Journal of Polymer Science Part A: Polymer Chemistry

Cover image for Vol. 52 Issue 23

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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  1. Synthesis and characterization of high nitrile content polyimides as dielectric films for electrical energy storage

    David H. Wang, Brian A. Kurish, Imre Treufeld, Lei Zhu and Loon-Seng Tan

    Article first published online: 30 OCT 2014 | DOI: 10.1002/pola.27445

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    In the polyimide films, an increase in dipole moment density by the presence of three neighboring CN per repeat unit can increase relative permittivity. Polarization response results implicate that (i) an increase in the number of CN dipoles is insufficient in elevating permittivity proportionally without cooperative alignment of the multiple dipoles; (ii) paraphenylene is more effective than meta-phenylene in enhancing relative permittivity probably because of its greater facility in sub-Tg mobility (“ring flipping”) that aids such cooperative dipole alignment with applied electric field.

  2. Organic nanoparticles as fragmentable support for Ziegler–Natta catalysts

    Sven Nietzel, Daejune Joe, Joseph W. Krumpfer, Frank Schellenberger, Abdulhamid A. Alsaygh, Gerhard Fink, Markus Klapper and Klaus Müllen

    Article first published online: 29 OCT 2014 | DOI: 10.1002/pola.27442

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    Micrometer-sized aggregates of polystyrene nanoparticles are presented as organic support materials for Ziegler–Natta catalysts. The catalytic activity in ethylene slurry polymerizations is found to be directly correlated to the hydroxyl group content of the supports. The ability to produce medium molecular weight distributions of high-density polyethylene in a one-pot, one-catalyst process in conjunction with good support fragmentability is demonstrated.

  3. Preparation, properties, and antibacterial behavior of a novel cellulose derivative containing lactam groups

    Fanny Joubert, Gary J. Sharples, Osama M. Musa, David R. W. Hodgson and Neil R. Cameron

    Article first published online: 29 OCT 2014 | DOI: 10.1002/pola.27441

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    A novel cellulose derivative is prepared by the chemical modification of hydroxyethyl cellulose with pyrrolidone groups. The new material has improved solubility, lower solution viscosity, and enhanced thermal stability compared with HEC, as well as some antibacterial properties.

  4. Toward model-driven engineering of supramolecular copolymers

    Peter A. Korevaar, Christophe Grenier and E. W. Meijer

    Article first published online: 29 OCT 2014 | DOI: 10.1002/pola.27446

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    The coassembly of two different π-conjugated oligo(p-phenylene vinylene) derivatives is studied. ROPV3 and SOPV4 have opposite chirality; where SOPV4 can easily coassemble into helices formed by ROPV3, the opposite is not true. As a result, the assemblies comprise mixed or phase-separated building blocks. The consequences of this phenomenon are demonstrated for one molecular system and the co-assembly pathways involved are analysed via a kinetic model and disclose general lessons for the development of supramolecular copolymers.

  5. Synthesis and characterization of copoly(amide triazole)s derived from d-Glucose

    Manuel Bueno-Martínez, Inmaculada Molina-Pinilla, Khalid Hakkou and Juan A. Galbis

    Article first published online: 27 OCT 2014 | DOI: 10.1002/pola.27444

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    Several degradable linear copoly(amide triazole)s have been prepared by thermal cycloaddition reaction, starting from monomers coming from natural regrowing resources. The copolymers present different characteristics like hydrophilicity, solubility, or thermal properties depending on the ratio of the monomers in the polymer chain or on the procedure used to their preparation. The copolymers present free secondary alcohol functions that were used for preparing polymeric networks.

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