【作者】 秦旭锋；

【导师】 李玲；

【作者基本信息】 中北大学 ， 材料学， 2012， 硕士

【摘要】 双马来酰亚胺(BMI)与环氧树脂(EP),常作为复合材料基体、涂料、胶黏剂,被广泛应用于航空航天、交通、化工、建筑等领域。但随着电气工业及航空航天等领域的发展,由于使用条件越来越苛刻,对材料的耐热性提出更为严格的要求,所以开发高耐热BMI和EP显得尤为重要。为进一步提高BMI和海因环氧树脂(HY)的耐热性,将高耐热性钼酚醛树脂(Mo-PF)作为改性剂对BMI和HY进行改性。在一定条件下,以苯酚、甲醛、钼酸及催化剂氢氧化钠为原料合成热固性Mo-PF。运用FTIR考察了树脂的化学结构；GPC分析得出,所合成的Mo-PF的重均分子量在918左右,树脂主要由二聚体或三聚体构成；通过凝胶时间曲线求得Mo-PF固化反应活化能为28.219kJ/mol。TG分析得,900℃时,Mo-PF的残炭率为20%左右。以Mo-PF为改性剂(质量分数分别为10%、30%)对BMI进行共混改性,通过DTA对树脂体系的固化反应动力学进行研究,推导Mo-PF(10%)/BMI体系的固化反应动力学方程为推导Mo-PF(30%)/BMI体系的固化反应动力学方程为通过TG对树脂固化物的热分解动力学进行研究,推导钼酚醛树脂(10%)/BMI体系的分解反应动力学方程为推导钼酚醛树脂(30%)/BMI体系的热分解反应动力学方程为以Mo-PF为改性剂(质量分数为50%)对HY进行共混改性,通过DTA对Mo-PF/HY体系的固化反应动力学进行研究,因树脂体系的固化反应比较复杂,故研究分两个阶段进行,推导Mo-PF/HY体系固化反应第一阶段动力学方程为第二阶段的动力学方程为通过TG对树脂体系固化物的热分解动力学进行研究,推导Mo-PF/HY体系的热分解反应动力学方程为da/dt=2.47×108exp(-26564.8/T)(1-a)1.02。更多还原

【Abstract】 BMI and EP are widely used in aerospace, transportation, construction and so on. Butwith the development of electric industry, aerospace, strict conditions of use are increasinglydemanding, requirements of heat resistance of materials are put forward more strict, so thedevelopment of BMI and EP with high heat resistant is very important.In this paper, molebdenum-phenolic resol resin were sythetised at first, and then BMIand hydantoin epoxy resin were modified by it. Many modern analysis techniques were usedto characterizated the microstructure, solidification performance, thermal decompositionproperties of molybdenum phenolic resin, Mo-PF / BMI, Mo-PF / hydantoin epoxy resin.Molebdenum-phenolic resol resin was synthesized by phenol, formaldehyde, molybdateand sodium hydroxide. Optimal synthesis technology was obtained by orthogonal test withchar yields as index. Curing reaction of the resin was investigated by FTIR. Molecular weightdistribution of the resin was characterizated by GPC. The curing reaction activation energywas analyzed by gel time at different temperatures. Thermal stability was characterizated byTG.BMI was modified by Mo-PF, curing reaction kinetics of the system was characterizatedby DTA.Thermal decomposition kinetics was characterizated by TG.The kinetic equation wasdeduced by various kinetic parameters of the system.Hydantoin epoxy resin was modified by Mo-PF, curing reaction kinetics of the systemwas characterizated by DTA.Thermal decomposition kinetics was characterizated by TG.Thekinetic equation was deduced by various kinetic parameters of the system.更多还原