Journal of Polymer Science Part A: Polymer Chemistry

Cover image for Vol. 52 Issue 19

Impact Factor: 3.543

ISI Journal Citation Reports © Ranking: 2012: 12/83 (Polymer Science)

Online ISSN: 1099-0518

Associated Title(s): Journal of Polymer Science Part B: Polymer Physics

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  1. Photoresponsive polymers and block copolymers by molecular recognition based on multiple hydrogen bonds

    Alberto Concellón, Eva Blasco, Milagros Piñol, Luis Oriol, Isabel Díez, Cristina Berges, Carlos Sánchez-Somolinos and Rafael Alcalá

    Article first published online: 30 AUG 2014 | DOI: 10.1002/pola.27373

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    The preparation of a series of photoaddressable supramolecular materials is demonstrated by mixing different polymers, which contain 2,6-diacylaminopyridine derivative units, and azobenzene chromophores having thymine (tAZO) or carboxylic groups with a dendritic structure (dAZO), which can form either three or two hydrogen bonds with the 2,6-diacylaminopyridine groups, respectively. Homogeneous materials are obtained with full complexation degrees without showing macrophase separation. We have also studied thermal, optical and assembly properties of these supramolecular materials.

  2. Stabilization and functionalization of single-walled carbon nanotubes with polyvinylpyrrolidone copolymers for applications in aqueous media

    Brian V. Popp, Dillon H. Miles, Jake A. Smith, Irene M. Fong, Matteo Pasquali and Zachary T. Ball

    Article first published online: 30 AUG 2014 | DOI: 10.1002/pola.27365

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    Polyvinylpyrrolidone copolymers permit the synthesis of carbon nanotubes that are stable to significant pH gradients, allowing noncovalent functionalization with dye molecules and control over surface charge.

  3. Polarity reversal of nanoparticle surfaces by the use of light-sensitive polymeric emulsifiers

    Robert Dorresteijn, Nils Billecke, Sapun H. Parekh, Markus Klapper and Klaus Müllen

    Article first published online: 30 AUG 2014 | DOI: 10.1002/pola.27363

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    A polarity reversal of a nanoparticle surface with a light-sensitive PEG-block-poly((1-pyrenyl methyl)glutamate) (PEG-b-PGlu(Pyr)) copolymer is presented. The copolymer is successfully applied as emulsifier in a nonaqueous emulsion polymerization of lactide. The hydrophobic pyrenyl methylene units are readily cleaved from the outer hydrophilic PGlu-block by UV irradiation. The initially hydrophobic particles can now be dispersed in aqueous medium without the need of additional surfactants.

  4. Design of high-χ block copolymers for lithography

    William J. Durand, Gregory Blachut, Michael J. Maher, Stephen Sirard, Summer Tein, Matthew C. Carlson, Yusuke Asano, Sunshine X. Zhou, Austin P. Lane, Christopher M. Bates, Christopher J. Ellison and C. Grant Willson

    Article first published online: 30 AUG 2014 | DOI: 10.1002/pola.27370

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    Several silicon-containing block copolymers composed of styrene and its derivatives were investigated for lithographic applications. The interaction parameter (χ) of each material was estimated via two well-known techniques, demonstrating increases two to three times that of poly(styrene-block-4-trimethylsilylstyrene) upon appending various functional groups. Perpendicular-oriented thin films of BCPs were developed by reactive ion etching to demonstrate high aspect ratio patterns. Higher silicon-content components demonstrated greater etch resistance, and more strongly segregated BCPs improve pattern fidelity.

  5. Preparation and evaluation of a polymeric gel containing ionic liquid-functionalized MWCNTs as a novel class of organic solvent absorbent

    Ali Pourjavadi and Malihe Doulabi

    Article first published online: 28 AUG 2014 | DOI: 10.1002/pola.27372

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    Ionic liquid-functionalized MWCNTs consisting of vinyl immidazolium cations and lipophilic tetrafluoroborate counteranions were synthesized and used as a novel crosslinking agent for the preparation of a new absorbent gel. The prepared MWCNT-based polymeric gel (ILMPG) exhibits high organic solvent absorbency, fast organic solvent absorption rate, and good reusability. ILMPG does not swell in water and can potentially be used for cleaning oil and organic solvent spills on water.