Properties of Polyvinylidene Difluoride−Carbon Nanotube Blends

Levi, Nicole; Czerw, R.; Xing, Shuya; Iyer, and Preethi; Carroll, David

doi:10.1021/nl0494203

Cited by 310 publications

(222 citation statements)

References 22 publications

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“…Nanotubes favor the alpha crystalline form in polyamide 6 filled with MWCNTs, 135,[190][191][192][193] which is opposite that of nanoclays which favor the gamma form. 194,195 Nanotubes favor the beta phase of polyvinylidene fluoride for pristine tubes, 175,[196][197][198] fluorine-functionalized tubes, 199 and a coated nanotube which was coated with a styrene-chloromethyl styrene hyperbranched copolymer. 173 However, in one study, only when the films were drawn did beta phase crystallites form.…”

Section: Semicrystalline Polymersmentioning

confidence: 99%

Effects of carbon nanotubes on polymer physics

Grady

2012

J Polym Sci B Polym Phys

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A single carbon nanotube has many similarities with an individual polymer chain including the fact that the end-to-end length of both are often about the same and the diameter of the chain is about the same (for single-walled nanotubes) or only $10 to 20 times larger (for multiwalled nanotubes). The combination of the solid surface and the similarity of the two materials means that polymer physics are altered in manners not seen with any other type of commonly used filler. The purpose of this review is to update a chapter that appears in a recent tome by Grady (2011) and describe how polymer physics is altered in composites that contain carbon nanotubes. Subjects that will be discussed include chain configuration, glass transition, polymer diffusion, unit cells and crystalline superstructure (lamellae, spherulites and shishkebabs), and crystallization kinetics. V C 2012 Wiley Periodicals, Inc. J Polym Sci Part B: Polym Phys 50: 2012

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Section: Semicrystalline Polymersmentioning

confidence: 99%

Effects of carbon nanotubes on polymer physics

Grady

2012

J Polym Sci B Polym Phys

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“…The incorporation of ZnO nanorods would induce large interfacial areas in composites which may result in a higher degree of interfacial polarization. On the other hand, the polarization and dielectric properties of the PVDF based ferroelectric polymers originate from their crystalline domain and the β phase exhibits piezoelectric and pyroelectric properties [21][22][23][24][25] , so it is reasonable to deduce that the formation of β phase do contribute to the enhancement of dielectric constant. And the decrease rate of the dielectric constant here is not remarkable.…”

Section: Dielectric Properties Of P(vdf-hfp) and Its Nanocompositesmentioning

confidence: 99%

Crystal structure transformation and dielectric properties of polymer composites incorporating zinc oxide nanorods

Dang

et al. 2013

Macromol. Res.

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Abstract.Zinc oxide (ZnO) nanorods were synthesized using a modified wet chemical method. Poly(vinylidene fluoride-co-hexafluoropropylene), P(VDF-HFP), nanocomposites with different ZnO nanorods loadings were prepared via a solution blend route. Field emission scanning electron microscopic (FESEM), X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FT-IR) were used to investigate the structure and morphology of the nanocomposites. XRD and FT-IR data indicate that the incorporation of ZnO nanorods promote the crystalline structure transformation of P(VDF-HFP). As the content of ZnO nanorods increases, the β phase structure increases while the α phase decreases. In addition, the dielectric properties of the P(VDF-HFP) and its composites were systematically studied.

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“…Poly(vinylidene fluoride), PVDF, is known to exhibit good piezoelectric and pyroelectric properties [1][2][3][4][5]. This has attracted the attention of researchers for many years and a large number of experimental and theoretical studies on PVDF, including its crystal phases, have been made [6][7][8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Simulation of α- and β-PVDF melting mechanisms

Erdtman

Satyanarayana

Bolton

2012

Polymer

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Molecular dynamics (MD) simulations have been used to study the melting of α-and β-poly (vinylidene fluoride) (α-and β-PVDF). It is seen that melting at the ends of the polymer chains precedes melting of the bulk crystal structure. Melting of α-PVDF initially occurs via transitions between the two gauche dihedral angles (G ↔ G') followed by transitions between trans and gauche dihedral angles (T ↔ G/G'). Melting of β-PVDF initially occurs via T → G/G' transitions and via transitions of complete β-(TTTT) to α-(TGTG') quartet. The melting point of β-PVDF is higher than that of α-PVDF, and the simulated melting points of both phases depend on the length of the polymer chains used in the simulations. Since melting starts at the chain ends, it is important to include these in the simulations, and simulations of infinitely long chains yield melting points far larger than the experimental values (at least for periodic cells of the size used in this work), especially for β-PVDF. The simulated heats of fusion are in agreement with available experimental data.

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Properties of Polyvinylidene Difluoride−Carbon Nanotube Blends

Cited by 310 publications

References 22 publications

Effects of carbon nanotubes on polymer physics

Effects of carbon nanotubes on polymer physics

Crystal structure transformation and dielectric properties of polymer composites incorporating zinc oxide nanorods

Simulation of α- and β-PVDF melting mechanisms

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