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Titolo:
SYNTHESIS AND PHASE-BEHAVIOR OF 1,3-BIS-( MESOGENES)-1,1,3,3-TETRA METHYLDISILOXANES
Autore:
ZHANG XL; ZHANG JQ; WANG CR; ZHUO RX;
Indirizzi:
WUHAN UNIV,DEPT CHEM WUHAN 430072 PEOPLES R CHINA
Titolo Testata:
Gaodeng xuexiao huaxue xuebao
fascicolo: 3, volume: 16, anno: 1995,
pagine: 471 - 476
SICI:
0251-0790(1995)16:3<471:SAPO1M>2.0.ZU;2-1
Fonte:
ISI
Lingua:
CHI
Soggetto:
LIQUID-CRYSTAL POLYMERS;
Keywords:
LIQUID CRYSTALLINE; SILOXANE; SYNTHESIS; PHASE BEHAVIOR; AZOBENZENE;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
10
Recensione:
Indirizzi per estratti:
Citazione:
X.L. Zhang et al., "SYNTHESIS AND PHASE-BEHAVIOR OF 1,3-BIS-( MESOGENES)-1,1,3,3-TETRA METHYLDISILOXANES", Gaodeng xuexiao huaxue xuebao, 16(3), 1995, pp. 471-476

Abstract

Sixteen 1,3-bis-(mesogens)-1,1,3,3-tetramethyl disiloxanes(I-a,I-b, IIa-g, IIIj, IVa-f) were synthesized. Their chemical structures were confirmed by H-1 NMR , IR, UV and elemental analysis. Their phase behaviors were also investigated by using differential scanning calorimeter(DSC) and polarizing microscope. The results show that twelve compoundsexhibit the liquid crystalline (LC) plase transition temperatures except four compounds(IIa,b, IIId, IVd). X-ray diffraction has been used to investigate the crystal structure of 4-methylazobenzene-oxy-methyl)-1,1,3,3-tetramethyl disiloxane( IIa). The influence of chemical structures of these novel siloxane compounds on LC phage behaviors were discussed.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 13/07/20 alle ore 16:59:40