R&D on glass fiber reinforced epoxy resin composites for superconducting Tokamak

Abstract

The glass fiber reinforced epoxy resin composites play an important role in superconducting Tokamak, which are used to insulate the metal components, such as superconducting winding, cooling pipes, metal electrodes and so on. For the components made of metal and glass fiber reinforced epoxy resin composites, thermal shrinkage leads to non-ignorable thermal stress, therefore, much attention should be paid on the thermal shrinkage rate of glass fiber reinforced epoxy resin composites. The structural design of glass fiber reinforced epoxy resin composites should aim at reducing thermal stress. In this paper, the density, glass fiber content and thermal shrinkage rate of five insulation tubes were tested. The testing results will be applied in structural design and mechanical analysis of isolators for superconducting Tokamak.

R&D of 19 kV class splicing device to connect high-voltage instrumentation wires and cable

“…Relative permittivity Dielectric strength [kV/mm] G10 4.5 [1] 16 [3] GFRP 5.5 [2] 15.4 [3] Epoxy resin 3 [2] 19.7 [3] Alumina 9.6 [1] 13-14 [3] Vacuum 1 [1] -Talcum 4.7 [3] 25 [3] Polyimide 3.4 [4] 154 [4] [ If there are voids on the interface between metal structural parts and insulating structural parts, the analysis results indicate the peak electrical eld strength is 20.4 kV/mm, which can lead to partial discharge and breakdown. Therefore, it is necessary to reduce the void content in glass ber reinforced epoxy resin composite by using manufacturing process under vacuum, and the void content can be controlled under 1% [11].…”

Research on Thermal Aging Properties of Modified E-51 Epoxy Resin for Power-on Warning Helmet

“…Generally, lling materials such as nanometer particles and ber can be used to modify epoxy resin. For example, one-dimensional organic nanometer particles [11], nanometer-sized alumina particles and glass ber were used to reinforce epoxy resin [12]. To reveal the thermal aging properties of E-51 epoxy resin modi ed with polymers made from polyester, polyurethane and polyether, the micro structure, infrared spectrum properties, tensile mechanical properties and electrical properties of cured system will be investigated.…”

Research on Thermal Aging Properties of Modified E-51 Epoxy Resin for Cryogenic Application

“…To improve the performance of cured epoxy resin system, various lling materials, such as nanometer particles and ber, can be used to modify epoxy resin. For example, organic nanometer particles [11], alumina particles, and glass ber have been used to reinforce epoxy resin [12]. To investigate the thermal aging properties of E-51 epoxy resin modi ed with polyester, polyurethane, and polyether polymers, the micro-structure, infrared spectrum properties, and tensile mechanical properties of the cured system will be examined.…”