摘要
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-SiO_2/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SiO_2含量对材料耐热性影响。结果表明:当SCE-SiO_2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Ozawa方程计算出复合材料的表观活化能分别为92.78 k J/mol和96.65 k J/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=4.77×10~8(1-α)0.91e(-11.39/T),确定了固化工艺。当SCE-SiO_2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-SiO_2）/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 SCESiO_2 influenced on the heat resistance of composites by thermal gravimetric analysis（ TGA）. The results showed that PES and SCE-SiO_2 uniformly dispersed in matrix,when the SCE-SiO_2 content and PES were appropriate,and its cross section exhibited ductile fracture,the apparent activation energy of composities were 92. 78 k J/mol and96. 65 k J/mol according to Kissinger and Ozawa equations,respectively. The curing kinetics equation was dα/dt =4. 77 × 10~8（ 1-α）0. 91e（-11. 39/T）by Crane equation and the n-order kinetic model. When the content of SCE-SiO_2 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.
出处
《哈尔滨理工大学学报》
CAS
北大核心
2017年第5期110-115,共6页
Journal of Harbin University of Science and Technology
基金
哈尔滨市创新人才基金(2015RAXXJ029)
