DIFFUSION AND DEUTERON NUCLEAR-MAGNETIC-RESONANCE STUDY OF THE DISTRIBUTION OF WATER-MOLECULES IN POLYIMIDE FILMS

被引：17

作者：

LI, SZ ^{[1
]}

PAK, YS ^{[1
]}

ADAMIC, K ^{[1
]}

GREENBAUM, SG ^{[1
]}

LIM, BS ^{[1
]}

XU, G ^{[1
]}

NOWICK, AS ^{[1
]}

机构：

[1] COLUMBIA UNIV,SCH ENGN,NEW YORK,NY 10027

来源：

JOURNAL OF THE ELECTROCHEMICAL SOCIETY | 1992年 / 139卷 / 03期

关键词：

D O I：

10.1149/1.2069281

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

The nature and distribution of water molecules in polyimide (KAPTON) films of varying thickness is studied by diffusion and deuteron (H-2) nuclear magnetic resonance spectroscopy with complementary studies of IR absorption and differential scanning calorimetry. The results supports the conclusion, drawn from a previous study, that water exists in two distinct sites called gamma(1) and gamma(2), neither of which is strongly bound to the host polymer nor is isotropically free. The water molecules in the gamma(1) site are distributed uniformly throughout the volume of the film, while those in the gamma(2) site (which are filled only at higher values of relative humidity) appear to be in small molecular clusters.

引用

页码：662 / 667

页数：6

共 18 条

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[2]

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[3]

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