为了研究超临界二氧化硅/聚醚砜/二烯丙基双酚A/双酚A双烯丙基醚/双马来酰亚胺(SCE-SiO2/PES/BBA/BBE/MBMI)复合材料的固化动力学和耐热性(BBA/BBE/MBMI以MBAE表示).利用SEM观察材料断面形貌;利用非等温DSC(差示扫描量热)法,研究复合材料的非等温固化动力学;利用热失重分析法(TGA)分析不同SiO2含量对材料耐热性影响.结果表明:当SCE-SiO2和PES含量适当时,在基体中分散均匀,且断面呈现韧性断裂;根据Kissinger方程和Oza-wa方程计算出复合材料的表观活化能分别为92.78 kJ/mol和96.65 kJ/mol,再利用Crane方程和n级动力学模型计算出固化动力学方程为:dα/dt=4.77×108(1-α)0.91e(-11.39/T),确定了固化工艺.当SCE-SiO2质量分数为2%,PES质量分数为5%时,复合材料的热稳定性最好,热分解温度为445.63℃,比掺杂前提高了5.8℃.%In order to study curing kinetics and heat resistance of supercritical silica ( SCE-SiO2 )/polyether sulfone(PES)/diallyl bisphenol A(BBA)/bisphenol A diallyl oxide(BBE)/bismaleimide(MBMI), (BBA BBE/MBMI expressed in MBAE ).The micro morphology of the fracture surface was observed by SEM .Non-isothermal curing kinetics of reaction process was studied with Differential Scanning Calorimetry ( DSC).The content of SCE-SiO2 influenced on the heat resistance of composites by thermal gravimetric analysis ( TGA) .The results showed that PES and SCE-SiO2 uniformly dispersed in matrix , when the SCE-SiO2 content and PES were appropriate , and its cross section exhibited ductile fracture , the apparent activation energy of composities were 92.78 kJ/mol and 96.65 kJ/mol according to Kissinger and Ozawa equations , respectively.The curing kinetics equation was dα/dt=4.77 ×108 (1-α)0.91e( -11.39/T) by Crane equation and the n-order kinetic model.When the content of SCE-SiO2 was 2%, PES content was 5%, the thermal stability of composites was preferably , the thermal decomposition temperature was 445.63℃and improved 5.8℃than that of undoped material .
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