H-1 CRAMPS spectra of poly(vinyl alcohol) films with different tacticities

被引：20

作者：

Horii, F

Hu, SH

Deguchi, K

Sugisawa, H

Ohgi, H

Sato, T

机构：

[1] JEOL LTD, AKISHIMA, TOKYO 196, JAPAN

[2] KURARAY CO, CENT RES LABS, KURASHIKI, OKAYAMA 710, JAPAN

来源：

MACROMOLECULES | 1996年 / 29卷 / 09期

关键词：

D O I：

10.1021/ma9516908

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

1H CRAMPS (combined rotation and multiple pulse spectroscopy) spectra have successfully been measured for poly(vinyl alcohol) films with different tacticities. The OH resonance line is well resolved by the curve fitting method, although it is considerably superposed on the adjacent CH resonance line. The chemical shift and the line width thus obtained for the OH line significantly depend on the mm fraction, suggesting the concomitant change in fractions of intramolecular and intermolecular hydrogen bonds. Although the contributions from the crystalline and noncrystalline regions cannot be separately observed below Tg, those resonance lines are well resolved above Tg due to the upfield shift and line narrowing for the noncrystalline component.

引用

页码：3330 / 3331

页数：2

共 14 条

[1]

[Anonymous], 1970, J POLYM SCI, DOI DOI 10.1002/POLC.5070310108

[2] CRYSTAL STRUCTURE OF POLYVINYL ALCOHOL [J].