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Sequential Polymer Precipitation of Core–Shell Microstructured Composites with Giant Permittivity
Author(s) -
Dai Tingyang,
Chen Kai,
Qing Xutang,
Lu Yun,
Zhu Jinsong,
Gao Feng
Publication year - 2010
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.200900711
Subject(s) - materials science , composite material , microstructure , dielectric , percolation threshold , permittivity , polycarbonate , precipitation , percolation (cognitive psychology) , polymer , core (optical fiber) , shell (structure) , composite number , electrical resistivity and conductivity , physics , optoelectronics , engineering , neuroscience , meteorology , biology , electrical engineering
Abstract Polymeric core–shell microstructures have been constructed through a new method, namely sequential precipitation, which is intrinsically a self‐assembly and phase separation process. High‐quality poly(vinyldene fluoride)–polycarbonate–lithium perchlorate composite films with spherical core–shell microstructures have been prepared and determined to consist of conducting cores and insulating shells. Because of the percolation effect, the resulting materials present a dielectric constant as high as 10 4 –10 7 at the threshold.