抽象的

Hydrogel interpenetrating polymer networks of poly(vinyl alcohol)/ acrylic acid using GA and TMPTA or BIS as cross linkers

R.K.Wanchoo, Amandeep Kaur, Hema Setia, Anupama Thakur

Hydrogels of Poly(vinyl alcohol) (PVA) and interpenetrating polymer networks of PVAandAcrylic acid (AA) were synthesized using Glutraldehyde and Trimethylol propane triacrylate (TMPTA) or N-N’ Methylenebisacrylamide (BIS) as crosslinking agent for PVAandAArespectively. The hydrogels and interpenetrating polymer networks (IPNs)were characterized by measuring their % swelling, equilibrium volume swelling ratio, number average molecular weight between cross-links, mesh size and compressive strength in buffer solutions of pH 7.4 and pH 3 at 37  1oC. The effect of initial PVA/AAweight ratio, crosslinking ratio and the type of crosslinker for AA(TMPTAor BIS) on the dynamic and equilibrium swelling behavior of the IPNs were investigated. The swelling capabilities of PVA/AAIPNs were found to be higher than PVA hydrogels and the percentage swelling increased with an increase in the AA content in the IPNs.