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With the development of EHV and UHV transmission technology, more and more transmission lines are built across high altitude regions in China. The pollution flashover performances in high altitude regions are affected not only by the pollutants but also by the atmospheric parameters. To study the performance of insulators at high altitudes, six commonly used porcelain, glass and polymer insulators...
This paper investigates a relatively new photoresist MR-I 7010R for its use in thermal nanoimprint lithography. The primary aspects tested were the thickness of the photoresist post imprinting and uniformity of the resulting residual layer thickness (RLT). These aspects were determined with respect to the initial thickness of the photoresist, which was deposited via spin-on coating, and change in...
This paper focuses on the polymerization and property assessment of water-soluble AM-co-AMPS polymers for enhanced oil recovery. The AM-co-AMPS polymers are synthesized by acrylamide(AM) and 2-acrylamido-2-methyl-1-propanesulfonic acid(AMPS) in aqueous solution. The synthesis is initiated by (NH4)2S2O8 and NaHSO3 redox system. The effects of initiator concentration, monomers' concentration, AMPS/AM...
Temperature affects on Polymer Insulators has been of interest to Utility Engineers because the mechanical strength of the insulator is provided by a fiber glass rod. This paper covers the effects of temperature on cantilever strength of Polymer Horizontal Line Post insulators. It covers tests run by NEETRAC for Georgia Power Company on Transmission Line Horizontal Line Post insulators. There are...
When we keep an amorphous polymer at a temperature below its glass transition temperature Tg or when we vary the cooling rate of the polymer from its melting temperature to a temperature below Tg, it is not in a true thermodynamical equilibrium state and many of its properties change such as the free volume, the enthalpy and other properties. This behavior is called Physical ageing. In this paper,...
A water chemistry procedure is used to synthesize titanium dioxide nanoparticles which can later be blended with a polymer to form a nanodielectric. The synthesized nanoparticles are dispersed in two grades of polyvinyl acetal (commercially available under the trade names BX-L and KS-10, manufactured by SEKISUI Chemicals). Nanocomposite materials were prepared with 15 and 33 wt% titanium dioxide....
A moldable polymer/ferrite composite (MPFC), easily moldable into arbitrary volumetric shapes is presented. The composite material is produced at room temperature and does not require any postprocessing treatment. The utility of the MPFC is demonstrated in a meandrous coplanar waveguide line phase shifter tuned by an applied magnetic dc field. Due to its low cost and high flexibility, the proposed...
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