Acrylamide polyurethane grafting

Flexible polyurethane foam pre-irradiated with ionizing radiation in the presence of air can be readily grafted with vinyl monomers. Relatively low radiation doses (3 to 10 megarads) are required to graft various polar vinyl monomers. Grafting of as little as 2% by weight of acrylamide, methacrylamide, or acrylic acid converts the normally hydro-phobic polyurethane foam into a water-wettable sjjonge. 

An alternative to the acrylamide-based composite hydrogel dressing is an acrylamide grafted to a polyurethane film to give a transparent, flexible gel with an equilibrium water content of approximately 50 /o. The hydrated gel has a low modulus of elasticity and a high water permeability that facilitates the adherence of the gel to the wound surface. The permeability... 

K. Fujimoto, H. Tadokoro, Y. Ueda, Y. Ikada, Polyurethane surface modification by graft polymerization of acrylamide for reduced protein adsorption and platelet adhesion. Biomaterials 14 (6) (1993) 442-448. 

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