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以含烯丙基醚的双马来酰亚胺预聚体(AE-BMI)作为苯并噁嗪(BOZ)的改性剂,采用非等温差示扫描量热(DSC)法、Kissinger法、Crane法和β-T(升温速率-温度)外推法研究了AE-BMI/BOZ体系的固化动力学过程。结果表明:BOZ体系的凝胶温度为174.86℃、固化温度为210.95℃和后处理温度为222.44℃,AE-BMI/BOZ体系的凝胶温度为114.84℃、固化温度为199.75℃和后处理温度为227.64℃;两者的反应活化能分别为89.03、69.97 kJ/mol,反应级数分别为0.83、0.79。
The allyl ether-containing bismaleimide prepolymer (AE-BMI) was used as the modifier of benzoxazine (BOZ) by non-isothermal differential scanning calorimetry (DSC) Crane method and β-T (heating rate-temperature) extrapolation of AE-BMI / BOZ system curing kinetics. The results showed that the gel temperature of BOZ system was 174.86 ℃, the curing temperature was 210.95 ℃ and the post-treatment temperature was 222.44 ℃. The gel temperature of AE-BMI / BOZ system was 114.84 ℃, the curing temperature was 199.75 ℃ and the post-treatment temperature was 227.64 ℃. The activation energies of the two reactions were 89.03 and 69.97 kJ / mol, respectively, and the reaction orders were 0.83 and 0.79 respectively.