Synthesis and Characterization of Polyitaconic Acid/Polyacrylic Acid Interpenetrating Polymer Network HydrogelWU Li-li(School of Materials Science and Engineering,Wuhan University of Technology,Wuhan 430070,China)In this paper,Polyitaconic acid/ Polyacrylic acid interpenetrating polymer network hydrogel was synthesized.From study of swelling ratios of the PIAc,PAAc and IPN hydrogels in different pH conditions,swelling ratio of the hydrogels increases as the pH rise was found,the hydrogels had pH-sensitive character,but the swelling property of IPN hydrogel was different of the swelling properties of the PIAc and PAAc hydrogels.polyitaconic acid;polyacrylic acid;IPN hydrogel;pH-sensitive