SYNTHESIS AND PRELIMINARY CHARACTERIZATION OF A NEW FULLY AROMATIC MESOGENIC POLYESTER CONTAINING A 2-PHENYLBENZOXAZOLE GROUP

被引：31

作者：

CARUSO, U ^{[1
]}

CENTORE, R ^{[1
]}

ROVIELLO, A ^{[1
]}

SIRIGU, A ^{[1
]}

机构：

[1] UNIV NAPOLI FEDERICO 2,DIPARTIMENTO CHIM,VIA MEZZOCANNONE 4,I-80134 NAPLES,ITALY

来源：

MACROMOLECULES | 1992年 / 25卷 / 09期

关键词：

D O I：

10.1021/ma00035a002

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

The synthesis of a new fully aromatic thermotropic polyester obtained by reaction of terephthalic acid and 2-[4-(acetyloxy)phenyl]-6-(acetyloxy)benzoxazole is described. A preliminary characterization of the polymer is reported, based on DSC, TGA, X-ray diffraction analysis, optical observations, and dynamic mechanical thermal analysis. The polymer as prepared is a semicrystalline material, with a glass transition of 181-degrees-C, that melts at 408-degrees-C to give a liquid crystal phase of probable nematic nature. Relevant chemical decomposition takes place in the temperature range 510-620-degrees-C. A remarkable crystallinity has been observed also in samples obtained by cooling the liquid crystal phase. Fibers were obtained by melt extrusion which show a high degree of macroscopic orientation.

引用

页码：2290 / 2293

页数：4

共 17 条

[1]

ARNOLD C, 1979, MACROMOL REV, V14, P265

[2]

BALLAUFF M, 1986, MAKROMOL CHEM-RAPID, V7, P407

[3] 4-(4'-AMINOBENZENESULPHONAMIDO)RESORCINOL 3-BENZOATE AND SOME RELATED COMPOUNDS [J].

BARTON, DHR ;

LINNELL, WH ;

SENIOR, N .

JOURNAL OF THE CHEMICAL SOCIETY, 1945, (MAY) :436-438

[4]

BILIBIN AY, 1985, MAKROMOL CHEM, V186, P1575

[5] A COMPARATIVE-STUDY OF MESOGENIC STRUCTURES - THE CRYSTAL-STRUCTURES OF BIS[(4-BUTOXYCARBONYL)-PHENYL]TEREPHTHALATE AND BIS[(4-VALEROYLOXY)-PHENYL]TEREPHTHALATE [J].

CENTORE, R ;

CIAJOLO, MR ;

ROVIELLO, A ;

SIRIGU, A ;

TUZI, A .

LIQUID CRYSTALS, 1991, 9 (06) :873-882

[6] SYNTHESIS AND SOLUTION PROPERTIES OF EXTENDED CHAIN POLY(2,6-BENZOTHIAZOLE) AND POLY(2,5-BENZOXAZOLE) [J].

CHOW, AW ;

BITLER, SP ;

PENWELL, PE ;

OSBORNE, DJ ;

WOLFE, JF .

MACROMOLECULES, 1989, 22 (09) :3514-3520

[7] CYCLOMETALATION OF 2-PARA-TOLYLBENZTHIAZOLE AND 2-PARA-TOLYLBENZOXAZOLE WITH PALLADIUM(II) ACETATE - SYNTHESIS AND CRYSTAL-STRUCTURES OF THE ACETATE-BRIDGED DIMERS [(MEC6H3C7H4NS)PD]2(MU-O2CME)2 AND [(MEC6H3C7H4NO)PD]2(MU-O2CME)2 [J].

CHURCHILL, MR ;

WASSERMAN, HJ ;

YOUNG, GJ .

INORGANIC CHEMISTRY, 1980, 19 (03) :762-770

[8]

IMAI Y, 1965, MAKROMOLEKUL CHEM, V83, P179

[9]

Jackson W. J., 1980, BR POLYM J, V12, P154

[10]

KAUFFMANN H, 1911, BER DTSCH CHEM GES, V44, P754

← 1 2 →