title: Preparation of poly(4-hydroxystyrene) based functional block copolymer through living radical polymerization and its nanocomposite with BaTiO3 for dielectric material.
abstract: Poly(4-hydroxystyrene) block copolymers containing maleic acid groups in one block were prepared through nitroxide mediated polymerization and their thin films with or without BaTiO3 nanoparticles were evaluated as a solution-processable dielectric materials. Poly(4-hydroxystyrene-co-maleic acid)-block-poly(4-hydroxystyrene) was successfully prepared through the hydrolysis of poly(4-acetoxystyrene-co-maleic anhydride)-block-poly(4-acetoxystyrene), as evidenced by GC, GPC, FT-IR and NMR. Through the incorporation of maleic acid group and BaTiO3 nanoparticles to poly(4-hydroxystyrene), higher dielectric constant was observed, suggesting that the dielectric constants of the composite films were strongly affected by the structural and compositional characteristics of polymers and nanocomposites.
authors.affiliation: Department of Nano Science and Technology, Sejong University, Seoul 143-747, Korea.
authors.forename: Yeon Ju
authors.initials: YJ
authors.lastname: Lee
authors.forename: Yunseok
authors.initials: Y
authors.lastname: Jang
authors.forename: Kilwon
authors.initials: K
authors.lastname: Cho
authors.forename: Seungmoon
authors.initials: S
authors.lastname: Pyo
authors.forename: Do-Hoon
authors.initials: DH
authors.lastname: Hwang
authors.forename: Sung Chul
authors.initials: SC
authors.lastname: Hong