Macromolecular Reaction Engineering

Cover image for Vol. 11 Issue 2

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. Effects of Alkyl Aluminum on SiO2-Supported Silyl-Chromate(Cr)/Imido-Vanadium(V) Bimetallic Catalysts for Producing Bimodal Polyethylene

    Bangming Liu, Ning Zhao, Yulong Jin, Ruihua Cheng, Xuelian He, Zhen Liu and Boping Liu

    Version of Record online: 18 MAY 2017 | DOI: 10.1002/mren.201700006

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    Effects of alkyl aluminum on SiO2-Supported Cr–V bimetallic catalyst are systematically investigated by ethylene polymerization and characterization of these polymer products. The results show that the optimum polymerization activity significantly increases after the catalyst is prereduced by triisobutylaluminum or triethylaluminum. The diethylaluminum chloride is mostly deactivating the Cr species during the ethylene polymerization.

  2. Propylene Polymerization Reactor Control and Estimation Using a Particle Filter and Neural Network

    Ana Carolina Spindola Rangel Dias, Wellington Betencurte da Silva and Julio Cesar Sampaio Dutra

    Version of Record online: 16 MAY 2017 | DOI: 10.1002/mren.201700010

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    A virtual sensor scheme based on a particle filter and an artificial neural network (ANN), which is applied to a simulated polymerization reactor is proposed in this paper. This scheme enables uncertainty reduction and observation of the latent variables. The ANN is also used for sensing the final properties of the polymer. The goal is to provide controllers more complete and improved information.

  3. Effects of Alterations to Ziegler–Natta Catalysts on Kinetics and Comonomer (1-Butene) Incorporation

    Paul Aigner, Elena Averina, Thomas Garoff and Christian Paulik

    Version of Record online: 15 MAY 2017 | DOI: 10.1002/mren.201700009

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    Various MgCl2-supported Ziegler–Natta catalysts with modifications during different synthesis steps are prepared. Among the different modifications, heat treatment during titanation shows the greatest impact. Increasing the heat-treatment temperature increases polymerization activity and more importantly affects the 1-butene incorporation. The 1-butene distribution can be shifted toward a more homogeneous profile. This suggests that the active sites are distributed more homogeneously.

  4. Soft Sensor Applications in Industrial Vinylacetate-ethylene (VAE) Polymerization Processes

    Eric Frauendorfer and Wolf-Dieter Hergeth

    Version of Record online: 9 MAY 2017 | DOI: 10.1002/mren.201700008

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    The use of soft sensors in vinylacetate-ethylene polymerizations can be used to infer properties not directly measurable. The setup of a soft sensor in an industrial environment for a long term, successful application needs to take into account several additional hurdles that are illuminated using the development of a VAE dispersion tile adhesive tensile strength soft sensor.

  5. Mathematical Modeling of Nylon 6/6,6 Copolymerization: Beneficial Influence of Comonomers on Degree of Polymerization in Batch Reactor

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

    Version of Record online: 8 MAY 2017 | DOI: 10.1002/mren.201700002

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    A batch reactor model is developed to describe copolymerization of caprolactam with hexamethylene diamine and adipic acid. Probability factors are introduced to make the model equations relatively simple. Comparisons between simulations of nylon 6/6,6 copolymerization and nylon 6 and 6,6 homopolymerizations show beneficial influences of comonomers on degree of polymerization.