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Preparation and dielectric properties of sulfonated poly(aryl ether ketone)/acidified graphite nanosheet composites
Author(s) -
Jiang Wenlong,
Liu Yu,
Wang Jinfeng,
Wang Qitong,
Zhang Yunhe,
Guan Shaowei
Publication year - 2014
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.40028
Subject(s) - materials science , composite material , dielectric , ultimate tensile strength , percolation threshold , composite number , ether , graphite , peek , aryl , ketone , mass fraction , volume fraction , polymer chemistry , percolation (cognitive psychology) , alkyl , organic chemistry , electrical resistivity and conductivity , polymer , chemistry , optoelectronics , engineering , neuroscience , electrical engineering , biology
Percolative dielectric composites of sulfonated poly(aryl ether ketone) (SPAEK) and acidified graphite nanosheets (AGSs) were fabricated by a solution method. The dielectric constant of the as‐prepared composite with 4.01 vol % AGSs was found to be 330 at 1000 Hz; this was a significant increase compared to that of pure SPAEK. Through the calculation, a low percolation threshold of the AGS/SPAEK composite was confirmed at 3.18 vol % (0.0318 volume fraction) AGSs; this was attributed to the large surface area and high conductivity of the AGSs. Additionally, our percolative dielectric composites also exhibited good mechanical performances and good thermostability, with a tensile strength of 71.7 MPa, a tensile modulus of 1.91 GPa, a breaking elongation of 16.4%, and a mass loss temperature at 5% of 336°C. © 2013 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2014 , 131 , 40028.
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