Synthesis and Physical Properties of pH-sensitive Semi-IPN Hydrogels Based on Poly( dimethylaminoethyl methacrylate-co-PEG dimethacrylate) and Poly(acrylic acid)

  • Kim Goo-Myun (Hyperstructured Organic Materials Research Center and School of Materials Science and Engineering, Seoul National University) ;
  • Jo Won-Ho (Hyperstructured Organic Materials Research Center and School of Materials Science and Engineering, Seoul National University)
  • Published : 2006.09.01

Abstract

Hydrogels of semi-interpenetrating polymer networks (semi-IPNs) were prepared by two step reactions. Dimethylaminoethyl methacrylate (DMAM) and poly(ethylene glycol)-dimethacrylate (PEGDM) were copolymerized to yield hydrogels, and then acrylic acid (AA) monomer were adsorbed in the hydrogels followed by polymerization of AA to produce semi-IPNs. The swelling behavior of semi-IPNs depends largely on pH of medium, showing that the degree of swelling of the semi-IPNs exhibits a minimum at pH 6.0. It is observed that the elastic modulus of semi-IPNs is closely related to its swelling behavior.

Keywords

References

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