Macromolecular Rapid Communications

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Recently Published Articles

  1. Morphological Investigation of Midblock-Sulfonated Block Ionomers Prepared from Solvents Differing in Polarity

    Kenneth P. Mineart, Xi Jiang, Hiroshi Jinnai, Atsushi Takahara and Richard J. Spontak

    Article first published online: 23 DEC 2014 | DOI: 10.1002/marc.201400627

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    The morphological features of midblock-sulfonated pentablock ionomers cast from solvents differing in polarity are analyzed by transmission electron microscopy and microtomography. In all cases, the solvent effectively templates the morphology generated in dried films: a nonpolar solvent produces dispersed ion-rich microdomains and a polar solvent promotes the formation of a mixed morphology with a continuous ion-rich pathway.

  2. Characterization of Local Elastic Modulus in Confined Polymer Films via AFM Indentation

    Xu Cheng, Karl W. Putz, Charles D. Wood and L. Catherine Brinson

    Article first published online: 23 DEC 2014 | DOI: 10.1002/marc.201400487

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    This paper demonstrates that a systematic method based on AFM indentation is developed to investigate modulus variations inside sub-micron ranges with a resolution of 2–3 nm. Through this novel method, the full gradient of modulus changes inside the polymer interphase induced by confinement effects has been clearly revealed for the first time, showing great potential in research of nanolevel local mechanical properties.

  3. pH-Switchable Self-Assembled Materials

    Hendrik Frisch and Pol Besenius

    Article first published online: 22 DEC 2014 | DOI: 10.1002/marc.201400623

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    pH stimuli are exciting triggers for the fabrication of responsive soft matter in water. Herein, it is focused on illustrating most recent examples that have appeared in the literature over the last four years: the controlled self-assembly of programmable supramolecular materials based on polymeric, molecular subunits, as well as building blocks derived from biological macromolecules are discussed.

  4. The Self-Healing Potential of Triazole-Pyridine-Based Metallopolymers

    Benedict Sandmann, Bobby Happ, Stephan Kupfer, Felix H. Schacher, Martin D. Hager and Ulrich S. Schubert

    Article first published online: 22 DEC 2014 | DOI: 10.1002/marc.201400468

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    Metallopolymers can be used to construct self-healing materials. A bidentate triazole-pyridine (TRZ-py) ligand is attached to a lauryl methacrylate backbone. By cross-linking the resulting polymer with different Fe(II) and Co(II) salts, a material with promising self-healing performance can be obtained.

  5. Self-Regulation in Flow-Induced Structure Formation of Polypropylene

    Peter C. Roozemond, Martin van Drongelen, Zhe Ma, Anne B. Spoelstra, Daniel Hermida-Merino and Gerrit W. M. Peters

    Article first published online: 17 DEC 2014 | DOI: 10.1002/marc.201400505

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    Subjecting a polymer melt below its melting point to high shear stress can create strongly oriented crystal structures. It is shown that, in channel flow, this crystalline structure does not depend on spatial coordinate or flow condition due to a self-regulating effect, as evidenced by the crystallization kinetics.