Effect of the addition of inert or TEMPO-capped prepolymer on polymerization rate and molecular weight development in the nitroxide-mediated radical polymerization of styrene

dc.creatorRoa-Luna, M
dc.creatorNabifar, A
dc.creatorMcManus, NT
dc.creatorVivaldo-Lima, E
dc.creatorLona, LMF
dc.creatorPenlidis, A
dc.date2008
dc.dateSEP 15
dc.date2014-11-17T16:23:47Z
dc.date2015-11-26T16:44:44Z
dc.date2014-11-17T16:23:47Z
dc.date2015-11-26T16:44:44Z
dc.date.accessioned2018-03-28T23:30:11Z
dc.date.available2018-03-28T23:30:11Z
dc.identifierJournal Of Applied Polymer Science. John Wiley & Sons Inc, v. 109, n. 6, n. 3665, n. 3678, 2008.
dc.identifier0021-8995
dc.identifierWOS:000257724900031
dc.identifier10.1002/app.28507
dc.identifierhttp://www.repositorio.unicamp.br/jspui/handle/REPOSIP/64335
dc.identifierhttp://www.repositorio.unicamp.br/handle/REPOSIP/64335
dc.identifierhttp://repositorio.unicamp.br/jspui/handle/REPOSIP/64335
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1274023
dc.descriptionThe importance of diffusion-controlled (DC) effects on controlled radical polymerization (CRP) processes has been rather controversial and usually considered only if there is some mismatch between experimental data and model predictions of polymerization rate and molecular weight averages. Results from an experimental study designed to create conditions in which DC effects may be present from the outset for the bimolecular nitroxide-mediated radical polymerization (NMRP) of styrene in the presence of 2,2,6,6-tetramethyl-1-piperidinyloxy (TEMPO) and dibenzoyl peroxide (BPO), are presented herein. The experiments consisted of adding size exclusion chromatography (SEC) polystyrene (PS) standards or nitroxyl-capped PS (of different molecular weights, in several proportions), to a conventional recipe of bimolecular NMRP of styrene, and studying the effect of their presence on polymerization rate and molecular weight development. A previously developed kinetic model for NMRP of styrene was modified to take into account the presence of prepolymer as an inert "solvent," or as a monomolecular "controller" of high molecular weight. The effects of DC reactions (propagation, termination, activation, and deactivation of polymer radicals) were modeled using conventional free-volume theory. Reasonably, good agreement between experimental data and model predictions with either modeling approach was obtained. It was concluded that DC effects are weak in the NMRP of styrene, even in the presence of prepolymer. (c) 2008 Wiley Periodicals, Inc. J Appl Polym Sci 109: 3665-3678, 2008.
dc.description109
dc.description6
dc.description3665
dc.description3678
dc.languageen
dc.publisherJohn Wiley & Sons Inc
dc.publisherHoboken
dc.publisherEUA
dc.relationJournal Of Applied Polymer Science
dc.relationJ. Appl. Polym. Sci.
dc.rightsfechado
dc.rightshttp://olabout.wiley.com/WileyCDA/Section/id-406071.html
dc.sourceWeb of Science
dc.subjectliving polymerization
dc.subjectradical polymerization
dc.subjectkinetics of polymerization
dc.subjectmodeling
dc.subjectpolystyrene
dc.subjectDibenzoyl Peroxide
dc.subjectKinetics
dc.subjectCopolymerization
dc.subjectSimulation
dc.subjectDesign
dc.subjectNmrp
dc.titleEffect of the addition of inert or TEMPO-capped prepolymer on polymerization rate and molecular weight development in the nitroxide-mediated radical polymerization of styrene
dc.typeArtículos de revistas


Este ítem pertenece a la siguiente institución