摘要
采用非等温DSC法对氰酸酯胶黏剂的固化反应行为以及固化动力学进行了研究。利用Kissinger和Flynn-Wall-Ozawa动力学模型计算得到体系固化反应的表观活化能分别为101.3 kJ·mol^-1及99.4 kJ·mol^-1,通过Crane模型计算出固化反应级数为0.92,并构建了体系固化度与温度及时间关系的固化模型。利用"T-β"及"t-β"外推法获得体系固化反应温度及固化时间,强度实验证实了工艺参数设计的有效性。研究结果可为氰酸酯基胶黏剂的固化工艺及应用提供理论指导。
The non-isothermal reaction kinetics of cyanate ester system was investigated by dynamic differential scanning calorimetry(DSC).The analysis of non-isothermal data was carried out by using the model-fitting Kissinger,Flynn-Wall-Ozawa,and Crane methods.The results indicate that the apparent activation energy of the curing reaction is 101.3 kJ·mol^-1 and 99.4 kJ·mol^-1calculated from Kissinger and Flynn-Wall-Ozawa models,respectively.The reaction sequence of the adhesive is 0.92 calculated from Crane model.In addition,the relationship of the curing degree with the curing temperature and the curing time is established.The curing parameters are obtained by adopting"T-β"and"t-β"extrapolation,and the strength test proves the validity of the curing parameters designed in this paper.These results constitute a theoretical basis for the curing and application of the cyanate ester adhesives.
作者
何端鹏
高鸿
邢焰
李岩
王向轲
HE Duan-peng;GAO Hong;XING Yan;LI Yan;WANG Xiang-ke(Material Reliability Center,China Academy of Space Technology,Beijing 100094,China)
出处
《材料工程》
EI
CAS
CSCD
北大核心
2020年第10期60-67,共8页
Journal of Materials Engineering
