Macromolecular Reaction Engineering

Cover image for Vol. 11 Issue 6

Editor-in-Chief: Kirsten Severing, Editor: Stefan Spiegel

Online ISSN: 1862-8338

Associated Title(s): Macromolecular Chemistry and Physics, Macromolecular Materials and Engineering, Macromolecular Rapid Communications, Macromolecular Theory and Simulations

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Recently Published Articles

  1. Design and Preparation of Highly Filled Water-Borne Polymer–Gibbsite Nanocomposites

    Olessya P. Loiko, Anne B. Spoelstra, Alexander M. van Herk, Jan Meuldijk and Johan P. A. Heuts

    Version of Record online: 12 DEC 2017 | DOI: 10.1002/mren.201700051

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    Highly filled water-borne anisotropic polymer–Gibbsite nanocomposites are successfully synthesized using a simple mathematical model. Experimental design using this approach results in the desired products with solids contents of 40 wt% and filler contents up to 35 wt%.

  2. Mathematical Modeling of Nylon 6/6,6 Copolymerization in Batch Reactor: Investigating Recipes without Water and with Cyclic Dimer

    Fei F. Liu, James M. Hurley, Neeraj P. Khare and Kim B. McAuley

    Version of Record online: 12 DEC 2017 | DOI: 10.1002/mren.201700040

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    Copolymerization recipes are investigated using a batch reactor model for copolymerization of caprolactam, hexamethylene diamine, and adipic acid. When dry nylon 6,6 salt is used rather than aqueous salt solution, a higher degree of polymerization is obtained. Waste cyclic dimer can be used effectively in the recipe, especially if water from nylon 6,6 salt solution is present in the recipe.

  3. 1-Hexene Polymerization over Supported Titanium–Magnesium Catalyst: The Effect of Composition of the Catalytic System and Polymerization Conditions on Temperature Dependence of the Polymerization Rate

    Ludmila Echevskaya, Vladimir Zakharov, Mikhail Matsko and Marina Nikolaeva

    Version of Record online: 28 NOV 2017 | DOI: 10.1002/mren.201700045

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    The unusual data that the polymer rate decreases when temperature is increased are obtained for 1-hexene polymerization over supported titanium–magnesium catalyst. The calculated effective activation energy values vary within a broad range from –5.5 to 4.8 kcal mol−1 and depend on cocatalyst composition, presence or absence of hydrogen, and external donor. The possible reasons of such phenomenon are discussed.

  4. Particle Growth during the Polymerization of Olefins on Supported Catalysts. Part 2: Current Experimental Understanding and Modeling Progresses on Particle Fragmentation, Growth, and Morphology Development

    Arash Alizadeh and Timothy F. L. McKenna

    Version of Record online: 23 OCT 2017 | DOI: 10.1002/mren.201700027

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    The single particle models developed to describe the morphology evolution in a growing particle during the course of olefin polymerization on supported catalysts are reviewed here. The main assumptions, abilities, and limitations of the models are evaluated and the issues which face developing a completely predictive model are finally discussed.

  5. Design of Nonlinear Model-Based Control Using Bifurcation Analysis for Solution Polymerizations Carried Out in Lumped-Distributed Reactors

    Márcia P. Vega, Gabrielle F. M. Oliveira, Enrique L. Lima and José Carlos Pinto

    Version of Record online: 17 OCT 2017 | DOI: 10.1002/mren.201700028

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    Bifurcation theory is employed for nonlinear control design. The figure presents the closed loop bifurcation diagram, using the weight average molecular weight setpoint as the continuation parameter.