Fig. 1. Structure, properties and application scenario of epoxy resin

Fig. 2. Effect of radiation on crosslinking, main-chain scission and physical properties of polymers^[13-16]

Fig. 3. Variation of tensile strength^[13] and bending strength^[14] of epoxy resin with absorbed dose

Fig. 4. (a) Bending stress-strain curves at different absorbed doses^[18]; (b) tensile stress-strain curves at different absorbed doses^[18]; (c) fracture micromorphology of tensile samples before irradiation^[20]; (d) fracture micromorphology of tensile samples irradiated with absorbed dose of 270 kGy under air atmosphere^[20](color online)

Fig. 5. (a) Dynamic mechanical spectra at different absorbed doses^[18]; (b) dynamic mechanical spectra of pure epoxy resin and BN-doped composite epoxy resin^[15] (color online)

Fig. 6. (a) Thermogravimetric curves of pure epoxy resin before and after irradiation^[15]; (b) thermogravimetric curves of composite epoxy resin materials before and after irradiation^[15]; (c) dissociation energies of various chemical bonds in the crosslinked structure of epoxy resin from DFT calculation^[25] (color online)

Fig. 7. (a) Thermal conductivity of SiC-filled composite epoxy resin^[31]; (b) thermal conductivity of BN-filled composite epoxy resin^[15]; (c) microstructure characterization of composite epoxy before irradiation^[32]; (d) microstructure characterization of composite epoxy after irradiation^[32] (color online)

Fig. 8. Relative dielectric constant of epoxy resin varies with absorbed dose^[16]

Fig. 9. (a) Conductivities of epoxy resin vary with absorbed dose^[16]; (b) impedance changes of composite epoxy resin before and after neutron irradiation^[39]

Fig. 10. (a) FTIR spectra of epoxy resin at different absorbed doses^[42]; (b) free radical concentration changes with absorbed dose^[24]; (c) C1s XPS spectra of epoxy resin before irradiation^[24]; (d) C1s XPS spectra of epoxy resin after irradiation^[24]; (e) schematic diagram of structural changes of epoxy resin after irradiation^[14,24]