Macromolecular Reaction Engineering

Cover image for Vol. 6 Issue 1

January 2012

Volume 6, Issue 1

Pages 3–64

  1. Cover Picture

    1. Top of page
    2. Cover Picture
    3. Masthead
    4. Contents
    5. Editorial
    6. Full Papers
    1. Macromol. React. Eng. 1/2012

      Dae Hwan Kim and You-Yeon Won

      Article first published online: 5 JAN 2012 | DOI: 10.1002/mren.201290001

      Thumbnail image of graphical abstract

      Cover: This work demonstrates that the glass transition temperature of an in situ polymerized carbon nanotube/polyimide (CNT/PI) nanocomposite can vary non-monotonically with the concentration of the reactive CNT added. This is due to its influence on the polycondensation reaction stoichiometry and thus on the molecular weight of the matrix PI polymer. Further details can be found in the article by D. H. Kim, and Y.-Y. Won* on page 45.

  2. Masthead

    1. Top of page
    2. Cover Picture
    3. Masthead
    4. Contents
    5. Editorial
    6. Full Papers
    1. Macromol. React. Eng. 1/2012

      Article first published online: 5 JAN 2012 | DOI: 10.1002/mren.201290002

  3. Contents

    1. Top of page
    2. Cover Picture
    3. Masthead
    4. Contents
    5. Editorial
    6. Full Papers
    1. Macromol. React. Eng. 1/2012 (pages 3–4)

      Article first published online: 5 JAN 2012 | DOI: 10.1002/mren.201290000

  4. Editorial

    1. Top of page
    2. Cover Picture
    3. Masthead
    4. Contents
    5. Editorial
    6. Full Papers
    1. You have free access to this content
      A Fast-Growing Child … (pages 6–7)

      Stefan Spiegel

      Article first published online: 21 DEC 2011 | DOI: 10.1002/mren.201100077

  5. Full Papers

    1. Top of page
    2. Cover Picture
    3. Masthead
    4. Contents
    5. Editorial
    6. Full Papers
    1. Block Copolymers From Living Emulsion Polymerization: Reactor Operating Strategies and Blocking Efficiency (pages 8–16)

      Ibrahem S. Altarawneh, Vincent G. Gomes and Mourtada H. Srour

      Article first published online: 25 NOV 2011 | DOI: 10.1002/mren.201100052

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      Block copolymers are synthesized using a RAFT agent in conjunction with emulsion polymerization via stage-wise operations. Living macromonomers from the first stage are chain-extended to produce styrene-, butyl-acrylate-, and methyl-acrylate-based copolymers. The semi-batch mode produces polymers of improved purity and polydispersity as shown by NMR and SEC data.

    2. Experimental Validation of Intermediate Termination in RAFT Polymerization with Dithiobenzoate via Comparison of Miniemulsion and Bulk Polymerization Rates (pages 17–23)

      Kiyoshi Suzuki, Yuko Nishimura, Yuta Kanematsu, Yoshie Masuda, Shuzaemon Satoh and Hidetaka Tobita

      Article first published online: 25 OCT 2011 | DOI: 10.1002/mren.201100054

      Thumbnail image of graphical abstract

      Not the slow fragmentation model (SFM) but the intermediate termination model (ITM) is shown to be applicable for styrene RAFT polymerization with dithiobenzoate via comparison of miniemulsion polymerization rate with bulk polymerization rate. The ITM gives a significantly higher measured rate of miniemulsion polymerization (average diameter = 107 nm) than bulk polymerization, while SFM does not.

    3. You have free access to this content
      Copolymerization of VDF and HFP in Supercritical Carbon Dioxide: A Robust Approach for Modeling Precipitation and Dispersion Kinetics (pages 24–44)

      Liborio I. Costa, Giuseppe Storti, Massimo Morbidelli, Loredana Ferro, Alessandro Galia, Onofrio Scialdone and Giuseppe Filardo

      Article first published online: 17 NOV 2011 | DOI: 10.1002/mren.201100048

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      A detailed kinetic model is developed and applied to the heterogeneous free-radical copolymerization of vinylidene fluoride and hexafluoropropylene in supercritical carbon dioxide. The model, accounting for polymerization occurring in both the dispersed polymer-rich and in the continuous supercritical phase, compares favorably with experimental results of conversion and molecular weight distribution.

    4. In Situ Polymerized Carbon Nanotube/Polyimide Nanocomposites: Effect of Reaction Stoichiometry on the Glass Transition Properties of the Nanocomposites (pages 45–56)

      Dae Hwan Kim and You- Yeon Won

      Article first published online: 6 DEC 2011 | DOI: 10.1002/mren.201100027

      Thumbnail image of graphical abstract

      It is demonstrated that the glass transition temperature of an in situ polymerized carbon nanotube/polyimide nanocomposite can vary non-monotonically with the concentration of the reactive CNT added. This fact is attributed to the influence of the CNT concentration on the polycondensation reaction stoichiometry and thus on the molecular weight of the matrix PI polymer.

    5. Synthesis of a TiCl4 Ziegler-Natta Catalyst Supported on Spherical MgCl2 · nEtOH for the Polymerization of Ethylene and Propylene (pages 57–64)

      Lidiane A. Almeida and Maria de Fátima V. Marques

      Article first published online: 11 NOV 2011 | DOI: 10.1002/mren.201100049

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      Methods for the preparation of Ziegler-Natta catalysts with controlled particle morphology are evaluated. They differ in the dealcoholation agents and processes. The catalyst with the highest Ti content, whose support has the largest pores, shows the best performance in both ethylene and propylene polymerization. The polymers particles have a spherical morphology.

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