材料科学
结晶度
氟化物
电介质
低聚物
无定形固体
复合材料
薄膜
介电常数
极化(电化学)
介电强度
聚合物混合物
高分子化学
聚合物
有机化学
物理化学
化学
纳米技术
无机化学
光电子学
共聚物
作者
Mojtaba Rahimabady,Shuting Chen,Kui Yao,Francis E. H. Tay,Li Lü
摘要
Dense α-phase blend films of vinylidene fluoride (VDF) oligomer and poly(vinylidene fluoride) (PVDF) of various compositions were prepared from chemical solution deposition. The dielectric constant of the films was unexpectedly lower, and the mechanical strength was higher than either of the two components, leading to high electromechanical dielectric breakdown strength (>850 MV/m vs. 300∼500 MV/m for typical PVDF-based films). The properties were attributed to the unique blend structure with high crystallinity and densely packed rigid amorphous phase incorporating long and short chains. A maximum polarization of 162 mC/m2 and a large electric energy density up to 27.3 J/cm3 were obtained.
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