Journal of Polymer Science Part A: Polymer Chemistry
Copyright © 2012 Wiley Periodicals, Inc., A Wiley Company
Impact Factor: 3.245
ISI Journal Citation Reports © Ranking: 2013: 14/82 (Polymer Science)
Online ISSN: 1099-0518
Associated Title(s): Journal of Polymer Science Part B: Polymer Physics
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- Synthesis of diisocyanides with phenolic groups and their polymerization to helically chiral poly(quinoxaline-2,3-diyl)s
Johannes Scholz and Michael Reggelin
Article first published online: 4 MAR 2015 | DOI: 10.1002/pola.27580
The synthesis of new diisocyanide monomers with one or two phenolic groups is described. Their polymerization ability is affected mainly by steric crowding of the diisocyanide functions by adjacent groups. With a chiral Pd-initiator a helix-sense selective polymerization is achieved and deprotection is done successfully. The obtained optically active polymers with Brønsted functionalities in each repeating unit are thought as chiral, reusable organocatalysts.
- Synthesis and optical properties of σ–π conjugated organic–inorganic hybrid gels
Naofumi Naga, Hitomi Nagino, Midori Iwashita, Tomoharu Miyanaga and Hidemitsu Furukawa
Article first published online: 4 MAR 2015 | DOI: 10.1002/pola.27571
Organic–inorganic hybrid gels containing Si-vinylene units have been synthesized by a hydrosilylation reaction of tri- or tetra-ethynyl aryl compounds, TEB, TEBP, or TEPM, and bisdimethylsilyl compounds, TMDS or BDMSB, in toluene. The reactions yielded the gels having homogeneous network structure of 1.5–2.9 nm mesh size under the monomer concentrations that were relatively higher than the critical gelation concentration. The gels showed emission in the ranged from 350 to 500 nm.
- Optimizing the electrochemical performance of imidazolium-based polymeric ionic liquids by varying tethering groups
Zhe Jia, Wen Yuan, Chunjuan Sheng, Hui Zhao, Heyi Hu and Gregory L. Baker
Article first published online: 4 MAR 2015 | DOI: 10.1002/pola.27567
The synthesis and characterization of novel imidazolium-based ionic liquid (IL) model compounds and corresponding polymeric ionic liquidILs (PILs) with various tethering groups were reported. Poly(ethylene oxide) (PEO) repeating units were attached as tethering groups to the imidazolium cation to optimize the glass transition temperatures (Tg) and ionic conductivities of the PILs. The novel PILs exhibit excellent conductivity. The thermophysical and electrochemical properties of ILs, including thermal transition, ionic conductivity, and rheological behavior, were characterized.
- Screening of metal catalysts influence on the synthesis, structure, properties, and biodegradation of PLA-PBA triblock copolymers obtained in melt
Anna Kundys, Andrzej Plichta, Zbigniew Florjańczyk, Anita Frydrych and Konrad Żurawski
Article first published online: 4 MAR 2015 | DOI: 10.1002/pola.27576
Triblock copolymers comprising poly(1,4-butylene adipate) segment and polylactidearmswere obtained under technological conditions. Acetylacetonates of Li, Mg, Ca, Zn, Fe, and Zr were used as catalysts. The macroinitiator is incorporated into the major products; however, linear and cyclic homopolymers and copolymers are present. The efficiency of side reactions, including racemization of polylactide, depends on the catalyst used. The copolymers studied undergo faster biodegradation than polylactide and they can decompose in compost within 16 weeks.
- K+ responsive supramolecular polymer constructed by dibenzo-30-crown-10/paraquat-based molecular recognition
Rener Chen, Qizhong Zhou, Bin Zhang, Jiashou Wu, Yuyuan Ye, Guoliang Dai and Huajiang Jiang
Article first published online: 3 MAR 2015 | DOI: 10.1002/pola.27569
A supramolecular polymer constructed by dibenzo-30-crown-10/paraquat-based molecular recognition is reported. Owing to the responsiveness and reversibility of the dibenzo-30-crown-10/paraquat host−guest interactions, the reversible transition between the linear supramolecular polymer and monomers was achieved by adding K+ and DB18C6.