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Showing 1 to 20 of 42 for “"Poly (Vinylidene Fluoride)"”.
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CHARACTERIZATION OF ELECTROSPRAYED POLY(VINYLIDENE FLUORIDE)/CNT NANOCOMPOSITE
PVDF, Poly(vinylidene fluoride), is a polymer that has been studied for over four decades due to its good electromechanical properties, stability, and durability in various environments. Currently, PVDF is the only commercially available piezoelectric polymer. PVDF is a polymorph, which indicates …
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Flow History - Morphology - Property Interactions in Poly(vinylidene Fluoride)
… analysis of the melt flow history of poly(vinylidene fluoride), PvF$\sb2$, in an extensional flow, film-processing geometry as well as morphological characterization and property measurements of the melt extruded films are presented.
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Surface modification of electrospun poly(vinylidene fluoride) nanofibrous microfiltration membrane
… fibers through an electrically charged jet of polymer solution/melt. These electrospun fibers have been explored in various applications such as scaffolds for tissue engineering, drug delivery carrier, biosensor/chemosensor, reinforced nanocomposite and electronic and semi-conductive materials. …
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Deformation and Transformation Mechanisms of Polybutene and Poly(vinylidene Fluoride)
The deformation of thin films of polybutene (PB) and poly(vinylidene fluoride) (PVF$\sb2$) occurs by micronecking. Finite blocks are drawn off the edge of the microneck depending upon the orientation of the original crystalline lamellae comprising the spherulites with respect to the draw direction. …
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Manufacturing of Poly(vinylidene fluoride) and Evaluation of its Mechanical Properties
Poly(vinylidene fluoride) (PVDF) receives an increasing amount of attention because it exhibits the strongest piezoelectric response of any commercially available polymer. These piezoelectric properties have proved useful as actuators and sensors. Current manufacturing processes limit PVDF to thin …
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Temperature dependent structure and properties of crystalline poly(vinylidene fluoride) from molecular simulation
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 1996.
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The development of poly(vinylidene fluoride) piezoelectric sensors for measuring peel stresses in adhesive joints
… develop a more versatile measurement technique, poly(vinylidene fluoride) film was used to develop piezoelectric stress sensors. The sensitivities of the film to normal stresses in the three principal material directions of the orthotropic film were accurately measured using a charge amplifier …
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Development and characterization of a hydrogen peroxide sensor using catalase immobilized on a pyroelectric poly(vinylidene fluoride) film
… in a flow channel with a pyroelectric polymer film, poly(vinylidene fluoride) or PVDF. The sample is introduced into the flow channel using flow injection analysis technology. The heat from the reaction causes the pyroelectric material to produce an electrical potential proportional to …
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Study of the miscibility, morphology, crystallization, and melting behavior of blends of poly(3-hydroxybutyrate) and poly(vinylidene fluoride)
… thermal, optical, and spectroscopic studies on poly(vinylidene fluoride)/poly(3-hydroxybutyrate) (PVDF/PHB) blends prepared by melt and solution blending techniques. The blends exhibit - a single, composition dependent Tg. Dynamic crystallization studies indicate that PVDF crystallizes first in …
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Electrospinning as a Processing Method for Electroactive Polymers and Composites
… piezoelectric properties to the fibers of poly(vinylidene fluoride). Differential scanning calorimetry and infrared spectroscopy indicated a degree of control over crystalline phase in poly(vinylidene fluoride) fibers based on electrospinning conditions. An increase in dielectric constant …
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Influence of High Aspect Ratio Nanoparticle Filler Addition on Piezoelectric Nanocomposites
… low powered electronics. Recently, piezoelectric polymers have been utilized for PNG technology due to low toxicity, high flexibility, and facile solution processing which provide manufacturing opportunities such as screen printing. Throughout the last decade, countless projects have focused on …
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Understanding the role of kinetic parameters on the crystallization of miscible semicrystalline polymer blends
… studies on miscible semi crystalline blends of poly(pivalolactone)/ poly(vinylidene fluoride)(pPVLIPVF₂) and poly(pivalolactone)/poly(vinylidene fluoride <i>co</i>- tetrafluoroethylene)(95-5) (PPVL/P(VF2-TFE)(95-5)) prepared by solution blending. The spherulitic growth rates of the α-phase PPVL …
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Electric Field Assisted Hydrogen Evolution Using Metallic Molybdenum Disulfide Catalysts
… designed by combining MoS2 with electroactive poly(vinylidene fluoride-co-trifluoroethylene) copolymer in Chapter 4 to facilitate HER by localized dielectric polarization. Enhanced reaction kinetics were observed due to increased hydrogen accessibility and accelerated mass transport, as …
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A feasibility study of PVDF piezoelectric sensors to detect damage in adhesive joints
Poly(vinylidene fluoride) (PVDF) films can be easily etched into sensor devices. Since these sensors are relatively inexpensive, thin and light-weight, they can be attached to adhesively bonded joints permanently to measure bond integrity. The present study shows the different steps to design such …
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Applications of high resolution solid state carbon-13 NMR to the study of multicomponent polymer systems
… was applied to a number of multicomponent polymer systems. Specific problems which were addressed are: (1) the nature of domain structure and molecular motion of two thermoplastic elastomer systems, including a series of styrene isoprene-styrene linear triblock copolymers (SIS’s) of various …
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Caracterização do resíduo pós-industrial de PVDF visando potencial utilização via reciclagem primária
Poly(vinylidene fluoride) (PVDF) is a polymer widely used by the oil & gas industry due to its special features that make it suitable for this application, like imperviousness to liquid and gases, good compatibility with most chemicals and good stability in high pressure/temperature. As a recycling …
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The Synthesis and properties of functionalised polymers
… of this project was to synthesise fluorinated polymers that might act as hot material in a guest-host system for use in non-linear optical applications. These polymers would be expected to have the advantage over materials such as poly(vinylidene fluoride) which is known to be incompatible with …
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CONFINED LAYERED POLYMERIC SYSTEMS FOR PACKAGING ANDCAPACITOR APPLICATIONS
… of layers containing two or more alternating polymers. This dissertation focuses on the structure-property relationships in layered polymeric systems for applications including confined crystallization for high gas barrier applications and multilayer dielectric films for high energy density …
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