THE EFFECT OF MOLECULAR-SIZE ON NON-FICKIAN SORPTION IN GLASSY-POLYMERS

被引：30
|
作者：
MILLS, PJ [1 ]
KRAMER, EJ [1 ]
机构：
[1] CORNELL UNIV,CTR MAT SCI,ITHACA,NY 14850
来源：
JOURNAL OF MATERIALS SCIENCE | 1986年 / 21卷 / 12期
关键词：
ORGANIC COMPOUNDS - Diffusion - POLYMETHYL METHACRYLATE - Amorphous;
D O I：
10.1007/BF01106522
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Rutherford backscattering spectrometry has been used to determine the concentration against depth profiles of n-iodoalkanes diffusing into a polymer glass photoresist. All the iodoalkanes smaller than iodohexane show strongly non-Fickian diffusion. After an induction time a sharp front forms, with almost no concentration gradient behind the front. Ahead of the front the concentration decreases exponentially with depth, a form predicted for Fickian diffusion ahead of a moving boundary. The polymer investigated was a commercial dry film photoresist, Riston. Its nominal chemical composition is close to that of polymethylmethacrylate.
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页码：4151 / 4156
页数：6
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