Synthesis and characterization of polyacrylamide-graft-poly(ethylene oxid-copropyleneoxide)

Sicco de Vos, Martin Möller, K. Visscher, P.F. Mijnlieff

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The synthesis and first experiments on the rheological behaviour of poly(acrylamide) (PAAm) grafted with poly(ethylene oxide-co-propylene oxide) are presented. Well-defined, water-soluble graft copolymers were prepared in high yields by grafting poly(oxyalkylene) monoamines onto partly hydrolysed PAAm. Reversible gelation of aqueous graft copolymer solutions (c > c* = 1/[n]) was observed in 0.5 M K2CO3 at elevated temperatures, accompanied by viscosity changes of almost three orders of magnitude between 80 and 85°C at low shear rates. The observed phenomena are explained in terms of the formation of secondary bonds or association between the grafts.
Original languageEnglish
Pages (from-to)2644-2650
Issue number12
Publication statusPublished - 1994


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