低温发泡用热固性酚醛树脂的固化动力学研究

Curing Kinetics of Thermosetting Phenolic Resin with Low Temperature Foaming

以合成的低温发泡用热固性酚醛树脂和固化剂为主要材料,采用差示扫描量热法研究其在不同升温速率下的固化反应过程,利用Kissinger模型和Ozawa模型研究其固化动力学,得到不同固化剂用量条件下的动力学参数和规律。结果表明,Kissinger模型和Ozawa模型获得的固化反应表观活化能分别为82.47~99.60kJ·mol^(-1)和83.61~100.00kJ·mol^(-1),两种模型得到的固化反应表观活化能几乎相等,且均随固化剂用量的增加而降低。

Using curing agent and thermosetting phenolic resin with property of low temperature foaming as the main materials,a curing reaction process was studied by differential scanning calorimetry （DSC） at different heating rates,and kinetic parameters and rules were obtained under different curing agent dosages through the study of curing kinetics by Kissinger and Ozawa models. The results showed that,the apparent activation energies of curing reaction were 82.47-99.60 kJ · mol^-1and 83.61-100.00 kJ ·mol^-1 by Kissinger and Ozawa models, respectively, and the approximate activation energies obtained from both methods decreased with the increase of curing agent dosage.