Development of a new epoxy resin for superconducting magnet impregnation

Author

Baldan, C.A. ; Shigue, C.Y. ; Filho, E.R.

Author_Institution

Dept. de Engenharia Eletrica, Univ. Estadual Paulista, Sao Paulo, Brazil

Volume

10

Issue

1

fYear

2000

fDate

3/1/2000 12:00:00 AM

Firstpage

1347

Lastpage

1349

Abstract

A novel epoxy resin system based on a low viscosity Bisphenol-A (DGEBA)/Bisphenol-F (DGEBF) blend has been investigated for use in tight-wound superconducting magnet impregnation. The principle is to decrease the Bisphenol-A resin system viscosity by adding the low viscosity Bisphenol-F resin. The rheological and mechanical properties of the blend system are compared to the pure Bisphenol-A resin and also to the Bisphenol-F resin both cured with acid anhydride. For the vacuum/pressure impregnation, both the pure Bisphenol-F resin system and DGEBA/DGEBF blend system can be applied without S-glass fabric between coil layers due to its higher rigidity at low temperature and good resistance to thermal shock. This resin system have been tested for impregnation of copper and NbTi wire wound coils whilst Bisphenol-A resin system have been used for testing Nb/sub 3/Sn coil impregnation where S-glass braid is present as wire insulation.

Keywords

epoxy insulation; mechanical properties; polymer blends; shear modulus; superconducting magnets; thermal shock; cured with acid anhydride; epoxy resin; low viscosity Bisphenol-A/Bisphenol-F blend; mechanical properties; rheological properties; superconducting magnet impregnation; tight-wound superconducting magnet impregnation; Coils; Epoxy resins; Insulation testing; Mechanical factors; Rheology; Superconducting magnets; System testing; Thermal resistance; Viscosity; Wire;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/77.828486

Filename

828486