3-benzoxazine(DB) resin was researched by means of differential scanning calorimetry(DSC)
and the properties of cured resin were investigated.The result shows that: there is a wide endo reaction peak from 220 ℃ to 271.7 ℃ for the DB resin and the top of the peak is at 235.5 ℃.The reaction energy of the DB resin is 72.6 kJ/mol and the reaction lever is 1.08.Reasonable cure technology is at 190 ℃/1h+200 ℃/2h
and post cure technology is at 220 ℃/2h.The flexural strength of the cure resin is 84.3 MPa
and the impact strength of the cure resin is 9.4 kJ/m2.
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