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A novel pH-responsive random copolymer of sodium 2-(acrylamido)-2-methylpropanesulfonate and sodium 12-methacrylamidododecanoate grafted on a polyolefin porous material was prepared by a plasma-initiated polymerization method, and the adsorption behaviors of bisphenol-A (BPA), which is a representative hydrophobic endocrine disrupter, were examined.The adsorption amount of BPA on the polymer depended on the pH of the BPA solution permeated though the porous support, and the optimum pH to increase the amount of BPA taken into the micelles was observed.