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29. Preparation and Dielectric Properties of Sulfonated Poly( aryl ether ketone)/ Acidified Graphite Nanosheet Composites
作者:Wenlong Jiang, Yu Liu, Jinfeng Wang, Qitong Wang, Yunhe Zhang, Shaowei Guan
關鍵字:Sulfonated Poly( aryl ether ketone)
論文來源:期刊
具體來源:Journal of applied polymer science, 2014, 131(6)
發表時間:2014年
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.
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