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Titolo:
SYNTHESIS AND PHASE-BEHAVIOR OF AZO-DYE CONTAINING LIQUID-CRYSTALLINEPOLYORGANOSILOXANE
Autore:
ZHUO RX; ZHANG XL; LUO ZH;
Indirizzi:
WUHAN UNIV,DEPT CHEM WUHAN 430072 PEOPLES R CHINA
Titolo Testata:
Pure and applied chemistry
fascicolo: 6-7, volume: A30, anno: 1993,
pagine: 433 - 440
SICI:
0033-4545(1993)A30:6-7<433:SAPOAC>2.0.ZU;2-P
Fonte:
ISI
Lingua:
ENG
Soggetto:
POLYMERS; COPOLYMERS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
11
Recensione:
Indirizzi per estratti:
Citazione:
R.X. Zhuo et al., "SYNTHESIS AND PHASE-BEHAVIOR OF AZO-DYE CONTAINING LIQUID-CRYSTALLINEPOLYORGANOSILOXANE", Pure and applied chemistry, A30(6-7), 1993, pp. 433-440

Abstract

A series of liquid crystalline polyorganosiloxanes containing both azo dye and cholesteryl groups were synthesized by reacting roformylpropyl)methylsiloxane-co-dimethylsiloxane] with both cholesterol and 4-(4'-methoxyphenylazo)phenol. The yields were between 73 and 81%. Most of these new polyorganosiloxanes are colored solid products. Their chemical structures were confirmed by IR, H-1 NMR, and elemental analysis. Their phase behaviors were also investigated by using differential scanning calorimetry (DSC) and polarizing microscopy. The results show that all these polyorganosiloxanes exhibit liquid crystalline behavior atvarious temperatures and at any azo dye content. As a result of the orientation of both mesogenic azo dye and cholesteryl groups, smectic phases were formed beginning around 0-degrees-C, and cholesteric phasesappeared above 60-degrees-C.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 07/07/20 alle ore 21:47:34