Hydrogels prepared by crosslinking copolymerization of N-allyl maleamic acid with acrylamide and acrylic acid


Bicak N., Senkal B. F. , GAZI M.

DESIGNED MONOMERS AND POLYMERS, cilt.7, sa.3, ss.261-267, 2004 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 7 Konu: 3
  • Basım Tarihi: 2004
  • Doi Numarası: 10.1163/156855504774076271
  • Dergi Adı: DESIGNED MONOMERS AND POLYMERS
  • Sayfa Sayıları: ss.261-267

Özet

Copolymerization of N-allyl maleamic acid (AMA) with acrylamide and acrylic acid results in rapid crosslinking in water. Although AMA is slightly soluble in water, it forms clear solutions in 10% of aqueous acrylamide and 20% acrylic acid solutions. By radical initiation with potassium persulfate at 65degreesC or redox initiation at 0degreesC, these solutions undergo gelation in less than 10 min. The crosslinking efficiency of AMA was estimated based on equilibrium swellings of its acrylamide copolymer gels either by the Flory-Rehner theory or by correlation with swelling-crosslinking density plots of acrylamide-methylene bis-acrylamide (BIS) copolymer gels. These results showed that efficiency of AMA in crosslinking copolymerization with acrylamide at 0degreesC is less than 10%. On the other hand, its efficiency rises up to 40-60% and levels off at 65degreesC. Overall results indicate that AMA having maleate and allylic double bonds is an efficient crosslinker for preparing polyacrylamide and polyacrylic acid gels.