F-19 NMR INVESTIGATION OF AROMATIC AMIC ACID AND IMIDE MODEL COMPOUNDS .1.

被引：9

作者：

SMITH, CD ^{[1
]}

MERCIER, R ^{[1
]}

WATON, H ^{[1
]}

SILLION, B ^{[1
]}

机构：

[1] CNRS,IFP,UMR 102,BP 3,F-69390 VERNAISON,FRANCE

来源：

POLYMER | 1993年 / 34卷 / 23期

关键词：

POLYIMIDES; MODEL COMPOUNDS; F-19; NMR;

D O I：

10.1016/0032-3861(93)90009-Y

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Several fluorinated aromatic amic acid and imide model compounds and their intermediates were prepared and investigated in N-methylpyrrolidinone by F-19 and C-13 n.m.r. Starting materials included 4-fluoroaniline, 3-fluorophthalic anhydride, 2,2-bis(3,4-carboxyphenyl)hexafluoropropane dianhydride and 2,2-bis(4-aminophenyl)hexafluoropropane. The advantages of F-19 n.m.r. for studying amic acid and imide chemistry were numerous. Anhydride and amine starting materials, as well as amic acid, isoimide and imide compounds, were easily identified in the F-19 n.m.r. spectra. Isomeric contents of amic acid mixtures were directly measurable. Many unique aspects of polyimide chemistry, such as amic acid equilibria and imide interchange reactions, could be quantitatively identified. Data from C-13 n.m.r. and F-19 n.m.r. were related in many cases, as were the carbon-fluorine coupling constants.

引用

页码：4852 / 4862

页数：11

共 57 条

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[2]

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