摘要
制备了苯并噁嗪树脂/BMI/环氧树脂三元体系,采用动态DSC分析了三元体系的固化反应过程。并用Kissinger和Ozawa方法分别求得三元体系的反应活化能为89.5 kJ/mol。由Crane理论计算得到该体系的固化反应级数n=0.93级反应;根据计算的动力学参数,建立了三元体系的固化动力学模型。利用所建立的固化动力学模型分别预测了等温和动态条件下,三元体系的固化反应特性。得到了三元体系的固化工艺为180℃/1 h+200℃/2 h+230℃/2 h,后处理工艺为250℃/2 h。
We have developed new polymeric systems based on the ternary mixture of typical benzoxazine monomers with a typical modification bismaleimide and epoxy resin.Non-isothermal differential scanning calorimetry（DSC） was used to follow the curing reaction.The analyses showed that there are a exothermic reaction peak from 164℃ to 306℃ for the modification benzoxazine/bismaleimide/epoxy resin system and top of the peak is 240℃,which confirmed main reaction of modification benzoxazine/bismaleimide/epoxy resin system.The curing process temperatures such as gelation temperature（Tgel）=151℃,curing temperature（Tp）=224℃ and post-curing（Ttreat）=295℃ were acquired.The reaction energy of the modification benzoxazine/bismaleimide/epoxy resin system was 89.5 kJ/mol and the reaction level is 0.93 by using Kissinger and Crane equation.The cure kinetic model of the curing process based on n order reaction equation was established,which was used for simulation of the curing reaction characteristics.Curing technics is 180℃/1 h＋200℃/2 h＋230℃/2 h,post-curing technics is 250℃/2 h.
出处
《宇航材料工艺》
CAS
CSCD
北大核心
2010年第5期72-76,共5页
Aerospace Materials & Technology
基金
国防预研资助项目
山西省自然基金资助(20051014)
关键词
苯并噁嗪
活化能
环氧树脂
双马来酰亚胺
固化
Benzoxazion
Reaction energy
Epoxy resin
Modified bismaleimide
Simulation
