Interactions of Mixing, Diffusion and Reaction in Fast Step Growth Polymerizations

Yein MING Lee, L. James Lee

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

A mathematical model based on a slab configuration is employed to simulate fast step growth polymerizations. The effect of mixing pattern, molecular diffusivity, and catalysl concentration on the conversion profile is studied for reaction systems with different gel conversions. The results, which can be explained by the intensity and the scale of segregation, provide some conceptual guidelines in designing appropriate mixing methods for fast step growth polymerizations. The distribution of slab thickness and the benefit of using cascade impingement mixing in the reaction injection molding (RIM) process are explained by the phenomenon of flow transformation in the mixing chamber.

Original languageEnglish
Pages (from-to)151-184
Number of pages34
JournalPolymer-Plastics Technology and Materials
Volume28
Issue number2
DOIs
StatePublished - Mar 1989

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