Preserving physical, mechanical, and electrical properties after UV irradiation is one of the essential functions of Room Temperature Vulcanized Silicone Rubber (RTVSIR) as an insulating coating. On high-voltage insulators exposed to flames brought on by lightning and sparks, flame retardant polymer coatings are essential. Utilizing flame retardant fillers is the typical way for enhancing the flame retardancy performance of polymeric materials. Current study investigates the effect of silica content (1, 3, and 5 wt.%) on various properties of RTV-SiO2 nanocomposite under accelerated weathering conditions. The relevant tests were performed according to the standards to study the mechanical properties such as hardness, maximum elongation, tensile strength, tear strength, density, and flame retardancy before and after aging. Results indicated that nano-silica presence in the silicon rubber polymer matrix could enhance its different properties as well as longevity. Hardness was raised by increasing the silica content and the rate of this enhancement changed even more after the ultraviolet (UV) irradiation. However, tear strength, tensile strength, and elongation at breakpoint showed the best result on the optimal value of silica (3 wt.%), and they were significantly reduced at higher percentages (5 wt.%). Water absorption percentage and flame retardancy also excessed with the increment of nano-silica in the composite. However, the optimal percentage of nano silica improves the quality of RTV while significantly reducing it at higher percentages.
A Deep Investigation Into Nano SiO Reinforced RTV for High Voltage Insulators Application
Rajabimashhadi Z.
;Alam M. M.;Esposito Corcione C.
2023-01-01
Abstract
Preserving physical, mechanical, and electrical properties after UV irradiation is one of the essential functions of Room Temperature Vulcanized Silicone Rubber (RTVSIR) as an insulating coating. On high-voltage insulators exposed to flames brought on by lightning and sparks, flame retardant polymer coatings are essential. Utilizing flame retardant fillers is the typical way for enhancing the flame retardancy performance of polymeric materials. Current study investigates the effect of silica content (1, 3, and 5 wt.%) on various properties of RTV-SiO2 nanocomposite under accelerated weathering conditions. The relevant tests were performed according to the standards to study the mechanical properties such as hardness, maximum elongation, tensile strength, tear strength, density, and flame retardancy before and after aging. Results indicated that nano-silica presence in the silicon rubber polymer matrix could enhance its different properties as well as longevity. Hardness was raised by increasing the silica content and the rate of this enhancement changed even more after the ultraviolet (UV) irradiation. However, tear strength, tensile strength, and elongation at breakpoint showed the best result on the optimal value of silica (3 wt.%), and they were significantly reduced at higher percentages (5 wt.%). Water absorption percentage and flame retardancy also excessed with the increment of nano-silica in the composite. However, the optimal percentage of nano silica improves the quality of RTV while significantly reducing it at higher percentages.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
