The enhancement of weakly exothermic polymerization fronts |
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Authors: | D M G Comissiong L K Gross V A Volpert |
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Affiliation: | (1) Center for Mathematics, University of Coimbra, Apartado 3008, 3001-454 Coimbra, Portugal;(2) Department of Theoretical and Applied Mathematics, The University of Akron, Akron, OH 44325-4002, USA;(3) Department of Engineering Sciences and Applied Mathematics, Northwestern University, Evanston, IL 60208-3125, USA |
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Abstract: | The propagation of one-dimensional waves resulting from chemical reactions in a sandwich-type two-layer setting is considered.
One layer, termed the polymerization layer, contains the monomer and initiator molecules needed for the initiation of a self-propagating
polymer front. The other layer will be referred to as the enhancement layer, and it contains the necessary reactants to support
a highly exothermic self-propagating reaction wave. Heat exchange occurs between the layers, and as a result, there is a net
diffusion of heat away from the region undergoing the more exothermic reaction. As frontal polymerization (FP) reactions are
known not to be very exothermic, an overall transfer of heat from the enhancement layer into the polymerization layer takes
place. An analysis of the basic state of the system is carried out to investigate the effect of heat transfer on the polymerization
reaction. An enhancement layer is shown to promote FP. This analysis is applicable to the manufacture of thin polymer films
by FP. |
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Keywords: | Enhancement layer Frontal polymerization Free-radical polymerization Mathematical model Traveling wave |
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