漆酚-IPDI体系等温DSC固化动力学研究

Study on the Isothermal DSC Curing Kinetics of Urushiol-Based Polyurethane System

采用差示扫描量热(DSC)研究了30-65℃下漆酚与IPDI的等温固化反应动力学。使用n阶反应模型,自催化模型和Kamal模型对实验数据进行拟合处理。结果表明,单一反应的n阶模型不适合描述漆酚-IPDI体系等温固化动力学,自催化和Kamal模型更适用于描述漆酚聚氨酯体系固化动力学过程,同时利用了Arrhenius方程对反应体系的活化能进行计算得到Ea_(1)为60.135kJ·mol^(-1),Ea_(2)为83.581kJ·mol^(-1),该模型可用于漆酚基材料的工艺优化和进一步开发。

The isothermal curing reaction kinetics of urushiol and IPDI at 30-65℃were studied by using differential scanning calorimetry(DSC).The experimental data were fitted by using n-order reaction model,autocatalytic model and Kamal model.The results showed that the single n-order reaction model was not suitable for describing the isothermal curing kinetics of the urushiol and IPDI system,and the autocatalytic and Kamal models were more appropriate for describing the curing kinetics process of urushiolbased polyurethane system.Additionally,the activation energy of the reaction system was calculated using the Arrhenius equation,and Ea_(1) was 60.135kJ·mol^(-1) and Ea_(2) was 83.581kJ·mol^(-1).These models can be used for the process optimization and further development of urushiol-based materials.