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采用示差扫描量热法(DSC)研究了端羟基聚丁二烯(HTPB)改性双酚A型氰酸酯树脂(BADCy)体系的固化反应动力学,根据Arrhenius方程对固化过程动力学参数进行了求解,建立了固化反应动力学模型。结果表明,随着HTPB含量的增大,动态DSC固化反应放热峰向低温方向移动,说明HTPB可以催化固化反应并降低体系的反应温度。纯BADCy和BADCy/15%HTPB体系等温固化符合自催化反应模型。纯BADCy体系以及BADCy/15%HTPB体系的表观反应活化能分别为59.67 kJ/mol、56.91 kJ/mol。
The curing reaction kinetics of hydroxyl-terminated polybutadiene (HTPB) -modified bisphenol A cyanate ester resin (BADCy) was investigated by differential scanning calorimetry (DSC). The kinetic parameters of the curing process were determined by Arrhenius equation Solved, established a solidification reaction kinetics model. The results showed that with the increase of HTPB content, the exothermic peak of the dynamic DSC curing reaction shifted to the low temperature, indicating that HTPB can catalyze the curing reaction and reduce the reaction temperature of the system. Isothermal curing of pure BADCy and BADCy / 15% HTPB systems conforms to the autocatalytic reaction model. The apparent activation energies of pure BADCy system and BADCy / 15% HTPB system were 59.67 kJ / mol and 56.91 kJ / mol, respectively.