1H spill diffusion in PMLG/PVP blends as studied by CP/MAS 13C NMR

被引：10

作者：

Asano, A ^{[1
]}

Kurotu, T ^{[1
]}

机构：

[1] Natl Def Acad, Dept Chem, Yokosuka, Kanagawa 239, Japan

来源：

JOURNAL OF MOLECULAR STRUCTURE | 1998年 / 441卷 / 2-3期

关键词：

polymer blend; CP/MAS C-13 NMR; poly(gamma-methyl-L-glutamate); poly(vinylpyrrolidone);

D O I：

10.1016/S0022-2860(97)00252-4

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The effect of H-1 spin diffusion on the relaxation process in poly(gamma-methyl-L-glutamate)/poly(vinylpyrrolidone) (PMLG/PVP) blends has been studied by CP/MAS C-13 NMR spectroscopy. The domain sizes of PMLG/PVP blends have been estimated. The 70/30 PMLG/PVP blend is found to be homogeneous on a scale of 10-20 nm from the examination of H-1 relaxation, while the other blends are heterogeneous on that scale. The Goldman-Shen experiment combined with the CP/MAS C-13 NMR technique provides information on the mean width of PMLG domain in the PMLG/PVP blends. The mean width of PMLG domain in the 70/30 PMLG/PVP blend is estimated to be about 6.8 nm. (C) 1998 Elsevier Science B.V.

引用

页码：129 / 135

页数：7

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