Macromolecular Reaction Engineering

Cover image for Vol. 6 Issue 6‐7

July 2012

Volume 6, Issue 6-7

Pages 243–292

  1. Cover Picture

    1. Top of page
    2. Cover Picture
    3. Masthead
    4. Contents
    5. Communication
    6. Full Papers
    1. Macromol. React. Eng. 6–7/2012

      Christian H. Hornung, Almar Postma, Simon Saubern and John Chiefari

      Article first published online: 3 JUL 2012 | DOI: 10.1002/mren.201290015

      Thumbnail image of graphical abstract

      Cover: The Reversible Addition-Fragmentation chain Transfer (RAFT) method is a convenient and versatile process to control free radical polymerization. A key feature of this process is that the so-called RAFT end groups are retained in the polymer product, which may be unfavorable in certain applications. One of the methods for removing the RAFT end group is based on the radical-induced reduction of the end group in the presence of an H-atom source. Herein we describe a novel continuous flow process for this radical-induced reduction. Further details can be found in the article by C. H. Hornung,* A. Postma, S. Saubern, J. Chiefari* on page 246.

  2. Masthead

    1. Top of page
    2. Cover Picture
    3. Masthead
    4. Contents
    5. Communication
    6. Full Papers
    1. Macromol. React. Eng. 6–7/2012

      Article first published online: 3 JUL 2012 | DOI: 10.1002/mren.201290016

  3. Contents

    1. Top of page
    2. Cover Picture
    3. Masthead
    4. Contents
    5. Communication
    6. Full Papers
    1. Macromol. React. Eng. 6–7/2012 (pages 243–245)

      Article first published online: 3 JUL 2012 | DOI: 10.1002/mren.201290014

  4. Communication

    1. Top of page
    2. Cover Picture
    3. Masthead
    4. Contents
    5. Communication
    6. Full Papers
    1. A Continuous Flow Process for the Radical Induced End Group Removal of RAFT Polymers (pages 246–251)

      Christian H. Hornung, Almar Postma, Simon Saubern and John Chiefari

      Article first published online: 20 JUN 2012 | DOI: 10.1002/mren.201200007

      Thumbnail image of graphical abstract

      A continuous flow process for the radical-induced end-group removal of polymers prepared by RAFT polymerization is described. Acrylamide, methacrylate, and styrene polymers are reacted with initiator and an H-source in a steel tube flow reactor system at 100 °C in organic solvents or water. After reaction, the polymers show low dispersities between 1.03 and 1.19.

  5. Full Papers

    1. Top of page
    2. Cover Picture
    3. Masthead
    4. Contents
    5. Communication
    6. Full Papers
    1. Muti-Objective Nonlinear Model Predictive Control of Semibatch Polymerization Reactors (pages 252–264)

      Pilar Morales and Antonio Flores-Tlacuahuac

      Article first published online: 18 MAY 2012 | DOI: 10.1002/mren.201100074

      Thumbnail image of graphical abstract

      The design of polymerization reactors faces control problems that are contradictory. To meet all the objectives in the best possible way a trade-off among all of them must be pursued. A multi-objective control approach to deal with the dynamic optimization of polymerization is proposed and applied to two industrially relevant polymerization reactors.

    2. Effect of Hydrogen and External Donor on Propylene Polymerization Kinetics with a 4th-Generation Ziegler-Natta Catalyst (pages 265–274)

      Ahmad Alshaiban and João B. P. Soares

      Article first published online: 17 APR 2012 | DOI: 10.1002/mren.201200002

      Thumbnail image of graphical abstract

      The effect of hydrogen and external donor on the apparent kinetic rate constants for propylene polymerization with a Ziegler-Natta catalyst is quantified. Donor and hydrogen do not affect activation energies significantly, but change the balance between site types, which is quantified as a change in the pre-exponential terms of the apparent kinetic constants.

    3. Development of a Large-Scale Stopped-Flow System for Heterogeneous Olefin Polymerization Kinetics (pages 275–279)

      Toshiaki Taniike, Shinya Sano, Mitsuhiro Ikeya, Vu Quoc Thang and Minoru Terano

      Article first published online: 19 APR 2012 | DOI: 10.1002/mren.201200003

      Thumbnail image of graphical abstract

      A new large-scale stopped-flow system is established for the scalability and stability of Ziegler-Natta olefin polymerization in an early stage. The new system offers highly accurate polymerization over a wide range of polymerization time from 0.03 s to a few seconds.

    4. Suspension Copolymerization of Vinyl Acetate and Methyl Methacrylate in the Presence of Amoxicillin (pages 280–292)

      Marco Antonio M. Oliveira, Príamo A. Melo Jr., Márcio Nele and José Carlos Pinto

      Article first published online: 18 JUN 2012 | DOI: 10.1002/mren.201100083

      Thumbnail image of graphical abstract

      The effects of amoxicillin on the course of VAc/MMA suspension copolymerizations and on the properties of the final polymer particles are investigated. It is shown that the presence of the drug causes broadening of particle size distributions, inhibition of reaction rates, and modification of molecular weight distributions.

SEARCH

SEARCH BY CITATION