TY - GEN
T1 - Aging behavior of soft and hard epoxy resins in simulated nuclear-power-plant environments
AU - Ishii, Hiroyuki
AU - Hirai, Naoshi
AU - Ohki, Yoshimichi
N1 - Publisher Copyright:
© 2020 Institute of Electrical Engineers of Japan. All rights reserved.
PY - 2020/9/13
Y1 - 2020/9/13
N2 - Two kinds of bis-phenol epoxy resins, a soft one (SE) and a hard one (HE), were aged thermally with and without simultaneous irradiation of gamma rays. For each resin, glass transition temperature (Tg), thermal decomposition temperature, elongation at break, tensile strength, and flexural modulus were measured. The difference in Tg between SE and HE is significant, which exerts certain influences on their degradation properties. When aged, SE becomes hard and it is crosslinked, regardless of whether the simultaneous irradiation was given or not. Finally, SE becomes brittle. In contrast, the mechanical properties of HE are scarcely affected by the two aging processes. However, HE finally becomes hard if aged thermally, while it is decomposed by the irradiation.
AB - Two kinds of bis-phenol epoxy resins, a soft one (SE) and a hard one (HE), were aged thermally with and without simultaneous irradiation of gamma rays. For each resin, glass transition temperature (Tg), thermal decomposition temperature, elongation at break, tensile strength, and flexural modulus were measured. The difference in Tg between SE and HE is significant, which exerts certain influences on their degradation properties. When aged, SE becomes hard and it is crosslinked, regardless of whether the simultaneous irradiation was given or not. Finally, SE becomes brittle. In contrast, the mechanical properties of HE are scarcely affected by the two aging processes. However, HE finally becomes hard if aged thermally, while it is decomposed by the irradiation.
KW - Degradation
KW - Epoxy resin
KW - Glass transition temperature
KW - Nuclear power plant
KW - Thermal aging
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M3 - Conference contribution
AN - SCOPUS:85099305902
T3 - Proceedings of the International Symposium on Electrical Insulating Materials
SP - 587
EP - 590
BT - Proceedings of 2020 International Symposium on Electrical Insulating Materials, ISEIM 2020
PB - Institute of Electrical Engineers of Japan
T2 - 2020 International Symposium on Electrical Insulating Materials, ISEIM 2020
Y2 - 13 September 2020 through 17 September 2020
ER -