Abstract
Poly(acrylamide-co-methyl methacrylate) (poly(AAm-co-MMA)) hydrogels with chemical cross-links have been prepared using two monomers (acrylamide and methyl methacrylate) and cross-linker (N,N′-methylene bis acrylamide) (NN′-MBA) in different stoichiometric ratios. The effects of monomer ratio and cross-linking agent concentration on the swelling behaviour of poly(AAm-co-MMA)hydrogels were investigated. Swelling parameters such as equilibrium degree of swelling and swelling ratio, and network parameters such as molecular mass between cross-links (M c) and cross-link density (q) were determined. Depending on the monomer concentration, the M c values of hydrogels were varied from 1452.00 to 10 602.16 g/mol and q values of hydrogels were varied from 6.09 × 102 to 0.75 × 102. Depending on the cross-linking agent concentration the M c values of hydrogels were varied from 1463.57 to 2143.94 g/mol and q values of hydrogels were varied from 5.63 × 102 to 3.99 × 102. The ability of this co-polymeric hydrogel for use in controlled release of model drugs such as benzoic acid (BA), salicylic acid (SA) and p-nitroaniline (P-NA) was also studied.
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