Journal of Polymer Science Part A: Polymer Chemistry

Cover image for Vol. 52 Issue 17

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. Self-assembly and reassembly of fiber-forming dipeptides for pH-triggered DNA delivery

    Glenn R. Hafenstine, Dylan W. Domaille, Jennifer N. Cha and Andrew P. Goodwin

    Article first published online: 31 JUL 2014 | DOI: 10.1002/pola.27319

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    Hydrazone-based conjugates of PEG-dipeptide and DNA-dipeptide were designed to form stable vesicles at neutral pH, break apart at mildly acidic pH, and form large peptide fibers on release. Light scattering measurements showed that DNA-loaded vesicles of ∼80 nm were stable at pH 7.4 for 6 h and fell apart within 1 h at pH 5, with the DNA fully released from the formed fibers.

  2. Synthesis and thermal, optical, and mechanical properties of sequence-controlled poly(1-adamantyl acrylate)-block-poly(n-butyl acrylate) containing polar side group

    Yoshinori Nakano, Eriko Sato and Akikazu Matsumoto

    Article first published online: 31 JUL 2014 | DOI: 10.1002/pola.27322

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    Thermal, optical, and mechanical properties of the adamantane-containing block copolymers consisting of poly(1-adamantyl acrylate) and poly(n-butyl acrylate) sequences, prepared by the sequence-controlled block copolymerization using organotellurium-mediated living radical polymerization, are described. The increases in the glass transition temperatures and activation energies due to the formation of intermolecular hydrogen bonding by the introduction of polar repeating units as well as their effects on the tensile elasticity, strength, and strain are discussed.

  3. Bulk dispersion of single-walled carbon nanotubes in silicones using diblock copolymers

    Ryan C. Chadwick, Darryl Fong, Nicole A. Rice, Michael A. Brook and Alex Adronov

    Article first published online: 30 JUL 2014 | DOI: 10.1002/pola.27313

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    Supramolecular complexes of poly(3-decylthiophene)-block-polydimethylsiloxanes (P3DT-b-PDMS) with single-walled carbon nanotubes (SWNTs) enable homogeneous incorporation of SWNTs within a bulk silicone elastomer, resulting in a low percolation threshold. The block copolymer anchors SWNTs within the silicone elastomer, allowing repeated stretching and relaxation without degradation of conductivity.

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    Functional aqueous assemblies of linear-dendron hybrids

    Greg Whitton and Elizabeth R. Gillies

    Article first published online: 30 JUL 2014 | DOI: 10.1002/pola.27316

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    Recent progress on the development of aqueous assemblies of linear-dendron hybrids capable of performing functions is described. By engineering chemical functionalities in the linear or dendritic component, as well as their architectures, a wide variety of functions—including drug encapsulation, cell targeting, lectin binding, hydrogel formation, and catalysis—can be introduced. In addition, the assemblies can be designed to respond to a variety of stimuli including pH, temperature, light, and enzymes.

  5. Effects of polyethylene spacer length in polymeric electrolytes on gelation of ionic liquids and ionogel properties

    Jun'ichi Nagasawa, Sonoko Wakahara, Hajime Matsumoto, Hideyuki Kihara and Masaru Yoshida

    Article first published online: 28 JUL 2014 | DOI: 10.1002/pola.27310

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    Positively charged polyelectrolytes with N,N′ -(trans-cyclohexane-1,4-diyl)dibenzamide linkages and varying spacer lengths have been synthesized and their ability to effect gelation for six ionic liquids and the properties of the resulting ionogels have been examined. The polymers gelatinize most of the tested ionic liquids at low concentrations (0.9-50 g/L). Gel-sol transition temperatures are dependent on the spacer length, while ionic conductivities of the various ionogels are near those of the neat ionic liquids and are not affected by spacer length.

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