期刊
JOURNAL OF POLYMER RESEARCH
卷 20, 期 9, 页码 -出版社
SPRINGER
DOI: 10.1007/s10965-013-0236-z
关键词
PVDF; PMMA; MWNTs-OH; Nanocomposite; Polar phase; Dielectric property
资金
- Innovation Program of Shanghai Municipal Education Commission
- Innovation Key Program of Shanghai Municipal Education Commission [13ZZ140]
- National Natural Science Foundation of China [51207085]
- Natural Science Foundation of Shanghai [11ZR1413500]
- National student innovative experiment plan [012-sj-cxjh-010]
Poly(vinylidene fluoride) (PVDF)/poly(methyl methacrylate) (PMMA)/hydroxylated multiwall carbon nanotubes (MWNTs-OH) nanocomposites are prepared via solution blending and hot-press processing. The structure, morphology, crystallization behavior and dielectric properties of nanocomposites are studied. The results show that the crystallization of PVDF is affected by PMMA and MWNTs-OH. With the introduction of PMMA and increment of MWNTs-OH, the content of polar phase in PVDF increases. The dependence of the dielectric properties of the nanocomposites on both volume fraction of the fillers and frequency is investigated. The percolation threshold of the nanocomposite, 2.79 vol.% (volume fraction), is much lower than that of the common two phase particle-polymer composite. A dielectric constant of over 300 is observed at 10(2) Hz with 3.12 vol.% of MWNTs-OH, which is near the percolation threshold. Large enhancements of the conductivity and loss tangent are also observed near the percolation threshold. The results can be explained by the percolation theory and nanocapacitor model theory.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据