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375 Newest Publications in macromolecular reaction engineering

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A Closed‐Loop Control Strategy for Producing Nitrile Rubber of Uniform Chemical Composition in a Semibatch Reactor: A Simulation Study

18-Jan-2018 | Luis A. Clementi, Romina B. Suvire, Francisco G. Rossomando, Jorge R. Vega, Macromolecular Reaction Engineering, 2018

Abstract To improve the quality of industrial nitrile rubbers, the copolymer chemical composition, pA(t), should ideally be kept constant along the reaction. This work proposes a closed‐loop control strategy for the semibatch operation of the reactor with the aim of regulating pA(t) within a ...

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Tuning Bis(imino)pyridyl Iron‐Catalyzed Ethylene Oligomerization by Modification of MAO with p‐BrPhOH

15-Jan-2018 | Wei Zhang, Jian Ye, Binbo Jiang, Jingdai Wang, Zuwei Liao, Zhengliang Huang, Yongrong Yang, Zhibin Ye, Macromolecular Reaction Engineering, 2018

Abstract To reduce the simultaneous production of insoluble polymers during the bis(imino)pyridyl iron‐catalyzed ethylene oligomerization, in this study, p‐BrPhOH (4‐bromophenol) has been chosen as the most optimal modifier for the production of linear α‐olefins. It is found that the polymer ...

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Kinetics of Bulk Free‐Radical Polymerization of Butyl Methacrylate Isomers Studied by Reaction Calorimetry

19-Dec-2017 | David Victoria‐Valenzuela, Jorge Herrera‐Ordonez, Antonio Arcos‐Casarrubias, Humberto Vazquez‐Torres, Macromolecular Reaction Engineering, 2017

Abstract The kinetics of bulk free‐radical polymerizations of n‐butyl methacrylate (n‐BMA), iso‐butyl methacrylate (i‐BMA), and tert‐butyl methacrylate (t‐BMA) are studied by differential scanning calorimetry and with the aid of a mathematical model previously reported by the authors. In all ...

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Macromol. React. Eng. 4/2017

16-Aug-2017 | Joris J. Haven, Neomy Zaquen, Maarten Rubens, Tanja Junkers, Macromolecular Reaction Engineering, 2017

Front Cover: Microreactor technology in combination with a high‐resolution mass spectrometer allows for on‐line “nonstop” analysis. The kinetics of n‐butyl acrylate polymerizations are studied for a wide range of temperatures and residence times. Via adjustment of flow rates in the reactor, ...

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Macromol. React. Eng. 4/2017

16-Aug-2017 | Joris J. Haven, Neomy Zaquen, Maarten Rubens, Tanja Junkers, Macromolecular Reaction Engineering, 2017

Front Cover: Microreactor technology in combination with a high‐resolution mass spectrometer allows for on‐line “nonstop” analysis. The kinetics of n‐butyl acrylate polymerizations are studied for a wide range of temperatures and residence times. Via adjustment of flow rates in the reactor, ...

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Modeling and Experimentation of RAFT Solution Copolymerization of Styrene and Butyl Acrylate, Effect of Chain Transfer Reactions on Polymer Molecular Weight Distribution

28-Jul-2017 | Jie Jiang, Wen‐Jun Wang, Bo‐Geng Li, Shiping Zhu, Macromolecular Reaction Engineering, 2017

Chain transfer reactions widely exist in the free radical polymerization and controlled radical polymerization, which can significantly influence polymer molecular weight and molecular weight distribution. In this work, the chain transfer reactions in modeling the reversible ...

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Macromol. React. Eng. 3/2017

19-Jun-2017 | Wenwen Mei, Milan Maric, Macromolecular Reaction Engineering, 2017

Front Cover: Nitroxide mediated polymerization (NMP) with SG1/based initiators is used to prepare hydroxyethyl methacrylate (HEMA)‐rich copolymers using a small fraction ≈ 10 mol% of co‐monomer, acrylonitrile (AN). HEMA/AN copolymerizations exhibit linear degree of polymerization versus ...

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Tailoring Polymer Molecular Weight Distribution and Multimodality in RAFT Polymerization Using Tube Reactor with Recycle

08-Jun-2017 | Liang Xiang, Wen‐Jun Wang, Bo‐Geng Li, Shiping Zhu, Macromolecular Reaction Engineering, 2017

Solution reversible addition fragmentation chain transfer (RAFT) polymerization of butyl acrylate in 50 wt% toluene, initiated with 2,2′‐azobisisobutyronitrile and mediated with 3‐benzyltrithiocarbonyl propionic acid, is carried out in a tube reactor of 1.65 mm inner diameter. The tube reactor ...

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Bringing the On‐Line Control and Optimization of Semibatch Emulsion Copolymerization to the Pilot Plant

06-Jun-2017 | Alexandr Zubov, Omar Naeem, Svein Olav Hauger, Ala Bouaswaig, Fredrik Gjertsen, Peter Singstad, Klaus‐Dieter Hungenb ..., Macromolecular Reaction Engineering, 2017

Due to hardening competition and increased focus on resource efficiency, efforts are made to develop advanced industrial optimization and control systems with the goal to shift the (semi‐)batch production from recipe‐based to a state‐based approach. This study illustrates the steps needed for ...

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Cross Linking Between the Baffling Effect and Phase Inversion During Liquid–Liquid Monomer Mixing

31-May-2017 | Jared Cocke, Sebastian Maaß, Macromolecular Reaction Engineering, 2017

Recent studies have revealed unexpected developments in drop size by only small changes in the geometrical constraints of batch vessels used for suspension polymerization. The effect of the dispersed phase fraction, surfactant concentration, as well as baffle length on the evolving drop size ...

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