Development of an unsteady-state model for control of polymer grade transitions in Ziegler-Natta catalyzed reactor systems

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dc.contributor.authorRawatlal R.
dc.contributor.authorTincul I.
dc.date.accessioned2011-05-15T15:57:11Z
dc.date.available2011-05-15T15:57:11Z
dc.date.issued2007
dc.description.abstractThe dynamics of the activity and polymer growth in Ziegler-Natta catalysts has been well established in the literature.[1,2] The corresponding dynamic behaviour of the reactor system is predicted using a segregation model approach and the unsteady state model of residence time distribution previously developed.[3] The model is therefore able to predict reactor performance for a time-varying catalyst flow rate through the reactor, as well as time-varying concentrations of monomer, co-catalyst and chain termination agent. A method of determining grade transition policies by the use of the developed reactor models is then presented. It is demonstrated that the reactor productivity, catalyst efficiency, average chain length and polydispersity can be controlled by the catalyst flow rate and reactor monomer and hydrogen concentrations. The relationship between the required polymer product properties and the system flow rates is determined. Case studies are presented that evaluate various transition strategies for a specific polymer grades. Copyright © 2007 WILEY-VCH Verlag GmbH & Co. KGaA.
dc.description.versionArticle
dc.identifier.citationMacromolecular Symposia
dc.identifier.citation260
dc.identifier.issn10221360
dc.identifier.other10.1002/masy.200751412
dc.identifier.urihttp://hdl.handle.net/10019.1/10257
dc.subjectCatalysts
dc.subjectChain length
dc.subjectEfficiency
dc.subjectMonomers
dc.subjectPolymer grade transitions
dc.subjectResidence time distribution
dc.subjectUnsteady state modelling
dc.subjectZiegler-Natta polymerization
dc.subjectPolymers
dc.titleDevelopment of an unsteady-state model for control of polymer grade transitions in Ziegler-Natta catalyzed reactor systems
dc.typeArticle
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