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
- Mechanically Tailored Agarose Hydrogels through Molecular Alloying with β-Sheet Polysaccharides
Aurelien Forget, Raphaelle-Anne Pique, Vincent Ahmadi, Steffen Lüdeke and V. Prasad Shastri
Article first published online: 22 SEP 2014 | DOI: 10.1002/marc.201400353
Hydrogels with tunable mechanical properties are of major importance for studying cell biology in a tri-dimensional environment. The present work describes an alternative to chemical crosslinking through blending of two polysaccharides of different secondary structures. Through control of the β-sheet distribution and overall content, stiffness, topography, and fiber architecture of the resulting hydrogel can be tailored.
- Utilizing Stretch-Tunable Thermochromic Elastomeric Opal Films as Novel Reversible Switchable Photonic Materials
Christian G. Schäfer, Christina Lederle, Kristina Zentel, Bernd Stühn and Markus Gallei
Article first published online: 22 SEP 2014 | DOI: 10.1002/marc.201400421
A facile approach for the preparation of novel thermoresponsive spherical particle architectures as starting material for photonic bandgap materials is reported. By taking advantage of the melt-shear organization process and subsequent spatial UV-induced crosslinking strategies, elastomeric poly(diethylene glycol methylether methacrylate)-based opal films are produced and investigated with regard to their excellent thermochromic properties.
- Water-Based Adhesives with Tailored Hydrophobic Association: Dilution Resistance and Improved Setting Behavior
Alexander Dundua, Katharina Landfester and Andreas Taden
Article first published online: 22 SEP 2014 | DOI: 10.1002/marc.201400391
Water-soluble model additives are employed to adjust the viscoelastic properties of hydrophobically modified alkali-soluble latexes. Response of the rheological and mechanical properties upon dilution with water is tailored and dilution resistant systems are obtained. General structure–property relationships are provided to improve the setting behavior of respective water-based adhesive systems.
- First Acyclic Diene Metathesis Polymerization Under Biphasic Conditions Using a Dicationic Ruthenium Alkylidene: Access to High-Molecular-Weight Polymers with Very Low Ruthenium Contamination
Jing Zhao, Dongren Wang, Benjamin Autenrieth and Michael R. Buchmeiser
Article first published online: 19 SEP 2014 | DOI: 10.1002/marc.201400413
The acyclic diene metathesis (ADMET) polymerization of polar dienes by the action of the dicationic ruthenium alkylidene [Ru(DMF)3(1,3-dimesitylimidazolin-2-ylidene)(CH-2-(2-PrO-C6H4)2+ 2BF4−] under biphasic conditions using 1-butyl-2,3-dimethylimidazolium tetrafluoroborate and 1,2,4-trichlorobenzene allows for the high yield synthesis of high-molecular-weight polymers ( ≤ 40 000 g mol−1, yields ≤ 99%). Ru-contamination of the polymers without any additional purification is as low as 1.2 ppm.