Macromolecular Chemistry and Physics
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Materials Science Weekly Newsletter
Recently Published Articles
- Cation Effects on the Phase Transition of N-isopropylacrylamide Hydrogels
Kevin J. Pastoor and Charles V. Rice
Article first published online: 4 MAR 2015 | DOI: 10.1002/macp.201400573
High-resolution magic angle spinning nuclear magnetic resonance spectroscopy is used to study the phase transition in N-isopropylacrylamide hydrogels. Sodium, magnesium, and calcium ions alter the thermodynamics and lower the critical solution temperature. Rehydration of the collapsed gel is facilitated by calcium ions, but magnesium hinders the formation of a water solvation sphere. Sodium, however, has little impact on the ability of water to break up the hydrophobic domains.
- Synthesis, Properties, and Doping Behavior of Optically Active Polythiophenes Bearing a Bornyl Group
Atsushi Matsumura, Kohsuke Kawabata and Hiromasa Goto
Article first published online: 3 MAR 2015 | DOI: 10.1002/macp.201400594
Polythiophenes bearing a bornyl group as a side chain are synthesized. The polymers form chiral aggregations, despite steric hindrance of spherical side chains. Iodine doping generates charge carriers. The study of chiroptical properties and doping behavior indicates the generation of chiral charge carriers, referred to as “chiralions.”
- Condensed Mode Cooling for Ethylene Polymerization: Part II. The Effect of Different Condensable Comonomers and Hydrogen on Polymerization Rate
Arash Alizadeh, Montree Namkajorn, Ekasith Somsook and Timothy F. L. McKenna
Article first published online: 2 MAR 2015 | DOI: 10.1002/macp.201500023
A systematic methodology is proposed for evaluation of the impact of the physical and chemical phenomena during gas phase ethylene copolymerization with comonomers. In addition, the effect of inert n-hexane on the rate of gas phase ethylene polymerization, both in the absence and presence of 1-hexene and hydrogen, is investigated, illustrating the counter-effects of the physical and chemical phenomena during this process.
- You have free access to this contentMacromol. Chem. Phys. 5/2015 (page 469)
Yuyan Li, Bo Peng and Yongming Chen
Article first published online: 2 MAR 2015 | DOI: 10.1002/macp.201570014
Front Cover: Bulk self-assembly of polystyrene-block-poly(N-isopropylacrylamide) (PS-b-PNIPAM) is shown to form microphase-separated films. After dispersing the films in ethanol, nanocylinders stabilized by polystyrene cores were obtained. These kinetically trapped nanocylinders exhibited thermo-/ultrasound-responsive shape transition properties. The transition process could be modulated by the balance between energy input and kinetic barrier. Further details can be found in the article by Y. Li, B. Peng,* and Y. Chen* on page 495.
- Macromol. Chem. Phys. 5/2015 (page 584)
Lijia Liu, Qing Long, Toshiki Aoki, Takeshi Namikoshi, Yunosuke Abe, Mari Miyata, Masahiro Teraguchi, Takashi Kaneko, Yudan Wang and Chunhong Zhang
Article first published online: 2 MAR 2015 | DOI: 10.1002/macp.201570017
Back Cover: A one-handed helical supramolecular polymer membrane of 1,3,5-trisubstituted benzenes was successfully prepared via the quantitative photocyclic aromatization reaction of a cis-cisoidal poly(chiral substituted acetylene) membrane. The resulting one-handed supramolecular helicity of the resulting polymer membrane could be retained even after in situ removal of the chiral substituents in the membrane. Further details can be found in the article by L. Liu,* Q. Long, T. Aoki,* T. Namikoshi, Y. Abe, M. Miyata, M. Teraguchi, T. Kaneko, Y. Wang, and C. Zhang on page 530.