PMMA conformational changes on gamma-alumina powder: Influence of the polymer tacticity on the configuration of the adsorbed layer

被引：21

作者：

Grohens, Y ^{[1
]}

Schultz, J ^{[1
]}

Prudhomme, RE ^{[1
]}

机构：

[1] UNIV LAVAL,CTR RECH SCI & INGN MACROMOL,ST FOY,PQ G1K 7P4,CANADA

来源：

INTERNATIONAL JOURNAL OF ADHESION AND ADHESIVES | 1997年 / 17卷 / 02期

关键词：

PMM; aluminium and alloys; NMR; infrared spectra; adhesion by chemical bonding;

D O I：

10.1016/S0143-7496(96)00035-8

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

Stereoregular PMMAs have been adsorbed from solution on gamma-alumina and studied by diffuse reflectance infrared (DRIFT) and solid state C-13 NMR. Infrared has shown the fraction of surface bonded carbonyl (f((c=0))(ab)) is higher for the adsorbed isotactic PMMA than for the syndiotactic form. The shift of the infrared upsilon(a)(C-O-CH3) may indicate that the methoxy functional group also interacts with the surface. From NMR spectroscopy, the changes in methylene carbon chemical shift, due to a lowering in the gamma-gauche effect, are more pronounced for isotactic PMMA than for the syndiotactic form. The results agree with the assumption of a flattened conformation of adsorbed isotactic chains while atactic and syndiotactic chains are adsorbed more loosely. (C) 1997 Elsevier Science Ltd.

引用

页码：163 / 167

页数：5

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