C-13 NUCLEAR-MAGNETIC-RESONANCE STUDIES OF CELLULOSE ESTER DERIVATIVES IN SOLUTION, POWDER AND MEMBRANES

被引：16

作者：

NUNES, T ^{[1
]}

BURROWS, HD ^{[1
]}

BASTOS, M ^{[1
]}

FEIO, G ^{[1
]}

GIL, MH ^{[1
]}

机构：

[1] UNIV COIMBRA,DEPT QUIM & BIOQUIM,P-3049 COIMBRA,PORTUGAL

来源：

POLYMER | 1995年 / 36卷 / 03期

关键词：

CELLULOSE ESTERS; C-13; NMR; CHEMICAL SHIFT ANISOTROPY;

D O I：

10.1016/0032-3861(95)91556-M

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

A C-13 nuclear magnetic resonance study (with cross polarization and magic angle spinning) is presented of commercially available cellulose acetate and cellulose propionate as powder samples and also in different membranes. Some physical properties of the films are interpreted in the light of data obtained for the principal components of the shielding tenser of C-13 nuclei on carbonyl groups. In particular, it is shown that the shielding asymmetry factor, measured on samples with a regular shape and with a fixed orientation in the rotor, is a sensitive probe to ordered domains in the polymers.

引用

页码：479 / 485

页数：7

共 11 条

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