Macromolecular Rapid Communications
Copyright © 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
Editors: Kirsten Severing , Stefan Spiegel
Online ISSN: 1521-3927
Materials Science Weekly Newsletter
Recently Published Articles
- 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
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.
- 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
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.
- pH-Switchable Self-Assembled Materials
Hendrik Frisch and Pol Besenius
Article first published online: 22 DEC 2014 | DOI: 10.1002/marc.201400623
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.
- 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
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.
- 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
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.