Cooperativity in backbone to side-chain conformational rearrangements in stereoregular PMMA

被引：35

作者：

Grohens, Y

Prud'homme, RE ^{[1
]}

Schultz, J

机构：

[1] Univ Laval, Dept Chim, St Foy, PQ G1K 7P4, Canada

[2] Univ Laval, Ctr Rech Sci & Ingn Macromol, St Foy, PQ G1K 7P4, Canada

[3] CNRS, Inst Chim Surfaces & Interfaces, F-68057 Mulhouse, France

来源：

MACROMOLECULES | 1998年 / 31卷 / 08期

关键词：

D O I：

10.1021/ma961913+

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 infrared multiple absorption bands in the 1300-1100 cm(-1) range, attributed to the v(a)(C-C-O) vibration of PMMA, and the carbonyl shift of the solid-state NMR spectra, have been analyzed in terms of conformational restrictions. The Av(2)/Av(1) infrared ratio, calculated from the absorbances of vl (at 1260-1275 cm(-1)) and vs (at 1240 cm(-1)), is found to give the ratio of the backbone conformational energy relative to the overall energy of the chain segment. From this ratio, it is suggested that there are cooperative motions between the backbone and the side chain in i-PMMA, but not in s-PMMA.

引用

页码：2545 / 2548

页数：4

共 12 条

[1]

Bovey F. A., 1969, POLYM CONFORMATION C

[2] ACID-BASE COMPLEXES OF POLYMERS [J].