Macromolecular Chemistry and Physics
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Materials Science Weekly Newsletter
Recently Published Articles
- Effect and Evolution of Nanostructural Complexity in Sensitive Polymer Gels
Article first published online: 31 OCT 2014 | DOI: 10.1002/macp.201400410
Sensitive and supramolecular polymer gels can be selectively swollen and deswollen or gelled and degelled in response to external stimulation; to truly benefit from this ability, the impact of nanometer-scale structural heterogeneity in the constituent polymer networks must be understood and accounted for in materials design.
- Programmable Polymer Memory Device Based on Hydrophilic Polythiophene and Poly(ionic liquid) Electrolyte
Yueqin Li, Yang Song, Xiyu Zhang, Xiangxiang Wu, Fang Wang and Zhuye Wang
Article first published online: 31 OCT 2014 | DOI: 10.1002/macp.201400432
Three-terminal memory devices based on hydrophilic polythiophene (P3CPT) and poly(ionic liquid) (PVBIT) electrolyte are fabricated through a simple solution-processing technique. Research on memory characteristics indicates that this system possesses very stable ON- and OFF-states under the low operating voltage of ±3 V. The write–read–erase–read cycles can be up to 100 and the retention is over 1.6 × 104 s.
- Effects of Isophorone Diisocyanate on the Thermal and Mechanical Properties of Shape-Memory Polyurethane Foams
Sayyeda M. Hasan, Jeffery E. Raymond, Thomas S. Wilson, Brandis K. Keller and Duncan J. Maitland
Article first published online: 30 OCT 2014 | DOI: 10.1002/macp.201400407
Porous, low-density shape-memory polymers are developed with tunable transition temperatures and actuation rates by altering the polymer backbone from trimethyl-1,6-hexamethylene diisocyanate (a) to isophorone diisocyanate (b) at varying concentrations.
- LED-Induced Polymerization (385, 405, and 455 nm) Using Star-Shaped Tris(4-(thiophen-2-yl)phenyl)amine Derivatives as Light-Harvesting Photoinitiators
Jing Zhang, Xavier Sallenave, Thanh-Tuan Bui, Frédéric Dumur, Pu Xiao, Bernadette Graff, Didier Gigmes, Jean Pierre Fouassier and Jacques Lalevée
Article first published online: 29 OCT 2014 | DOI: 10.1002/macp.201400403
Two new light-harvesting photoinitiators for radical and cationic polymerizations under near-UV and visible light emitting diodes (LEDs) are proposed. These systems are also interesting for overcoming oxygen inhibition. The photochemical mechanisms are studied by steady-state photolysis, electron spin resonance spin trapping, fluorescence, cyclic voltammetry, and laser flash photolysis techniques.
- Characterization of the Chemical Composition Distribution of Poly(n-butyl acrylate-stat-acrylic acid)s
Helena Maier, Frank Malz and Wolfgang Radke
Article first published online: 29 OCT 2014 | DOI: 10.1002/macp.201400399
A chromatographic method is presented which allows poly(n-butyl acrylate-stat-acrylic acid)s to be separated with respect to the content of acrylic acid over the complete composition range. The applied SEC-gradient allows the determination of the chemical composition distribution. Samples of similar compositions prepared in different solvents exhibit differences in chemical composition distribution.