Polymer Bulletin

, Volume 67, Issue 1, pp 141–158

A novel hydrophobically associating polyampholytes of poly(AM/AA/AMQC12): preparation, characterization, and solution properties

  • Huiyong An
  • Cuige Lu
  • Pixin Wang
  • Wenbo Li
  • Ying Tan
  • Kun Xu
  • Chang Liu
Article

Abstract

A novel hydrophobically associating polyampholytes of poly(AM/AA/AMQC12) were synthesized by the free radical copolymerization of acrylamide (AM), acrylic acid (AA), and dimethyldodecyl(2-acrylamidoethyl)ammonium bromide (AMQC12) in water without any surfactants (named AAQ series). The structures of polymers were confirmed by 1H NMR and 13C NMR. The molecular weight and polydispersity were obtained using gel permeation chromatography (GPC). The hydrophobically associated properties of polymer solution were characterized by rheology, steady-state fluorescence probe, and 1H NMR relaxation time (T2). Isoelectric points (IEPs) of polymer solution were determined by the effect of pH on viscosity below critical association concentrations (cac), and the reduced viscosities of samples at IEPs were increased in the presence of NaCl. Moreover, the steady-shear viscosity of sample at IEP was also greatly enhanced in NaCl solutions when the polymer concentration is above the cac. Meantime, the storage modulus and the loss modulus of copolymers showed that the sample behaved as gel in salt media.

Keywords

Water-soluble polymers Hydrophobic association Polyampholyte Stimuli-sensitive polymers Rheology 

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Copyright information

© Springer-Verlag 2011

Authors and Affiliations

  • Huiyong An
    • 1
    • 2
    • 3
  • Cuige Lu
    • 1
    • 3
  • Pixin Wang
    • 1
  • Wenbo Li
    • 1
    • 3
  • Ying Tan
    • 1
  • Kun Xu
    • 1
  • Chang Liu
    • 1
  1. 1.Key Laboratory of Polymer EcomaterialsChangchun Institute of Applied Chemistry, Chinese Academy of SciencesChangchunPeople’s Republic of China
  2. 2.Liaoning SHIHUA UniversityFushunPeople’s Republic of China
  3. 3.Graduate University of Chinese Academy of SciencesBeijingPeople’s Republic of China

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