Achieving 尾-phase poly(vinylidene fluoride) from melt cooling: Effect of surface functionalized carbon nanotubes

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• 作者：Kai Ke ; Petra P枚tschke ; Dieter Jehnichen ; Dieter Fischer ; Brigitte Voit
• 关键词：Poly(vinylidene fluoride) (PVDF) ; Multi-walled carbon nanotubes (MWCNTs) ; 尾-phase
• 刊名：Polymer
• 出版年：30 January, 2014
• 年：2014
• 卷：55
• 期：2
• 页码：611-619
• 全文大小：2563 K

文摘

Poly(vinylidene fluoride) (PVDF) based nanocomposites with different surface-functionalized multi-walled carbon nanotubes (MWCNTs) were prepared by melt mixing in a small scale compounder. With the incorporation of commercial functionalized MWCNTs, the 尾-phase in PVDF can be directly achieved from melt cooling, as verified by results of Fourier transform infrared spectrum and X-ray diffraction. Interestingly, nanocomposites with amino group functionalized MWCNTs showed the highest percentage of 尾-phase (17.4%) formation in PVDF, followed by those with hydroxyl groups (11.6%) and unmodified MWCNTs (9.4%). However, the nanocomposites containing MWCNTs with carboxyl groups which were thought to be able to well interact with the dipoles on PVDF chains have the lowest amount of 尾-phase, i.e. 4.7%. The analysis on the mechanism of the influence of surface functionalization of MWCNTs on the formation of 尾-phase in PVDF shows that the combined effects of the dispersion of MWCNTs and the nanotube-polymer interactions account for the formation of the 尾-phase in PVDF.