A NEW TECHNIQUE TO QUANTIFY OXYGEN DIFFUSION IN POLYMER-FILMS

被引：28

作者：

GAO, YP ^{[1
]}

OGILBY, PR ^{[1
]}

机构：

[1] UNIV NEW MEXICO,DEPT CHEM,ALBUQUERQUE,NM 87131

来源：

MACROMOLECULES | 1992年 / 25卷 / 19期

关键词：

D O I：

10.1021/ma00045a023

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Diffusion coefficients for oxygen in polymer films are quickly and accurately obtained by using a near-infrared luminescence spectrometer. The spectroscopic technique described herein uses the 1270-nm phosphorescence of singlet molecular oxygen (1-DELTA(g)O2 --> 3-SIGMA(g)O2) to directly monitor oxygen sorption into polymer films (15-80-mu-m thick) of small area (approximately 1 cm x 1 cm). The approach is illustrated by using films of polystyrene for which a 25-degrees-C diffusion coefficient of (2.3 +/- 0.3) X 10(-7) cm2/s is obtained.

引用

页码：4962 / 4966

页数：5

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[2]

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[3]

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