiments at 100 degrees C and 180 degrees C demonstrated that the stability of these orientation films i s quite well.