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Titolo:
Optical anisotropy of chalcone-based epoxy compound under irradiation of linearly polarized UV light
Autore:
Choi, DH; Cha, YK;
Indirizzi:
Kyung Hee Univ, Coll Environm & Appl Chem, Inst Nat Sci, Mat Ctr Informat Display, Yongin 449701, Kyungki, South Korea Kyung Hee Univ Yongin KyungkiSouth Korea 449701 01, Kyungki, South Korea
Titolo Testata:
POLYMER
fascicolo: 3, volume: 43, anno: 2002,
pagine: 703 - 710
SICI:
0032-3861(200202)43:3<703:OAOCEC>2.0.ZU;2-#
Fonte:
ISI
Lingua:
ENG
Soggetto:
NEMATIC LIQUID-CRYSTALS; CATIONIC PHOTOPOLYMERIZATION; AZOBENZENE GROUPS; THIN-FILMS; ALIGNMENT; POLYMERS; SURFACE; DISPLAYS;
Keywords:
optical anisotropy; chalcone-epoxy; photochemical reactions;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
33
Recensione:
Indirizzi per estratti:
Indirizzo: Choi, DH Kyung Hee Univ, Coll Environm & Appl Chem, Inst Nat Sci, Mat Ctr Informat Display, 1 Seocheon, Yongin 449701, Kyungki, South Korea Kyung HeeUniv 1 Seocheon Yongin Kyungki South Korea 449701 Korea
Citazione:
D.H. Choi e Y.K. Cha, "Optical anisotropy of chalcone-based epoxy compound under irradiation of linearly polarized UV light", POLYMER, 43(3), 2002, pp. 703-710

Abstract

Photocrosslinkable chalcone-epoxy compound comprising 1,3-bis-(4-hydroxy-phenyl)-propenone was synthesized for studying the optically induced anisotropy of the thin films. Chalcone group was introduced into the main chain unit of the epoxy oligomer. We observed a photodimerization behavior and an optical anisotropy of this material by irradiation of linearly polarized UV light (LPL). With a trace amount of cationic photoinitiator, polymerizationof epoxy groups was also conducted at the similar wavelength range used for photodimerization. Optical anisotropy of the thin film was also investigated by using polarized FT-IR and UV absorption spectroscopy either with or without cationic photoinitiator. Two kinds of photochemical reaction were employed to enhance the anisotropy using the chalcone-epoxy compound. (C) 2001 Elsevier Science Ltd. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 06/07/20 alle ore 05:32:17