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IJSTR >> Volume 1 - Issue 1, February 2012 Edition



International Journal of Scientific & Technology Research  
International Journal of Scientific & Technology Research

Website: http://www.ijstr.org

ISSN 2277-8616



Non-Fickian Drying of Polymeric Coatings

[Full Text]

 

AUTHOR(S)

Raj Kumar Arya

 

KEYWORDS

Confocal Raman Spectroscopy, Non-Fickian Drying, Rubbery Coating, Glass Coatings, Binary Coatings, Thin Films

 

ABSTRACT

Concentration profiles in two binary polymeric coatings - poly (styrene)- p-xylene and poly (methyl methacrylate) - ethylbenzene, have been measured using confocal laser Raman spectroscopy. Measured profiles are very different from as shown earlier for rubbery coatings. Sigmoidal profiles are observed in these polymeric coatings during the course of drying because they went through the glass transition temperature. Fick's law of diffusion is inadequate to explain such type of diffusion.

 

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