NEMATOGENIC BLOCK COPOLYMERS OF RIGID AND FLEXIBLE AROMATIC UNITS .3. ADDITIONAL PHASE-EQUILIBRIA STUDIES

被引：8

作者：

BIANCHI, E

CIFERRI, A

CONIO, G

TEALDI, A

KRIGBAUM, WR

PRESTON, J

机构：

[1] UNIV GENOA,CNR,CTR MACROMOLEC,I-16132 GENOA,ITALY

[2] DUKE UNIV,DEPT CHEM,DURHAM,NC 27706

来源：

POLYMER JOURNAL | 1988年 / 20卷 / 01期

关键词：

POLYAMIDES - Phase Equilibria;

D O I：

10.1295/polymj.20.83

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 mesophase behavior of block copolymers composed of rigid poly(p-benzamide) (PBA) and the flexible polyterephthalamide of p-aminobenzhydrazide (PABH-T) (80:20, w/w) was investigated using N,N-dimethylacetamide (DMAc) plus 3% LiCl as a solvent. These copolymers include a fraction soluble in dimethyl sulfoxide (DMSO) which was attributed to oligomers and polymers rich in PABH-T. The variation of the volume fraction of the isotropic phase with overall composition within the biphasic gap is more complex than previously observed. As a result, a single anisotropic phase cannot be observed. The flexible component soluble in DMSO is partitioned between the conjugated phases, apparently violating the incompatibility between rigid and flexible polymers in the mesophase.

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页码：83 / 91

页数：9

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