Authors Kai Ke ; Pötschke, P. ; Jehnichen, D. ; Fischer, D. ; Voit, B.
Title Achieving b-phase poly(vinylidene fluoride) from melt cooling: effect of surface functionalized carbon nanotubes
Date 09.01.2014
Number 40763
Abstract 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 ß-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 ß-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 ß-phase, i.e. 4.7%. The analysis on the mechanism of the influence of surface functionalization of MWCNTs on the formation of ß-phase in PVDF shows that the combined effects of the dispersion of MWCNTs and the nanotube–polymer interactions account for the formation of the ß-phase in PVDF.
Publisher Polymer
Citation Polymer 55 (2014) 611-619
Tags poly(vinylidene fluoride) (pvdf) multi-walled carbon nanotubes (mwcnts) ß-phase mechanical-properties polyvinylidene difluoride piezoelectric properties electrical-conductivity interfacial interaction crystalline-structure nanocomposite films extensional

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