Macromolecular Reaction Engineering
Copyright © 2013 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
Recently Published Articles
- Mathematical Modeling of NMRP of Styrene–Divinylbenzene over the Pre- and Post-Gelation Periods Including Cyclization
Leandro G. Aguiar, Miguel A. D. Gonçalves, Virgínia D. Pinto, Rolando C. S. Dias, Mário Rui P. F. N. Costa and Reinaldo Giudici
Article first published online: 29 NOV 2013 | DOI: 10.1002/mren.201300171
Three modeling approaches for the NMRP of styrene–divinylbenzene are studied and compared with experiments. A hypothetical reduction of reactivity is tested for the crosslinking reactions involving polymer molecules belonging to different generations, yielding simultaneous agreement of predicted and measured weight-average molecular weight and weight fraction of gel.
- Frontal Reaction of Epoxy Oligomers in Tubular Flux Reactors
Anahit O. Tonoyan, Sevan P. Davtyan and Stefan C. Müller
Article first published online: 27 NOV 2013 | DOI: 10.1002/mren.201300170
This work reports on the observation of reaction fronts of polymers in tubular reactors and its successful numerical description. It is shown that frontal reaction of epoxy oligomers occurs by aromatic amines and that simulations in one- and two-dimensional setups agree well with the experiments. Furthermore, nonlinear dynamical regimes such as oscillations of front velocity and geometric changes of the front shape are detected.
- The Use of Instantaneous Distributions in Polymerization Reaction Engineering
João B. P. Soares
Article first published online: 27 NOV 2013 | DOI: 10.1002/mren.201300173
Instantaneous distributions are analytical solutions that describe several aspects of polymer microstructures at a given instant of time. Cumulative distributions are obtained by integrating instantaneous solutions over time and reactor volume. The method of instantaneous distributions is a powerful technique that can be used to describe many aspects of the polymer molecular architecture at low computational cost.
- Progress in Understanding of the Interactions between Functionalized Polyolefins and Organo-Layered Double Hydroxides
Serena Coiai, Lucía Pérez Amaro, Francesca Cicogna, Nadka Tz. Dintcheva, Francesca Liguori, Pierluigi Barbaro and Elisa Passaglia
Article first published online: 27 NOV 2013 | DOI: 10.1002/mren.201300154
The interactions between two different functionalized PE samples (PEMAH and PEDEM) and an O-LDH are investigated. The formation of ionic domains between O-LDH and PEMAH is assumed due to the conversion of anhydride/acid moieties into carboxylate species partially displacing the surfactant, with a marked change in solubility and rheological properties of the final hybrid material. The PEDEM intercalation between the layers of O-LDH is promoted by favorable polymer/filler interactions, but the composite is completely soluble.
- Effect of the Polymerization Technique and Reactor Type on the Poly(n-butyl acrylate) Microstructure
Arvind Kumar Yadav, María Jesús Barandiaran and José Carlos de la Cal
Article first published online: 22 NOV 2013 | DOI: 10.1002/mren.201300159
Strategies to obtain poly(n-butyl acrylate) latexes with different microstructures are explored. By selecting the proper polymerization technique (emulsion vs. miniemulsion) as well as the reactor type (batch vs. continuous tubular reactor) at the right operation conditions, a broad range of poly(n-butyl acrylate) architectures can be achieved.