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Publication Detail
Ion-sensitive "isothermal" responsive polymers prepared in water.
  • Publication Type:
    Journal article
  • Publication Sub Type:
    Journal Article
  • Authors:
    Magnusson JP, Khan A, Pasparakis G, Saeed AO, Wang W, Alexander C
  • Publication date:
    20/08/2008
  • Pagination:
    10852, 10853
  • Journal:
    J Am Chem Soc
  • Volume:
    130
  • Issue:
    33
  • Status:
    Published
  • Country:
    United States
  • Language:
    eng
  • Keywords:
    Ions, Methacrylates, Micelles, Molecular Structure, Particle Size, Phase Transition, Polyethylene Glycols, Salts, Sensitivity and Specificity, Temperature, Time Factors, Water
Abstract
Ion-sensitive responsive polymers are prepared under fully aqueous conditions using controlled radical polymerization. Variations in comonomer content and sequence lead to temperature and salt-dependent solution behavior, with cloud-points ranging by +/-40 degrees C following addition of Hofmeister series salts. A "hybrid" block copolymer, composed of a statistical sequence of monomers tipped with a hydrophilic block, formed stable micelle-like assemblies that exhibited burst release of an encapsulated model drug in response to addition of a kosmotrope, Na2SO4, at room temperature.
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