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Keywords:

  • gamma radiation;
  • copolymerization;
  • hydrogel;
  • acrylamide;
  • 2-acrylamido-2-methylpropane sulfonic acid

Abstract

Poly(acrylamide-co-2-acrylamido-2-methylpropane sulfonic acid) hydrogels were synthesized using gamma-radiation-initiated polymerization. The progress of copolymerization and crosslinking was observed by viscosity measurement on reaction mixtures subjected to varying radiation doses. The copolymer gels were characterized by differential scanning calorimetry, X-ray diffraction, scanning electron microscopy, infrared spectroscopy, and elemental analysis. The swelling behavior and other properties of the gels were found to be very similar to those of poly(acrylamide-co-2-acrylamido-2-methylpropane sulfonic acid) hydrogels synthesized using conventional free-radical initiation in the presence of crosslinkers. © 2003 Wiley Periodicals, Inc. J Appl Polym Sci 89: 1322–1330, 2003