采用动态差示扫描量热(DSC)法,研究了用于CIRTM工艺的E-44/GA327(DDM改性芳胺)环氧体系和苯并噁嗪酚醛树脂的固化过程,以及升温速率对固化体系DSC曲线的影响,并采用最佳固化温度外推法确定了两种树脂的最佳共固化制度.结果表明,苯并噁嗪固化反应表观活化能Ea为70.35kJ/mol,表观指前因子A为1.27×107s-1,反应级数n为0.897; E-44/GA327体系固化反应表观活化能Ea为44.04kJ/mol,表现指前因子A为1.78×104 s-1,反应级数n为0.884.两种树脂的最佳共固化制度为140℃/240min+180℃/240min,按所确定的共注射树脂的固化工艺制备了浇铸体,苯并噁嗪和E-44/GA327的固化度分别达到了96.7％和98.3％,固化物力学性能良好,验证了固化工艺的合理性.%The dynamic scanning calorimetry(DSC) method was used to determine the reaction kinetic parameters of epoxy resin system of E-44/GA327 and phenolic resin of benzoxazine. Effect of rate of temperature increasing on the characteristics of DSC curves were investigated, and the curing procedure was determined. Results show that the calculated activation energies of benzoxazine and E-44/GA327 are of about 70. 35kJ/mol and 44. 04kJ/mol, respectively, the related pre-exponential factors are of about 1. 27×107s-1 and 1. 78×104s-1, and the reaction order are of about 0. 897 and 0. 884, accordingly. The optimum curing procedure is determined as 140℃ for 240min and then 180℃ for 240min, the degree of curing reaction of the casting of E-44/GA327 and benzoxazine reach 96. 7% and 98. 3%. The mechanical properties of the castings are excellent, which proved the determined curing procedure is feasible.
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