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采用N-[(4-溴-3,5-二氟)苯基]马来酰亚胺/苯乙烯/马来酸酐(BDPM/St/MA)三元共聚物作为固化剂固化E-44环氧树脂,通过示差扫描量热法(DSC)对该体系的固化行为及非等温固化动力学进行了研究。通过Kissinger法计算得到的表观活化能为40.15 k J/mol,指前因子为1.19×10~4;通过Ozawa法计算得到的表观活化能为45.23 k J/mol。对固化后的环氧树脂E-44的热分析表明,BDPM/St/MA固化材料的初始分解温度,20%热失重温度和550℃时的残余质量分别比甲基四氢苯酐固化体系高32.1℃,17.2℃和13.5%。BDPM/St/MA三元共聚物能够较好地改善环氧树脂的热稳定性。
E-44 rings were cured using N - [(4-bromo-3,5-difluoro) phenyl] maleimide / styrene / maleic anhydride (BDPM / St / MA) terpolymer as a curing agent Oxygen resin, the curing behavior and non-isothermal curing kinetics of the system were investigated by differential scanning calorimetry (DSC). The apparent activation energy calculated by Kissinger method is 40.15 kJ / mol and the pre-exponential factor is 1.19 × 10 ~ 4. The apparent activation energy calculated by Ozawa method is 45.23 kJ / mol. Thermal analysis of the cured Epoxy Resin E-44 shows that the initial decomposition temperature, the 20% weight loss temperature and the residual mass at 550 ℃ of the BDPM / St / MA cured material are respectively 32.1 higher than the methyl tetrahydrophthalic anhydride curing system ° C, 17.2 ° C and 13.5%. BDPM / St / MA terpolymer can better improve the thermal stability of epoxy resin.