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Formation of Microporous Films via Pattern Photo-Polymerization Induced Phase Separation

Published online by Cambridge University Press:  15 March 2011

Scott Meng ,
Domasius Nwabunma  and
Thein Kyu
Scott Meng
Affiliation:
Institute of Polymer EngineeringThe University of Akron, Akron, OH 44325
Domasius Nwabunma
Affiliation:
Institute of Polymer EngineeringThe University of Akron, Akron, OH 44325
Thein Kyu*
Affiliation:
Institute of Polymer EngineeringThe University of Akron, Akron, OH 44325
*
Corresponding author: tkyu@uakron.edu CC6.6.1
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Extract

We describe a method of fabricating microporous films through pattern photopolymerization induced phase separation in a mixture of solvent/monomer using multi-wave mixing, i.e., four-wave mixing through interference of two horizontal and two vertical waves. The simulation on the microporous forming process was undertaken in the framework of the time-dependent Ginzburg-Landau (TDGL) Model B equations coupled with the reaction kinetic equation of photopolymerization. In the total free energy description, Flory-Huggins free energy of mixing was combined with the elastic free energy of the network. The calculated results showed that the microporous size, shape, and spacing of the micropores depend on the angle of interference and the reaction rate controlled by the incident UV intensity.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 709: Symposium CC – Advances in Liquid Crystalline Materials and Technologies , 2001 , CC6.6.1
Copyright
Copyright © Materials Research Society 2002

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