Macromolecular Reaction Engineering
© WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
Materials Science Weekly Newsletter
Recently Published Articles
- Growth of Polyethylene Nanofibrils Over rac-Et(Indenyl)2ZrCl2/MAO Catalyst Supported on Silica Nanotubes
Sang Yool Lee, Joong Jin Han, Sang Bok Lee and Kyu Yong Choi
Article first published online: 6 JUL 2015 | DOI: 10.1002/mren.201500022
Silica nanotubes deposited with a metallocene catalyst polymerize ethylene to nanofibrils that extrude out from the nanoscale channels as intertwined bundles. This work shows that the basic dimension of polyethylene nanofibrils at the catalyst surface is 30–35 nm diameter fibrils of high crystallinity. The catalytic silica nanotubes also offer good accessibility for monomer and hence high initial polymerization rate.
- Poly(3-hydroxybutirate-co-3-hydroxyvalerate)–Polystyrene Hybrid Nanoparticles via Miniemulsion Polymerization
Fernanda Vitória Leimann, Cristiane Costa, Odinei Hess Gonçalves, Anna Musyanovych, Katharina Landfester, Claudia Sayer and Pedro Henrique Hermes de Araújo
Article first published online: 6 JUL 2015 | DOI: 10.1002/mren.201500023
In the present work, a novel hybrid polymer is synthesized with PHBV and PS by miniemulsion polymerization. Nanoparticles presenting narrow size distribution, a high grafting yield, and the hybrid formation is confirmed by FTIR and DSC. The new material presents different thermal characteristics enabling its use for new applications.
- Modeling Acrylic Acid Radical Polymerization in Aqueous Solution
Nils F. G. Wittenberg, Calista Preusser, Hendrik Kattner, Marek Stach, Igor Lacík, Robin A. Hutchinson and Michael Buback
Article first published online: 11 JUN 2015 | DOI: 10.1002/mren.201500017
The complexities of aqueous-phase polymerization of non-ionized acrylic acid are captured in a model that considers the formation of midchain radicals, the influence of radical chain length on termination kinetics, and the influence of monomer concentration on propagation kinetics. The model is verified against monomer conversion profiles, polymer branching levels, and molar mass distributions collected over a range of experimental conditions.
- When Polymer Reaction Engineers Play Dice: Applications of Monte Carlo Models in PRE (pages 141–185)
Amanda L. T. Brandão, João B. P. Soares, José Carlos Pinto and André L. Alberton
Article first published online: 3 JUN 2015 | DOI: 10.1002/mren.201500020
Monte Carlo (MC) methods are the most powerful of all mathematical methods used in polymer reaction engineering because they can predict the molecular architecture of polymers with details that cannot be easily captured by any other modeling technique. This article reviews the literature on steady-state and dynamic MC methods in polymer reaction engineering. We hope to convince the readers that playing dice regularly can be a great asset to polymer reactors engineers.
- You have free access to this contentMathematical Tools and Approaches for Polymerization Reaction Engineering II— Statistical Modeling Tools and Approaches (pages 138–140)
José Carlos Pinto
Article first published online: 26 MAY 2015 | DOI: 10.1002/mren.201500027