AN NMR IMAGING STUDY OF METHANOL DESORPTION FROM PARTIALLY SWOLLEN PMMA RODS

被引：42

作者：

WEISENBERGER, LA ^{[1
]}

KOENIG, JL ^{[1
]}

机构：

[1] CASE WESTERN RESERVE UNIV,DEPT MACROMOLEC SCI,CLEVELAND,OH 44106

来源：

MACROMOLECULES | 1990年 / 23卷 / 09期

关键词：

D O I：

10.1021/ma00211a008

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

This NMR imaging investigation shows several previously undetected features of methanol desorption from PMMA. The desorption is characterized by decreases in signal intensities in the images and by changes in calculated images representing time constants for exponential intensity decays from several magnitude images. Three regions in the partially swollen polymer show widely varying desorption characteristics, the surface region, the region surrounding the glassy core, and the bulk region between them. The apparent controlling feature of the desorption process at any point is the polymer segmental motions restricting the solvent mobility. © 1990, American Chemical Society. All rights reserved.

引用

页码：2454 / 2459

页数：6

共 28 条

[1] NMR IMAGING [J].

ANDREW, ER .

ACCOUNTS OF CHEMICAL RESEARCH, 1983, 16 (04) :114-122

[2]

BAILES DR, 1984, CONTEMP PHYS, V24, P441

[3] DIFFUSION IN LIQUID SOLID SYSTEMS BY NMR IMAGING [J].

BLACKBAND, S ;

MANSFIELD, P .

JOURNAL OF PHYSICS C-SOLID STATE PHYSICS, 1986, 19 (02) :L49-L52

[4] CHEMICAL-SHIFT IMAGING - A REVIEW [J].

BRATEMAN, L .

AMERICAN JOURNAL OF ROENTGENOLOGY, 1986, 146 (05) :971-980

[5] NMR CHEMICAL-SHIFT IMAGING IN 3 DIMENSIONS [J].

BROWN, TR ;

KINCAID, BM ;

UGURBIL, K .

PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA-BIOLOGICAL SCIENCES, 1982, 79 (11) :3523-3526

[6] NUCLEAR MAGNETIC-RESONANCE TECHNOLOGY FOR MEDICAL STUDIES [J].

BUDINGER, TF ;

LAUTERBUR, PC .

SCIENCE, 1984, 226 (4672) :288-298

[7] EFFECTS OF DIFFUSION ON FREE PRECESSION IN NUCLEAR MAGNETIC RESONANCE EXPERIMENTS [J].

CARR, HY ;

PURCELL, EM .

PHYSICAL REVIEW, 1954, 94 (03) :630-638

[8] OBSERVATION OF POLYBUTADIENE RUBBER STRUCTURE USING NMR IMAGING [J].

CLOUGH, RS ;

KOENIG, JL .

JOURNAL OF POLYMER SCIENCE PART C-POLYMER LETTERS, 1989, 27 (11) :451-454

[9]

DOWNES JG, 1959, J POLYM SCI, V36, P130

[10]

Fox TG, 1956, B AM PHYS SOC, V1, P123

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