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Polymers Containing Highly Polarizable Conjugated Side Chains as High‐Performance All‐Organic Nanodielectric Materials
Author(s) -
Qiao Yali,
Islam Mohammed Sayful,
Han Kuo,
Leonhardt Eric,
Zhang Jiuyang,
Wang Qing,
Ploehn Harry J.,
Tang Chuanbing
Publication year - 2013
Publication title -
advanced functional materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 6.069
H-Index - 322
eISSN - 1616-3028
pISSN - 1616-301X
DOI - 10.1002/adfm.201300736
Subject(s) - materials science , polymer , conjugated system , side chain , amorphous solid , polymerization , terthiophene , oligomer , polarizability , polymer chemistry , dielectric , thermal stability , chemical engineering , organic chemistry , molecule , optoelectronics , composite material , chemistry , engineering
The discovery of nanodipolar π ‐conjugated oligomer‐containing polymers as high performance nanodielectric materials with high permittivity and low dielectric loss over a wide range of frequency (100 Hz–4 MHz) is reported. Terthiophene‐containing methacrylate polymers are synthesized by reversible addition fragmentation transfer (RAFT) polymerization. Both X‐ray and thermal studies indicate the formation of small crystalline domains of terthiophene side chains dispersed in amorphous matrix. The highly polarizable and fast‐responsive nanodipoles from the nanoscale crystalline domains (<2 nm) are believed to dictate the performance. These polymers uniquely satisfy nanodipole architectures conjectured two decades ago to guide the design of high performance nanodielectric materials. This unprecedented approach can be generalized to a variety of π‐conjugated oligomer‐containing polymers for the development of high energy density capacitor materials.