Results 201 to 210 of about 805,268 (254)
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Conformational properties of poly(vinylidene bromide) and poly(vinylidene fluoride)
Macromolecules, 1990Calcul par la methode de mecanique de Boyd des proprietes conformationnelles d'hexahalogeno-2,2,4,4,6,6 heptane, composes modeles du PVDF et du PVDB. Les energies conformationnelles totales sont utilisees pour calculer un ensemble d'energies d'interactions intramoleculaires qui, a l'aide du modele RIS permettent d'evaluer les rapports caracteristiques ...
Luis Carballeira +2 more
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Journal of Polymer Science: Polymer Physics Edition, 1975
AbstractThe piezoelectricity of PVDF thermoelect rets formed with vacuum‐coated aluminum electrodes has been investigated in detail. The piezoelectricity depends on the β‐form crystal structure of PVDF homopolymer and copolymers. However, the piezoelectricity is not attributed to the stress dependence of the spontaneous polarization of β‐form crystals,
Naohiro Murayama +3 more
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AbstractThe piezoelectricity of PVDF thermoelect rets formed with vacuum‐coated aluminum electrodes has been investigated in detail. The piezoelectricity depends on the β‐form crystal structure of PVDF homopolymer and copolymers. However, the piezoelectricity is not attributed to the stress dependence of the spontaneous polarization of β‐form crystals,
Naohiro Murayama +3 more
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Properties of poly(vinylidene fluoride)
Polymer Engineering & Science, 1971AbstractThe properties of fluorocarbon plastics have made them desirable for numerous new applications. Poly(vinylidene fluoride) (PVF2) can be easily extruded into films or fibers or injection molded into a variety of shapes. It was found that crystallinity, molecular weight distribution and polymer structure are important in establishing resin ...
J. P. Stallings, S. G. Howell
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Journal of Polymer Science Part B: Polymer Physics, 1993
AbstractA combined optical and electron microscopical study has been carried out of the crystallization habits of poly(vinylidene fluoride) (PVF2) when it is crystallized from blends with noncrystallizable poly(ethyl acrylate) (PEA). The PVF2/PEA weight ratios were 0.5/99.5,5/95, and 15/85.
Robert M. Briber, F. Khoury
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AbstractA combined optical and electron microscopical study has been carried out of the crystallization habits of poly(vinylidene fluoride) (PVF2) when it is crystallized from blends with noncrystallizable poly(ethyl acrylate) (PEA). The PVF2/PEA weight ratios were 0.5/99.5,5/95, and 15/85.
Robert M. Briber, F. Khoury
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1982
This chapter presents an extensive review of the important ferroelectric polymer, poly(vinylidene fluoride). Covered topics include: polymerization, molecular structure, and defects; dilute-solution properties; crystalline structure of the various polymorphic phases, crystallization, and morphology; polymorphic transitions induced through a variety of ...
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This chapter presents an extensive review of the important ferroelectric polymer, poly(vinylidene fluoride). Covered topics include: polymerization, molecular structure, and defects; dilute-solution properties; crystalline structure of the various polymorphic phases, crystallization, and morphology; polymorphic transitions induced through a variety of ...
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The Journal of Physical Chemistry B, 2006
In situ Ag nanoparticles are produced on reduction of Ag+ with N,N-dimethylformamide in the presence of poly(vinylidene fluoride) (PVF2). The plasmon band transition is monitored with time in the reaction mixture for three sets of experiments by UV-vis spectroscopy. The plasmon band absorbance increases sigmoidally with log(time).
Swarup, Manna +2 more
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In situ Ag nanoparticles are produced on reduction of Ag+ with N,N-dimethylformamide in the presence of poly(vinylidene fluoride) (PVF2). The plasmon band transition is monitored with time in the reaction mixture for three sets of experiments by UV-vis spectroscopy. The plasmon band absorbance increases sigmoidally with log(time).
Swarup, Manna +2 more
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Degradation of Poly[vinyl Fluoride] and Poly[vinylidene Fluoride]
Journal of Macromolecular Science, Part C, 1985(1985). Degradation of Poly[vinyl Fluoride] and Poly[vinylidene Fluoride] Journal of Macromolecular Science, Part C: Vol. 25, No. 2, pp. 227-275.
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Minimization of protein adsorption on poly(vinylidene fluoride)
Biomolecular Engineering, 2002Surfaces covered with polyethylene glycol (PEG) have been shown to be biocompatible because PEG yields nonimmunogenicity, nonantigenicity and protein rejection. To produce a biocompatible surface coating, we have developed a method for grafting PEG onto modified poly(vinylidene fluoride) (PVDF) films.
Ademovic, Z. +4 more
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Journal of Macromolecular Science, Part B, 1970
Abstract A detailed study of high-pressure-crystallized poly(vinylidene fluoride) has indicated that a mixture of low-melting phase II and high-melting phase I is present, rather than a new crystalline phase (phase III) as originally suggested. The relative amounts of phase I and phase II resulting from crystallization under pressure are a function of ...
W. W. Doll, J. B. Lando
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Abstract A detailed study of high-pressure-crystallized poly(vinylidene fluoride) has indicated that a mixture of low-melting phase II and high-melting phase I is present, rather than a new crystalline phase (phase III) as originally suggested. The relative amounts of phase I and phase II resulting from crystallization under pressure are a function of ...
W. W. Doll, J. B. Lando
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Journal of Polymer Science: Polymer Physics Edition, 1976
AbstractPersistent polarization in poly(vinylidene fluoride) thermoelectrets prepared under high electric field has been studied by measurements of depolarization and pyroelectricity. Various polarizations are examined in detail; the polarizations related to a characteristic molecular motion near 60°C and the polarizing temperature are not responsible ...
Naohiro Murayama, Hideyuki Hashizume
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AbstractPersistent polarization in poly(vinylidene fluoride) thermoelectrets prepared under high electric field has been studied by measurements of depolarization and pyroelectricity. Various polarizations are examined in detail; the polarizations related to a characteristic molecular motion near 60°C and the polarizing temperature are not responsible ...
Naohiro Murayama, Hideyuki Hashizume
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