Hydrogels based on n-alkyl methacrylate esters (n-AMA)
acrylic acid and acrylamide cross-linked with 4
4′-di(methacryloylmino)azobenzene were preparared.Swelling behavior of the hydrogels was studied by immersion of slabs of samples in buffered solutions of pH values 2.2~7.4.The process of swelling follows Schott second-order diffusion kinetics.The factors influencing the swelling behavior of the gels include:the degree of cross-linking