DEPENDENCE OF WATER SORPTION-DESORPTION CHARACTERISTICS OF N,N'-METHYLENE-BIS-ACRYLAMIDE AND TETRAETHYLENEGLYCOL DIACRYLATE-CROSS-LINKED POLYACRYLAMIDES ON CROSS-LINKING

Hydrophilic monomers such as acrylamide IAA) when crosslinked with hig hly hydrophilic flexible tetraethyleneglycol diacrylate (TEGDA) and N, N'-methylene-bis-acrylamide (NNMBA) of intermediate polarity and hydro philicity provides highly water swellable hydrogels. These water-swell able but water insoluble macromolecules possess a number of physicoche mical properties useful for applications in biomedical and other techn ological fields. This paper describes the swelling/deswelling deswelli ng characteristics and the ability for water retention of these polyme rs in different compositions. Water sorption in these crosslinked poly acrylamides is dependent on a number of variables of polymer synthesis .