Journal of Polymer Science Part A: Polymer Chemistry
Copyright © 2012 Wiley Periodicals, Inc., A Wiley Company
Impact Factor: 3.113
ISI Journal Citation Reports © Ranking: 2014: 18/82 (Polymer Science)
Online ISSN: 1099-0518
Associated Title(s): Journal of Polymer Science Part B: Polymer Physics
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- Dendritic hydrogels: From exploring various crosslinking chemistries to introducing functions and naturally abundant resources
Surinthra Mongkhontreerat, Oliver C. J. Andrén, Assya Boujemaoui and Michael Malkoch
Article first published online: 31 JUL 2015 | DOI: 10.1002/pola.27750
Dendritic hydrogels from dendritic-linear-dendritic (DLD) block copolymers based on PEG and bis-MPA dendrons were constructed via UV-initiated thiol-ene, thiol-yne, CuAAC, and amine-NHS crosslinking chemistries. Stoichiometric ratio manipulations, prior to film formation, resulted in functional hydrogels with tuneable compressive moduli. The highest gel fractions for all networks were obtained at off-stoichiometric ratios with surplus of DLDs. Finally, sustainable networks were fabricated by amalgamating DLD, naturally abundant cellulose nanocrystal, and protein-based bovine serum albumin.
- A facile synthesis of catechol-functionalized poly(ethylene oxide) block and random copolymers
Kaila M. Mattson, Allegra A. Latimer, Alaina J. McGrath, Nathaniel A. Lynd, Pontus Lundberg, Zachary M. Hudson and Craig J. Hawker
Article first published online: 31 JUL 2015 | DOI: 10.1002/pola.27749
A modular strategy, starting from readily available methyl eugenol, to imbed protected catecholic moieties at controlled levels within polyethers is presented. This simple, high-yielding synthesis represents the first time catechols have been controllably dispersed throughout polyethylene oxide (PEO)-based polymer backbones. The precise tunability afforded by this system can enable systematic investigation of the effects that variables such as molecular weight, catechol incorporation, and catechol location can have on surface-anchored PEO.
- Photochemical stability of dicyano-substituted poly(phenylenevinylenes) with different side chains
Logan P. Sanow, Jianyuan Sun and Cheng Zhang
Article first published online: 31 JUL 2015 | DOI: 10.1002/pola.27755
The photodegradation mechanism study has been conducted on poly(2,5-dioctyl-1,4-phenylene-1,2-dicyanovinylene) (C8-diCN-PPV) and poly[2,5-bis(decyloxy)−1,4-phenylene-1,2-dicyanovinylene] (RO-diCN-PPV) to understand the reason behind the faster photodegradation of C8-diCN-PPV which has a lower LUMO. In both polymers, radical superoxide anion mechanism, which is responsible for electron-rich RO-PPVs, is found to be energetically unfavorable due to diCN substitution. Combined IR, UV–vis, photoluminescence, and phosphorescence spectroscopies study indicates that singlet oxygen is the main culprit for photodegradation of both polymers.
- A visible light responsive azobenzene-functionalized polymer: Synthesis, self-assembly, and photoresponsive properties
Guojie Wang, Dong Yuan, Tingting Yuan, Jie Dong, Ning Feng and Guoxiang Han
Article first published online: 29 JUL 2015 | DOI: 10.1002/pola.27747
An amphiphilic tetra-o-methoxy-substituted-azobenzene-functionalized poly(acrylic acid) was synthesized via the postpolymerization modification method, which can exhibit the trans-to-cis photoswitching under green light irradiation at 520 nm and the cis-to-trans photoswitching under blue light irradiation at 420 nm in both solution and aggregate state. The fluorescence of loaded Nile Red in the self-assembled polymer nanoparticles can be tuned upon the visible light irradiation.
- Graft modification of crystalline nanocellulose by Cu(0)-mediated SET living radical polymerization
Hai-Dong Wang, Ryan D. Roeder, Ralph A. Whitney, Pascale Champagne and Michael F. Cunningham
Article first published online: 28 JUL 2015 | DOI: 10.1002/pola.27754
Cu(0)-catalyzed SET living radical polymerization was used to graft poly(methyl acrylate) from a crystalline nanocellulose (CNC) surface. The polymer grafting step process exhibits fast polymerization kinetics and a very low level of copper consumption. The resulting polymerization medium is clear with almost no color, indicating low dissolved copper concentrations.