Macromolecular Reaction Engineering

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Recently Published Articles

  1. 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

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    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.

  2. 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

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    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.

  3. 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

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    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.

  4. 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

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    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.

  5. 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

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    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.