Macromolecular Reaction Engineering

Cover image for Vol. 9 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. Effect of Prepolymerization on the Kinetics of Ethylene Polymerization and Ethylene/1-Hexene Copolymerization with a Ziegler–Natta Catalyst in Slurry Reactors

    Keran Chen, Boping Liu and João B. P. Soares

    Article first published online: 29 JAN 2016 | DOI: 10.1002/mren.201500066

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    The effect of prepolymerization conditions is quantified on ethylene homopolymerization and ethylene/1-hexene copolymerization using a lumped-parameter polymerization kinetics model. The apparent kinetic constants correlates not only to the prepolymerization conditions, but also to the morphology of the prepolymer particles: prepolymer particles with better fragmentation and less polymer fibrils activate faster and polymerize at higher rates in the main polymerization reactor.

  2. Optimizing Control and State Estimation of a Continuous Polymerization Process in a Tubular Reactor with Multiple Side-Streams

    Reza Hashemi, Daniel Kohlmann and Sebastian Engell

    Article first published online: 29 JAN 2016 | DOI: 10.1002/mren.201500034

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    Production of polymers in modular continuous reactors was one of the goals of the European F3-factory project. The control of such plants is not an easy task as the process is described by nonlinear complex partial differential equations and the available measurements are few. In this work, we propose an optimizing control scheme to control such plants and maximize the plant throughput, while the product quality constraints are met.

  3. Vanadium Modification Effects on the (SiO2/MgO/MgCl2)•TiClx Ziegler–Natta Polyethylene Catalyst

    Jingwen Wang, Ruihua Cheng, Xuelian He, Zhen Liu, Ning Zhao and Boping Liu

    Article first published online: 22 JAN 2016 | DOI: 10.1002/mren.201500056

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    Novel vanadium-modified (SiO2/MgO/MgCl2)·TiClx Ziegler–Natta ethylene polymerization catalysts with improved catalytic performance are successfully developed and systematically investigated. Proper addition amount of vanadium modification induce better catalytic performance with 27% higher activity, 48% higher hydrogen response, and 60% higher 1-hexene incorporation ability with better short chain branch distribution.

  4. Flash Latex Production in a Continuous Helical Photoreactor: Releasing the Brake Pedal on Acrylate Chain Radical Polymerization

    Abraham Chemtob, Emeline Lobry, Agnès Rannée, Florent Jasinski, Marta Penconi, Esther Oliveros, André M. Braun and Adrien Criqui

    Article first published online: 21 JAN 2016 | DOI: 10.1002/mren.201500060

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    A novel continuous radical photopolymerization process enables to convert acrylate monomer emulsion with surprisingly high efficiency. The combination of a photochemical minireactor, the resulting very short polymerization times, low costs of production, and the simplicity of the equipment may be of interest to change the way emulsion polymerization is performed both at research and industrial levels.

  5. Effect of Droplet Size in Acrylamide-Based Microgel Formation by Microfluidics

    Fany Di Lorenzo and Sebastian Seiffert

    Article first published online: 21 JAN 2016 | DOI: 10.1002/mren.201500061

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    Above-colloidal-scale microgel particles can be prepared with exquisite control by droplet-based microfluidic particle templating followed by droplet gelation. In this process, the success of droplet gelation depends on the concentration of reagents within the droplets, on temperature, and on droplet size, which this work assesses in a systematic fashion for two popular acrylamide-type monomers.