In this study, acrylonitrile-butadiene-styrene and polycarbonate substrates plastics were coated with aluminum by physical vapor deposition method in order to determine which one is a better choice for outdoor reflector technology. This investigation has been done by applying the coating on a reflector that is already been used in the lighting industry. Scraping test, caustic soda and caustic potash test, reflection efficiency performance test and surface roughness test methods were used to determine the selection. Coatings on acrylonitrile-butadiene-styrene and polycarbonate plastic materials were characterized by scanning electron microscopy and energy dispersive x-ray spectrometry. Although acrylonitrile-butadienestyrene plastic material is easier for injection molding and cheaper than polycarbonate material, the results showed that polycarbonate plastic material is more efficient than acrylonitrile-butadiene-styrene plastic material, especially in terms of surface roughness and reflection efficiency.
Sıvama parametrelerinin tahmin edilmesi Kesme parametrelerinin iş parçası cidar kalınlığına etkisi Sıvanan iş parçasında gerilme ve gerinme dağılımı
The thermal conductivity, electrical conductivity and mechanical properties such as tensile strength, elongation, modulus of elasticity, were experimentally investigated. Thermal and electrical conductivity measurements were performed up to filler concentration of 30 vol.%. The mechanical properties of high density polyethylene filled with up to 30 vol.% Cu particles were investigated. The tensile strength, elongation and toughness decreased with increasing Cu powder content. This was attributed to the introduction of discontinuities in the polymer structure in which modulus of elasticity increased with increasing the copper content.
The coating is used to provide protection or functional properties to the surfaces of the substrate. In this study, acrylonitrile–butadiene–styrene plastic was coated with copper/ nickel by using an acidic electrolysis deposition method and with aluminum using the physical vapor deposition method. It has been investigated to find out which of these coating methods can be used as an outdoor lighting reflector. Therefore, these two coating methods were compared using sodium carbonate test, scratch test, surface roughness and reflection efficiency tests. In addition, copper/nickel deposited and aluminum deposited on acrylonitrile– butadiene–styrene plastic surfaces were characterized by scanning electron microscopy and energy dispersive X-ray spectrometry. The surface roughness and reflection efficiency of acrylonitrile–butadiene– styrene plastic coated with aluminum applying the plasma vapor deposition method was more efficient than copper/ nickel coated acrylonitrile–butadiene–styrene obtained by applying a non-electric bath method. It has been determined that the samples with electroless copper/nickel coating have a better outdoor resistance than the aluminum coated samples. On the other hand, it was also determined that the surface roughness and reflection efficiency of the aluminum coated samples was better with the plasma vapor deposition method than that of the electroless copper and nickel coated samples. The results show that aluminum coating with the physical vapor deposition method on acrylonitrile–butadiene–styrene plastic is more suitable for reflector technology in terms of light efficiency.
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