Macromolecular Materials and Engineering

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Recently Published Articles

  1. Anisotropic Supports in Metallocene-Catalyzed Polymerizations: Templates to Obtain Polyolefin Fibers

    Daejune Joe, Florian E. Golling, Kathrin Friedemann, Daniel Crespy, Markus Klapper and Klaus Müllen

    Article first published online: 23 APR 2014 | DOI: 10.1002/mame.201300435

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    Polyethylene nanofibers are prepared by metallocene-catalyzed polymerization on anisotropic supports. The supports are fabricated by electrospinning functionalized polystyrene nanoparticles and subsequent loading with the catalyst. The diameter of the obtained fibers is controlled by the polymerization time.

  2. The Thermal Behavior of Polylactide with Different D-Lactide Content in the Presence of Dissolved CO2

    Mohammadreza Nofar, Aboutaleb Ameli and Chul B. Park

    Article first published online: 22 APR 2014 | DOI: 10.1002/mame.201300474

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    High D-lactide content PLA cannot crystallize even under high-pressure CO2. Crystallization rate of the other PLAs with medium and low D-lactide contents increases by increasing the amount of dissolved CO2 and by reducing the D-lactide contents. But their final crystallinity behaves differently under various CO2 pressures. As cooling rate increases, maximum achieved crystallinity appears at higher CO2 pressures.

  3. Flow-Induced Coalescence in Polydisperse Systems

    Ivan Fortelný and Josef Jůza

    Article first published online: 17 APR 2014 | DOI: 10.1002/mame.201400050

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    The theory of coalescence in polymer blends containing droplets polydisperse in size is derived. The dependence of coalescence efficiency on average droplet radius differs strongly from that for monodisperse systems commonly used for interpretation of experiments. It has a strong impact on description of the phase structure evolution in flowing polymer blends.

  4. Effect of Particle Size and Shape on the Reinforcing Efficiency of Nanoparticles in Polymer Nanocomposites

    Hojjat Mahi Hassanabadi and Denis Rodrigue

    Article first published online: 17 APR 2014 | DOI: 10.1002/mame.201300442

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    By rheological and mechanical analyses, the effect of five different nanoparticles, including clay nanocrystalline cellulose, multiwall carbon nanotube, talc, and CaCO3, on polymer dynamics in the melt and solid state is investigated. Furthermore, considering their effect on rheological and mechanical properties, the particles are compared based on a cost-to-performance ratio.

  5. Toward In Situ Compatibilization of Polyolefin Ternary Blends through Morphological Manipulations

    Reza Khalili, Seyed Hassan Jafari, Mohammad Reza Saeb, Hossein Ali Khonakdar, Udo Wagenknecht and Gert Heinrich

    Article first published online: 14 APR 2014 | DOI: 10.1002/mame.201300452

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    The compatibilizing action of PP and HDPE constituents in their corresponding 75/(25) ternary blends with PA6 is evaluated by varying the type of continuous phase and weight fraction in minority phase. Tensile and impact properties are traced to infer morphological transitions from partial encapsulation to matrix/shell/core type morphology.