Photoinduced Alignment of Ferroelectric Liquid Crystals Using Azobenzene Polymer Networks of Polyethers and Polyepoxides

Autor:	Yue Zhao, Luc Bouchard, Sonia Sevigny, Shahrokh Motallebi
Rok vydání:	2003
Předmět:	Azo compound Polymers and Plastics Photoisomerization Chemistry Organic Chemistry Cationic polymerization Photochemistry Ring-opening polymerization Cis trans isomerization Inorganic Chemistry chemistry.chemical_compound Photopolymer Azobenzene Liquid crystal Polymer chemistry Materials Chemistry
Zdroj:	Macromolecules. 36:9033-9041
ISSN:	1520-5835 0024-9297
Popis:	Several divinyl ether and diepoxide monomers bearing an azobenzene moiety were synthesized and used to investigate the photoalignment of a ferroelectric liquid crystal (FLC) with no use of surface orientation layers. Azobenzene polymer networks, obtained by cationic polymerization of the monomers dissolved in the FLC host and exposed to linearly polarized irradiation, were found to be able to induce and stabilize a bulk alignment of FLC. Photoinduced reorientation of the FLC can also be achieved by changing the polarization of irradiation light, but in contrast with the use of chiral azobenzene poly(meth)acrylates,1 the results suggest a mechanism based on the formation of an anisotropic azobenzene polyether or polyepoxide network for the commanding effect on the FLC alignment.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::b527f09a6fd3f39e023405eed270fcfd https://doi.org/10.1021/ma034885l Zobrazit plný text záznamu