Modeling of free radical polymerization up to high conversion. II. Development of a mathematical model

Share/Save/Bookmark

Tefera, N. and Weickert, G. and Westerterp, K.R. (1997) Modeling of free radical polymerization up to high conversion. II. Development of a mathematical model. Journal of Applied Polymer Science, 63 (12). pp. 1663-1680. ISSN 0021-8995

[img]
Preview
PDF
415Kb
Abstract:In free radical polymerization diffusion-controlled processes take place simultaneously to the normal chemical reactions. Despite extensive efforts to model such processes a consistent model for the design of a polymerization reactor has not yet been established. In this article a semiempirical model describing the conversion, polymerization degree, and molecular weight distribution (MWD) for the free radical polymerization is developed for the entire course of the reaction. The model includes the change of termination, propagation, transfer, and initiation rate. By simultaneous parameter estimation from the conversion and degrees of polymerization data the model parameters have been determined for isothermal polymerizations of methyl methacrylate (MMA) and styrene (ST). The simulation results for the conversion, degrees of polymerization, and MWD are in good accordance with experimental data for suspension and bulk polymerization of MMA and ST up to very high conversions. The influence of diffusion on the propagation rate in case of polymerization of MMA is negligible compared to the influence of the cage effect on the radical efficiency; in case of ST polymerization both effects must be included in the kinetic model. The model presented is also tested for polymerizations conducted in the presence of solvent and/or chain transfer agents.
Item Type:Article
Copyright:© 1997 Wiley InterScience
Research Group:
Link to this item:http://purl.utwente.nl/publications/71432
Official URL:http://www3.interscience.wiley.com/journal/42906/abstract
Export this item as:BibTeX
EndNote
HTML Citation
Reference Manager

 

Repository Staff Only: item control page

Metis ID: 106233