Macromolecular Reaction Engineering
Copyright © 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
Materials Science Weekly Newsletter
Recently Published Articles
- A Novel Approval for Degradation of Polybutadiene and Synthesis of Diene-Based Telechelic Oligomers via Olefin Cross Metathesis
Bin Jiang, Tian Wei, Ting-Ting Zou, Gary L. Rempel and Qin-Ming Pan
Article first published online: 1 APR 2015 | DOI: 10.1002/mren.201500004
Synthesis of well-defined functionalized telechelic oligomers containing only a few butadiene repeating units is accomplished via metathetic degradation of polybutadiene in the presence of Grubbs second generation catalyst with selected monomers as chain transfer agents. The structures and compositions of metathesis products are acquired using 1H-NMR and GC-MS analysis.
- Investigating Effects of Using Mixtures of Two External Electron Donors on Microstructure and Properties of Polypropylene/Poly(ethylene-co-propylene) in-Reactor Blends Based on Ziegler–Natta Catalyst
Leila Moballegh, Shokoufeh Hakim, Jalil Morshedian and Mehdi Nekoomanesh
Article first published online: 1 APR 2015 | DOI: 10.1002/mren.201500002
The effects of using mixtures of two electron donors; phenyltriethoxysilane (donor A) and cyclohxylmethyldimethoxy silane (donor C) on activity, microstructure and mechanical properties have been shown. Mixture of electron donors has a synergistic effect on the molecular weight of the blends. The amount of block PP-PE copolymer and impact strength are higher in the case of the blend based on A/C:75/25 than other blends based on pure and mixture of donors.
- Modeling of the Dehydration Process Coupled with Solid-State Polymerization in Nylon 6 Drying Column
Guojian Sun, Chunxi Qin, Zhenhao Xi, Zhimei Xu, Weizhen Sun and Ling Zhao
Article first published online: 1 APR 2015 | DOI: 10.1002/mren.201400062
Nylon 6 drying is a gas–solid countercurrent process, containing both mass/heat transfer and solid-state polymerization (SSP) at relative low temperatures. In this paper, an integrated model combining the mass/heat transfer and polymerization reaction has been presented for Nylon 6 drying process. The influences of operation conditions on the moisture content and the degree of polymerization distribution profiles in industrial drying column have been discussed.
- Alternation of Pore Architecture of Ziegler–Natta Catalysts through Modification of Magnesium Ethoxide
Toshiki Funako, Patchanee Chammingkwan, Toshiaki Taniike and Minoru Terano
Article first published online: 27 MAR 2015 | DOI: 10.1002/mren.201400074
The modification of magnesium ethoxide with a small amount of i-propoxide caused the transformation of the crystalline phase and the particle densification, leading to significant alternation of the pore architecture of Ziegler–Natta catalysts.
- Encapsulation of PV Modules Using Ethylene Vinyl Acetate Copolymer as the Encapsulant
Shan Jiang, Kemin Wang, Hongwen Zhang, Yonghong Ding and Qiang Yu
Article first published online: 27 MAR 2015 | DOI: 10.1002/mren.201400065
This article pays special attention to research work on improving the performance of EVA encapsulation films of photovoltaic (PV) modules, including the aging resistance, adhesive strength, and energy conversion efficiency. β-Diketone macromolecular complexes are synthesized and doped into EVA film to increase the photovoltaic conversion efficiency and service life of EVA films.