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Polymers
Volume 18
Issue 4
10.3390/polym18040448
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Article

Effect of Radiation up to 30 MGy on Mechanical and Dielectric Properties of Polymers for Superconducting and Resistive Magnets

by
Christian Scheuerlein
*,
Filip Louka
,
Pavan Chaganti
and
Roland Piccin
European Organization for Nuclear Research (CERN), Esplanade des Particules 1, 1211 Geneva, Switzerland
*
Author to whom correspondence should be addressed.
Polymers 2026, 18(4), 448; https://doi.org/10.3390/polym18040448
Submission received: 21 January 2026 / Revised: 1 February 2026 / Accepted: 6 February 2026 / Published: 10 February 2026
(This article belongs to the Section Polymer Analysis and Characterization)
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Abstract

The effect of ionising irradiation up to 30 MGy on the mechanical and dielectric properties of different polymers for potential use in particle accelerators and detectors was compared in this study. The materials studied include the high-performance polymers PEEK, PPS and PEI; pure anhydride- and amine-based epoxy resin systems for coil impregnation and adhesive bonding; glass fibre epoxy composites; and FDM, SLA and SLS 3D-printed materials and polyurethanes. Gamma irradiation was applied in ambient air at an approximate dose rate of 2 kGy/h. Dose-dependent radiation damage was monitored by three-point bending tests, Shore A hardness, tensile stress–strain measurements and breakdown voltage tests in liquid nitrogen. Radiation hardness was rated according to two criteria: the dose at which the initial mechanical strength is halved and the dose at which the mechanical strength is reduced below a certain threshold value. The degradation of the breakdown voltage was preceded by the degradation of mechanical properties.
Keywords: irradiation; epoxy resin; 3D printing; PEEK; PPS; PEI; polyurethane; casting; elastomer; superconducting magnet; accelerator; fusion; break down voltage; mechanical strength; shear strength; three-point bending; cross-linking; chain scission irradiation; epoxy resin; 3D printing; PEEK; PPS; PEI; polyurethane; casting; elastomer; superconducting magnet; accelerator; fusion; break down voltage; mechanical strength; shear strength; three-point bending; cross-linking; chain scission

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MDPI and ACS Style

Scheuerlein, C.; Louka, F.; Chaganti, P.; Piccin, R. Effect of Radiation up to 30 MGy on Mechanical and Dielectric Properties of Polymers for Superconducting and Resistive Magnets. Polymers 2026, 18, 448. https://doi.org/10.3390/polym18040448

AMA Style

Scheuerlein C, Louka F, Chaganti P, Piccin R. Effect of Radiation up to 30 MGy on Mechanical and Dielectric Properties of Polymers for Superconducting and Resistive Magnets. Polymers. 2026; 18(4):448. https://doi.org/10.3390/polym18040448

Chicago/Turabian Style

Scheuerlein, Christian, Filip Louka, Pavan Chaganti, and Roland Piccin. 2026. "Effect of Radiation up to 30 MGy on Mechanical and Dielectric Properties of Polymers for Superconducting and Resistive Magnets" Polymers 18, no. 4: 448. https://doi.org/10.3390/polym18040448

APA Style

Scheuerlein, C., Louka, F., Chaganti, P., & Piccin, R. (2026). Effect of Radiation up to 30 MGy on Mechanical and Dielectric Properties of Polymers for Superconducting and Resistive Magnets. Polymers, 18(4), 448. https://doi.org/10.3390/polym18040448

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