title: A nonaqueous potentiometric titration study of the dissociation of t-butyl methacrylate-methacrylic acid copolymers.
abstract: The dissociation of t-butyl methacrylate-methacrylic acid copolymers in dimethyl sulfoxide was analyzed by a nonaqueous potentiometric titration technique. The negative logarithm of the dissociation constant of the monomer unit of a methacrylic acid (MAA) monotonously increased with the increasing degree of dissociation corresponding to the titrant/MAA amount ratio, and was highly influenced by the copolymerization ratio. The results are discussed in terms of the suppression of the dissociation of MAA by a neighboring charged methacrylate anion unit.
authors.affiliation: Department of Chemistry, University of Tsukuba, 1-1-1 Tennoudai, Tsukuba 305-8571, Japan. nakatani@chem.tsukuba.ac.jp
authors.forename: Kiyoharu
authors.initials: K
authors.lastname: Nakatani
authors.forename: Jun
authors.initials: J
authors.lastname: Yamashita
authors.forename: Tomomi
authors.initials: T
authors.lastname: Sekine
authors.forename: Minoru
authors.initials: M
authors.lastname: Toriumi
authors.forename: Toshiro
authors.initials: T
authors.lastname: Itani