1. Department of Polymer Science and Engineering, Shanghai Key Laboratory
of Electrical Insulation and Thermal Aging, Shanghai Jiao Tong University, Shanghai 200240, People’s Republic of China
2. IPS Research Center, Waseda University, Kitakyushu, Fukuoka 808-0135, Japan
3. Shanghai Engineering Center for Material
Safety of Nuclear Power Equipment, Shanghai 200240, People’s Republic of China