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- Title
Modelling and Optimization of Nonlinear Polymerization Processes.
- Authors
Bachmann, Rolf; Melchiors, Martin; Avtomonov, Evgeny
- Abstract
Reactions such as branching and crosslinking leading to nonlinear polymers play an important role in many polymerization productions, but they increase the sensitivity of the processes and increase the requirements for their design and control. It is therefore desirable to have an accurate and simple means to model these processes. However, the simplest method for the description of the polymers: the method of moments was said to fail in the nonlinear case because of the so called closure problem. It will be shown here how to extend the method of moments to nonlinear processes in the pregel region − except scission − and thus provide a simple means for the simulation and optimization of the main parameters of a polymer distribution. Furthermore, the assumption of one radical per polymer molecule is no longer needed. The formulas allow average polymer properties to be easily included in flow sheet simulations or computational fluid dynamics codes and allow checking other more elaborate codes for the description of polymer distributions. Examples will be given for free radical polymerizations. An approximation in case of scission will be discussed together with an application to reversible polycondensation.
- Subjects
CROSSLINKING (Polymerization); POLYCONDENSATION kinetics; FREE radicals; SCISSION (Chemistry); NONLINEAR chemical kinetics
- Publication
Macromolecular Symposia, 2016, Vol 370, Issue 1, p135
- ISSN
1022-1360
- Publication type
Article
- DOI
10.1002/masy.201600087