Journal of Polymer Science Part A: Polymer Chemistry

Cover image for Vol. 53 Issue 17

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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  1. 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

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    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.

  2. 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

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    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.

  3. Free radical polymerization of caffeine-containing methacrylate monomers

    Ashley M. Nelson, Sean T. Hemp, Jessica Chau and Timothy E. Long

    Article first published online: 28 JUL 2015 | DOI: 10.1002/pola.27756

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    A two-step synthesis involving a UV-induced photoreaction transformed the renewable resource caffeine into a polymerizable methacrylate. Free radical polymerization with 2-ethylhexyl methacrylate afforded novel copolymers containing covalently bound pendant caffeine. 1H NMR and UV-vis absorbance spectroscopy confirmed caffeine incorporation and SEC elucidated high molecular weight copolymers resulted. Caffeine increased both the glass transition temperature and modulus of the copolymers at low mol % incorporation revealing the potential for caffeine as a comonomer in thermoplastic elastomers.

  4. Synthesis of traditional and ionic polymethacrylates by anion catalyzed group transfer polymerization

    Veronika Strehmel and Volker Senkowski

    Article first published online: 28 JUL 2015 | DOI: 10.1002/pola.27760

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    Group transfer polymerization of ionic liquid methacrylates bearing the same anion as the hydrophobic ionic liquid used as solvent occurs more efficient compared to traditional methacrylates. The hydrophobic ionic liquid solvent influences group transfer polymerization of both traditional and ionic liquid methacrylates. The anion of the ionic liquid derives from a super acid. The ionic liquid additionally shows catalytic activity.

  5. Fabric-hydrogel composite membranes for culturing microalgae in semipermeable membrane-based photobioreactors

    Seung-Yong Lee, Z-Hun Kim, Hwa Yeon Oh, Younghoon Choi, Hanwool Park, Daewoo Jung, Jong-Min Kim, Yang Ho Na, Sang-Min Lim, Choul-Gyun Lee and Jin-Kyun Lee

    Article first published online: 28 JUL 2015 | DOI: 10.1002/pola.27770

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    Fabric-hydrogel composite membranes (FHCMs) are proposed as semipermeable materials for the construction of photobioreactors. A cotton fabric inside the hydrogel matrix endows the composite with tensile strength, which enables casting of FHCMs into thin membranes. In permeability coefficient measurements of inline image ions, it reached as high as 1.2 × 10−8 m2 min−1. In microalgal culture, a photobioreactor with a FHCM could maintain sufficient inline image ion concentration and pH of the culture broth, supporting microalgal growth.