Polyethylene

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Note, however, that the C−H bond angles are not 90° as this diagram would indicate, but are approximately 110°, since each carbon atom is tetrahedral. (Wikipedia.org)






Conferences related to Polyethylene

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2020 IEEE 16th International Workshop on Advanced Motion Control (AMC)

AMC2020 is the 16th in a series of biennial international workshops on Advanced Motion Control which aims to bring together researchers from both academia and industry and to promote omnipresent motion control technologies and applications.


2020 IEEE/PES Transmission and Distribution Conference and Exposition (T&D)

Bi-Annual IEEE PES T&D conference. Largest T&D conference in North America.


2019 44th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz)

Science, technology and applications spanning the millimeter-waves, terahertz and infrared spectral regions


2019 IEEE 46th Photovoltaic Specialists Conference (PVSC)

Photovoltaic materials, devices, systems and related science and technology


2019 IEEE 69th Electronic Components and Technology Conference (ECTC)

premier components, packaging and technology conference


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Periodicals related to Polyethylene

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Antennas and Propagation, IEEE Transactions on

Experimental and theoretical advances in antennas including design and development, and in the propagation of electromagnetic waves including scattering, diffraction and interaction with continuous media; and applications pertinent to antennas and propagation, such as remote sensing, applied optics, and millimeter and submillimeter wave techniques.


Applied Superconductivity, IEEE Transactions on

Contains articles on the applications and other relevant technology. Electronic applications include analog and digital circuits employing thin films and active devices such as Josephson junctions. Power applications include magnet design as well asmotors, generators, and power transmission


Biomedical Engineering, IEEE Transactions on

Broad coverage of concepts and methods of the physical and engineering sciences applied in biology and medicine, ranging from formalized mathematical theory through experimental science and technological development to practical clinical applications.


Communications, IEEE Transactions on

Telephone, telegraphy, facsimile, and point-to-point television, by electromagnetic propagation, including radio; wire; aerial, underground, coaxial, and submarine cables; waveguides, communication satellites, and lasers; in marine, aeronautical, space and fixed station services; repeaters, radio relaying, signal storage, and regeneration; telecommunication error detection and correction; multiplexing and carrier techniques; communication switching systems; data communications; and communication theory. In addition to the above, ...


Device and Materials Reliability, IEEE Transactions on

Provides leading edge information that is critical to the creation of reliable electronic devices and materials, and a focus for interdisciplinary communication in the state of the art of reliability of electronic devices, and the materials used in their manufacture. It focuses on the reliability of electronic, optical, and magnetic devices, and microsystems; the materials and processes used in the ...


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Xplore Articles related to Polyethylene

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The effects of moisture on performance of polymeric cables

IEE Two Day Colloquium on Supertension, 1995

Water, or the excess of it, has always been implicated in poor performance, sometimes to the point of failure, of highly stressed insulation systems as used in cables. This is no less true in the families of extruded polymeric dielectric systems with current and projected use at voltages up to 500 kV. Here, the authors examine the effects of moisture ...


Overall design of supertension cables

IEE Two Day Colloquium on Supertension, 1995

The author describes how, during the design of supertension (66 kV to 500 kV) polymeric power cables, it is necessary to not only consider the electrical performance of the dielectric but also the correct choice of overall cable design to perform a variety of functions. The polymeric insulation must be protected from the surrounding environment by a radial metallic moisture ...


Fabrication of a two-dimensional photonic crystal using deep vertical etching of polyethylene terephtalate plastic

2005 Joint 30th International Conference on Infrared and Millimeter Waves and 13th International Conference on Terahertz Electronics, 2005

Using a novel technique for deep vertical etching of PET, a two-dimensional photonic crystal slab is fabricated. Vertical confinement is obtained using both specular and total reflection. The technique can achieve dimensions required for realization of two-dimensional photonic crystals at infrared and terahertz frequencies.


Rheological, thermal and electrical properties of poly(ethylene oxide) / boehmite nanocomposites

2009 IEEE Conference on Electrical Insulation and Dielectric Phenomena, 2009

Polyethylene oxide (PEO) is a water-soluble polymer that is widely used as a model system to examine fundamental processes. This paper details an investigation into the physical, thermal and electrical properties of PEO- based nanocomposites containing a highly hydrophilic boehmite nanofiller. The boehmite was dispersed into the PEO in solution in distilled water, by using controlled shear conditions, and the ...


Dielectric properties of biodegradable polylactic acid and starch ester

Proceedings of the 2004 IEEE International Conference on Solid Dielectrics, 2004. ICSD 2004., 2004

In order to examine the applicability of biodegradable polymers to the fields of electrical insulation, several dielectric properties of two typical biodegradable polymers, polylactic acid (PLA) and starch ester (SE), are examined. A fairly larger amount of space charge is accumulated in both polymers in comparison to low-density polyethylene (LDPE). This seems partly due to the presence of hydroxyl and ...


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Educational Resources on Polyethylene

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IEEE.tv Videos

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IEEE-USA E-Books

  • The effects of moisture on performance of polymeric cables

    Water, or the excess of it, has always been implicated in poor performance, sometimes to the point of failure, of highly stressed insulation systems as used in cables. This is no less true in the families of extruded polymeric dielectric systems with current and projected use at voltages up to 500 kV. Here, the authors examine the effects of moisture on the performance of polymeric power cables by studying the following cable insulation systems: XLPE; EPR; MDPE/HDPE; and PVC.

  • Overall design of supertension cables

    The author describes how, during the design of supertension (66 kV to 500 kV) polymeric power cables, it is necessary to not only consider the electrical performance of the dielectric but also the correct choice of overall cable design to perform a variety of functions. The polymeric insulation must be protected from the surrounding environment by a radial metallic moisture barrier and suitable protection from the forces generated by thermal expansion, installation conditions or accidental damage. In service the core protection will be subjected to: (1) capacitive charging currents; (2) circulating currents; (3) transient fault currents; and (4) transient voltages which all must be designed for and adequately dissipated. The cable design is completed with a polymeric oversheath which can be modified to be abrasion resistant, termite resistant or have enhanced fire performance to suit the particular installation conditions. All of these influences must be considered in the overall design of a supertension polymeric cable.

  • Fabrication of a two-dimensional photonic crystal using deep vertical etching of polyethylene terephtalate plastic

    Using a novel technique for deep vertical etching of PET, a two-dimensional photonic crystal slab is fabricated. Vertical confinement is obtained using both specular and total reflection. The technique can achieve dimensions required for realization of two-dimensional photonic crystals at infrared and terahertz frequencies.

  • Rheological, thermal and electrical properties of poly(ethylene oxide) / boehmite nanocomposites

    Polyethylene oxide (PEO) is a water-soluble polymer that is widely used as a model system to examine fundamental processes. This paper details an investigation into the physical, thermal and electrical properties of PEO- based nanocomposites containing a highly hydrophilic boehmite nanofiller. The boehmite was dispersed into the PEO in solution in distilled water, by using controlled shear conditions, and the properties of the resulting materials were then studied. Dispersion was analysed during the solution rheology phase and the crystallisation and melting behaviour were examined using differential scanning calorimetry. The AC ramp electrical breakdown strength and dielectric response were also analysed.

  • Dielectric properties of biodegradable polylactic acid and starch ester

    In order to examine the applicability of biodegradable polymers to the fields of electrical insulation, several dielectric properties of two typical biodegradable polymers, polylactic acid (PLA) and starch ester (SE), are examined. A fairly larger amount of space charge is accumulated in both polymers in comparison to low-density polyethylene (LDPE). This seems partly due to the presence of hydroxyl and carbonyl groups in these polymers. Permittivity and conductivity are higher in SE than PLA that has the values close to those of LDPE. The dielectric breakdown strength is lower in SE and is higher in PLA than LDPE. As for the resistance to photodegradation by ultraviolet photons, SE is stronger than PLA, although the two are much inferior to LDPE.

  • Structural dependence of the electrical conductivity of polyethylene terephthalate

    The electrical properties of polymeric materials depend not only on the chemical composition but also on the structural features associated with the type and degree of molecular order. In the fabrication of polymeric films and fibers various thermal and mechanical treatments alter the physical structure, resulting in profound effects on the electrical properties such as conductivity, specific inductive capacity and dielectric loss. Herein are discussed the relationship between structural variables and the direct current conductance in films from polyethylene terephthalate. This polyester, which is the condensation polymer from ethylene glycol and terephthalic acid, is known commercially in the oriented, crystalline film form as "Mylar"* polyester film.

  • Space charge behavior in LDPE and its blend polymers

    The space charge behaviors in LDPE and blend polymers of LDPE and random copolymer of ethylene and propylene (EP) were investigated with the pulsed electro-acoustic (PEA) method. A positive DC voltage was applied to the semiconductive electrode of Al/specimen/semiconductive layer. The blend specimen of 90 wt.% LDPE and 10 wt.% polypropylene copolymer (B10) showed more space charge than pure LDPE (PE) under a DC field of 50 MV m/sup -1/ at both 30 and 60/spl deg/C. Positive space charge moved more slowly in B10 than in PE at 30/spl deg/C. DC current of B10 was less than that of PE at 30/spl deg/C, but higher at 60/spl deg/C. The decay characteristics of space charge after short-circuiting were also investigated. The decay processes for both PE and B10 had two time constants which suggest the existence of two kinds of carrier traps. The activation energy was estimated from the temperature dependence of decay time constant. The activation energy corresponding to trap depth increased by blending polypropylene copolymer with LDPE, suggesting the modification of traps by blending.

  • Supported lipid bilayers microarrays onto a surface and inside microfluidic channels

    We present simple soft lithographic methods for patterning supported lipid bilayer (SLB) membranes onto a surface and inside microfluidic channels. Micropatterns of polyethylene glycol (PEG)-based polymers were fabricated on glass substrates by microcontact printing or capillary molding. The patterned PEG surfaces have shown 97±0.5% reduction in lipid adsorption onto two dimensional surfaces and 95±1.2% reduction inside microfluidic channels in comparison to glass control. Atomic force microscopy measurements indicated that the deposition of lipid vesicles led to the formation of SLB membranes by vesicle fusion due to hydrophilic interactions with the exposed substrate. Furthermore, the functionality of the patterned SLBs was tested by measuring the binding interactions between biotin (ligand)-labeled lipid bilayer and streptavidin (receptor). SLB arrays were fabricated with spatial resolution down to ~500 nm on flat substrate and ~1 μm inside microfluidic channels, respectively.

  • The Ranchero explosive pulsed power system

    We are developing a high explosive pulsed power system concept that we call Ranchero. Ranchero systems consist of series-parallel combinations of simultaneously initiated coaxial magnetic flux compression generators, and are intended to operate in the range from 50 MA to a few hundred MA currents. One example of a Ranchero system is shown. The coaxial modules lend themselves to extracting the current output either from one end or along the generator midplane. In this paper we concentrate on the system that we will use for our first imploding liner tests, a single module with end output. The module is 1.4 m long and expands the armature by a factor of two to reach the 30 cm OD stator. Our first heavy liner implosion experiments will be conducted in the range of 40-50 MA currents. Electrical tests, to date, have employed high explosive (HE) charges 43 cm long. We have performed tests and related 1D MHD calculations at the 45-MA current level with small loads. From these results, we determine that we can deliver currents of approximately 50 MA to loads of 8 nH.

  • A mathematical model to study the influence of space charges in a needle-plane-arrangement in a polymer

    In polymeric insulating materials, tree-initiated breakdown is supported by space charge. A mathematical model is developed to study the influence of space charge on the field strength of a needle-plane arrangement. The model examines carrier injection at the metal-polymer contact. The movement of the charge carriers is dependent on field strength, temperature, and carrier mobility. The effects of electrons and holes were neglected. The effectiveness of the method is illustrated by examples of thermally stimulated currents.<<ETX>>



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