Investigations of the effect of viscosity of resin on the diffusion of pyrene in silicone polymer coatings using steady state fluorescence technique

被引：13

作者：

Anandan, C ^{[1
]}

Basu, BJ ^{[1
]}

Rajam, KS ^{[1
]}

机构：

[1] Natl Aerosp Labs, Surface Engn Div, Bangalore 560017, Karnataka, India

来源：

EUROPEAN POLYMER JOURNAL | 2004年 / 40卷 / 02期

关键词：

pyrene; silicone coatings; diffusion coefficient; fluorescence;

D O I：

10.1016/j.eurpolymj.2003.10.002

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

The diffusion phenomenon of pyrene in silicone coatings prepared from various commercial silicone resins with different viscosities was investigated using steady state excimer fluorescence technique. The amount of pyrene lost from the coatings by diffusion at different temperatures ranging from 25 to 70 degreesC was estimated from the excimer emission intensity. The diffusion coefficients (D) and activation energy of diffusion of pyrene in silicone coatings were determined. It was found that the kinetic parameters of pyrene were comparable in all the four silicone coatings and independent of the viscosity of the resin. The D values were lower than those expected for pyrene in PDMS resins in the corresponding viscosity range. This may be attributed to restricted mobility of pyrene due to cross-linking of polymer chains in the cured silicone coatings. (C) 2003 Elsevier Ltd. All rights reserved.

引用

页码：335 / 342

页数：8

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