Azobenzene-polymer-stabilized ferroelectric liquid crystals: photoalignment and morphology

2003 ◽  
Author(s):  
Yue Zhao ◽  
Nadine Paiement ◽  
Sonia Sevigny ◽  
Steve LeClair ◽  
Shahrokh Motallebi ◽  
...  
Keyword(s):  
Liquid Crystals ◽  
Ferroelectric Liquid Crystals ◽  
Azobenzene Polymer ◽  
Polymer Stabilized

Azobenzene polymer stabilized ferroelectric liquid crystals: simultaneous photopolymerization and photoalignment

2005 ◽  
Vol 32 (5) ◽  
pp. 599-607 ◽  
Author(s):  
Sonia Sévigny ◽  
Luc Bouchard ◽  
Shahrokh Motallebi ◽  
Yue Zhao
Keyword(s):  
Liquid Crystals ◽  
Ferroelectric Liquid Crystals ◽  
Azobenzene Polymer ◽  
Polymer Stabilized

New photoactive polymer and liquid-crystal materials

2004 ◽  
Vol 76 (7-8) ◽  
pp. 1499-1508 ◽  
Author(s):  
Yue Zhao
Keyword(s):  
Liquid Crystal ◽  
Liquid Crystals ◽  
Self Assembly ◽  
Diffraction Gratings ◽  
Thermoplastic Elastomers ◽  
Side Chain ◽  
Ferroelectric Liquid Crystals ◽  
Azobenzene Polymer ◽  
Photoactive Materials ◽  
Polymer Stabilized

The reversible trans–cis photoisomerization of azobenzene and azopyridine chromophore was used to design and exploit novel photoactive materials based on polymers and liquid crystals. This paper reviews our recent studies on several systems. These include azobenzene-containing thermoplastic elastomers that can be used to prepare mechanically tunable diffraction gratings, side-chain azopyridine polymers for combined self-assembly and photoactivity, azobenzene polymer-stabilized ferroelectric liquid crystals whose bulk alignment can be achieved by light with no need for surface orientation layers, and, finally, self-assembled photoactive liquid-crystal gels that can display light-induced reorganization leading to the formation of electrically switchable diffraction gratings.

Polymerization and Properties of Polymer-Stabilized Ferroelectric Liquid Crystals

MRS Bulletin ◽  
1997 ◽  
Vol 22 (9) ◽  
pp. 15-20 ◽  
Author(s):  
Christopher N. Bowman ◽  
C. Allan Guymon
Keyword(s):  
Liquid Crystals ◽  
Liquid Crystalline ◽  
Scanning Calorimetry ◽  
Ferroelectric Liquid Crystals ◽  
University Of Colorado ◽  
Crystalline Environment ◽  
Polarized Infrared Spectroscopy ◽  
The Many ◽  
The University ◽  
Polymer Stabilized

The following is based on the presentation made by Christopher N. Bowman, recipient of the MRS Outstanding Investigator Award, at the 1997 MRS Spring Meeting.I would like to focus on our recent work involving photopolymerizations of monomers in a liquid-crystalline environment. This work is one of the many aspects of photopolymerizations that we are focusing on at the University of Colorado. In particular this effort concentrates on understanding the influence of a liquid-crystalline medium and monomer segregation on polymerization behavior and polymer structure. These studies are of considerable importance for polymer-stabilized ferroelectric liquid crystals (FLCs) because of the enormous potential impact on the area.I will briefly introduce liquid crystals (LCs), FLCs, and photopolymerizations. I will then discuss the observed electrooptic properties and how these properties change as the LC phase during polymerization is varied. Finally I will address how polymerization kinetics are affected by the LC phase and monomer segregation. This discussion will include results from x-ray diffraction, polarized infrared spectroscopy, and differential scanning calorimetry experiments.

Field Sequential Full Color LCDs using Polymer-stabilized V-shaped Ferroelectric Liquid Crystals

2008 ◽  
Vol 364 (1) ◽  
pp. 78-85 ◽  
Author(s):  
Toru Fujisawa ◽  
Isa Nishiyama ◽  
Kazuaki Hatsusaka ◽  
Kiyofumi Takeuchi ◽  
Haruyoshi Takatsu ◽  
...  
Keyword(s):  
Liquid Crystals ◽  
Ferroelectric Liquid Crystals ◽  
Full Color ◽  
Polymer Stabilized
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