title: Interactions of Anion-Exchange Resins with Polyacrylates in Atmosphere.
abstract: The interactions of polyacrylates (PAs with mean molecular weight of 4.5, 25, and 250 kDa; Na+,pa-) with anion exchange resins in the Br-form (AXRs; -R+,Br-) were studied under practical conditions by reaction stoichiometry and spectroscopy. The stoichiometric or an excess amount of PA(4.5 kDa) completely replaced Br- in the AXRs of the cross-linking degree of 2 or 8%, respectively, to give (-R+,pa-), due to enhancement in selectivity of carboxylate group by multiple interactions. In contrast, PA(250 kDa) exchanged Br-only on the surface of AXRs and did not penetrate into the resins; CO2was involved in the system to induce exchange with CO32-. Using the slightly acidic condition caused substantially no exchange by CO32-but induced coextraction of PA with proton as free Hpa. PA(4.5 kDa) once penetrating into the resin phase as (-R+,pa-) or free Hpa was reversibly eluted under the appropriate conditions.
authors.affiliation: Graduate School of Engineering, Nagoya Institute of Technology.
authors.forename: Hiroya
authors.initials: H
authors.lastname: Tauchi
authors.forename: Yasumoto
authors.initials: Y
authors.lastname: Sakai
authors.forename: Noriyuki
authors.initials: N
authors.lastname: Okawa
authors.forename: Hanifa
authors.initials: H
authors.lastname: Faozia
authors.forename: Genki
authors.initials: G
authors.lastname: Mizuguchi
authors.forename: Takashi
authors.initials: T
authors.lastname: Yasui
authors.forename: Kazutake
authors.initials: K
authors.lastname: Takada
authors.forename: Akio
authors.initials: A
authors.lastname: Yuchi