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Core–Shell Structured Polystyrene/BaTiO 3 Hybrid Nanodielectrics Prepared by In Situ RAFT Polymerization: A Route to High Dielectric Constant and Low Loss Materials with Weak Frequency Dependence
Author(s) -
Yang Ke,
Huang Xingyi,
Xie Liyuan,
Wu Chao,
Jiang Pingkai,
Tanaka Toshikatsu
Publication year - 2012
Publication title -
macromolecular rapid communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.348
H-Index - 154
eISSN - 1521-3927
pISSN - 1022-1336
DOI - 10.1002/marc.201200361
Subject(s) - dielectric , materials science , polystyrene , nanocomposite , dielectric loss , raft , in situ polymerization , polymerization , composite material , high κ dielectric , polymer chemistry , polymer , optoelectronics
A novel route to prepare core–shell structured nanocomposites with excellent dielectric performance is reported. This approach involves the grafting of polystyrene (PS) from the surface of BaTiO 3 by an in situ RAFT polymerization. The core–shell structured PS/BaTiO 3 nanocomposites not only show significantly increased dielectric constant and very low dielectric loss, but also have a weak frequency dependence of dielectric properties over a wide range of frequencies. In addition, the dielectric constant of the nanocomposites can also be easily tuned by varying the thickness of the PS shell. Our method is very promising for preparing high‐performance nanocomposites used in energy‐storage devices.