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
- Super Hydrogen and Helium Barrier with Polyelectolyte Nanobrick Wall Thin Film
Ping Tzeng, Elva L. Lugo, Garret D. Mai, Benjamin A. Wilhite and Jaime C. Grunlan
Article first published online: 27 NOV 2014 | DOI: 10.1002/marc.201400559
A 122 nm layer-by-layer (LbL) coating on polystyrene is shown to lower both hydrogen and helium permeability three orders of magnitude against bare polystyrene. This highly flexible coating represents the first demonstration of an LbL-deposited film with low hydrogen and helium permeability and is an ideal candidate for several packaging and protection applications.
- Strategic Modulation of the Photonic Properties of Conjugated Organometallic Pt–Ir Polymers Exhibiting Hybrid CT-Excited States
Ahmed M. Soliman, Eli Zysman-Colman and Pierre D. Harvey
Article first published online: 27 NOV 2014 | DOI: 10.1002/marc.201400542
The replacement of X = H by F conveniently induces a blue shift of the absorption and emission bands arising from the hybrid-excited CT states compensating for the red shifting effect due to conjugation, and also decreases the emission quantum yields and lifetimes at 298 and 77 K.
- Thermorheological and Mechanical Properties of Copolymers of Lactide, Isosorbide, and Different Phthalic Acids
Zucong Zhang, Hans Rytger Kricheldorf and Christian Friedrich
Article first published online: 27 NOV 2014 | DOI: 10.1002/marc.201400489
The mechanical properties of selected copolymer samples are characterized by tensile tests and compared to a commercial poly(methyl methacrylate) (PMMA) sample (=100.000 g mol−1). In this case, nonlinear mixing rules are found regarding the Young's modulus in dependence of different phthalates contents.
- Temperature-Triggered Phase Separation of a Hydrophilic Resilin-Like Polypeptide
Linqing Li, Tianzhi Luo and Kristi L. Kiick
Article first published online: 26 NOV 2014 | DOI: 10.1002/marc.201400521
Hydrophilic resilin-like polypeptides: solutions of recombinant resilin-like polypeptides exhibit phase separation and form nanoparticles with increasing temperatures. The transition temperature and particles sizes can be modulated via salt identity, ionic strength, pH, and denaturants.
- Star-Pseudopolyrotaxane Organized in Nanoplatelets for Poly(ε-caprolactone)-Based Nanofibrous Scaffolds with Enhanced Surface Reactivity
Murielle Oster, Anne Hébraud, Sébastien Gallet, Alain Lapp, Eric Pollet, Luc Avérous and Guy Schlatter
Article first published online: 25 NOV 2014 | DOI: 10.1002/marc.201400533
Star pseudopolyrotaxanes of α-cyclodextrin and star poly(ε-caprolactone) form stable nanoplatelet micelles in dimethyl sulfoxide and are subsequently processed by coaxial electrospinning to obtain poly(ε-caprolactone):star pseudopolyrotaxanes core:shell fibers. The star pseudopolyrotaxanes shell ensures the presence of α-cyclodextrin hydroxyl functions on the fiber surface allowing efficient postfunctionalization while keeping intact the entire morphology of the fibrous scaffold in solvents.