Journal of Polymer Science Part A: Polymer Chemistry
Copyright © 2012 Wiley Periodicals, Inc., A Wiley Company
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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- 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
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.
- 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
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.
- 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
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.
- You have free access to this contentFunctional aqueous assemblies of linear-dendron hybrids
Greg Whitton and Elizabeth R. Gillies
Article first published online: 30 JUL 2014 | DOI: 10.1002/pola.27316
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.
- 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
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.