Preparation of poly(4-hydroxystyrene) based functional block copolymer through living radical polymerization and its nanocomposite with BaTiO3 for dielectric material.
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.
Lee
Yeon Ju
YJ
Department of Nano Science and Technology, Sejong University, Seoul 143-747, Korea.
Jang
Yunseok
Y
Cho
Kilwon
K
Pyo
Seungmoon
S
Hwang
Do-Hoon
DH
Hong
Sung Chul
SC