Abstract: Hydrogel was prepared by using polyoxyethylene lauryl ether (MOA,degree of polymerization are 3, 4, 7, 9), acrylic acid and n-butyl acrylate. The representation of the monomer and the resultant was given by FTIR. Besides, the hydrogel’s swelling ratio and thermosensitivity at room temperature (25 ℃) were also tested.

Key words: polyoxyethylene lauryl ether; hydrogel; FTIR; thermosensitivity