Novel epoxy matrix resins have been prepared with the tetraglycidyl meta鄄xylenediamine (TGMXDA)
and bisphenol F epoxy ( DGEBF) as the matrix and the aromatic diamines, 4,4忆鄄bis[(4鄄amino鄄2鄄trifluoromethyl)
phenoxy]biphenyl (6FBAB) and 3,3忆鄄diamino鄄diphenylsulfone (DDS) as the hardeners. The effects of the chemical
structures and formulations of epoxy resins and the diamine hardeners on the properties of the cured epoxy compounds
were systemically investigated. The results indicated that the TGMXDA-DGEBF/ DDS-6FBAB epoxy systems exhibi鄄
ted good toughness with the tensile strengths exceeded 101 MPa,impact strengths higher than 20 kJ/ m2,and elonga鄄
tions at break over 6. 0%. Meanwhile, the cures epoxy showed good thermal stability up to 330益in nitrogen.