A simple and efficient nitrating agent to achieve N-n-butyl-N-(2-nitroxyethyl) nitramine (Bu-NENA) and theoretical study of its compatibility with polyglycidyl nitrate (PGN) and glycidyl azide polymer (GAP) - Bayat, Yadollah; Esmailmarandi, Fatemeh; Azizkhani, Vahid (Polymer Bulletin, 2025)