新型炭材料用糠酮树脂的固化特性

Curing reaction of furfural acetone resin used for new carbon materials

采用热重法(TG)和差示扫描量热法(DSC)研究了新型炭材料用糠酮树脂的固化过程,分析固化剂含量及升温速率对固化反应的影响,确定磷酸/糠酮树脂固化体系的固化工艺,计算固化反应表观活化能和反应级数,得到了糠酮树脂固化反应动力学方程。并利用热重-质谱联用技术(TG-MS)研究树脂在固化过程中的气态产物。结果表明:糠酮树脂的固化反应是一个复杂的反应过程,升温速率和固化剂含量对固化反应都会产生重要的影响。对于本固化体系,固化剂含量以7%(质量分数)为最佳,该固化体系固化反应起始温度和最佳固化温度分别为102.32和159.07℃,反应活化能为73.33 kJ/mol,反应级数为0.9;糠酮树脂的固化反应气态产物以H2O为主,另有少量的CO、CH4和CO2。

The curing process of furfural acetone resin used for new carbon materials was studied by thermogravimetrydifferential scanning calorimetry technology （TG-DSC） and thermogravimetry-mass spectrometric coupling technique （TG-MS）. The effects of curing agent content and heating rate on curing reaction were analyzed; the curing mechanism of furfural acetone resin and gaseous products evolved during curing process were investigated. The results show that the curing agent content and heating rate both have great influence on curing reaction. In this experiment, the optimal curing agent content is 7% （mass fraction） of phosphorus acid, and for this system the initial curing temperature and the optimal curing temperature are 102.32 and 159.07℃, respectively; the apparent activation energy is 73.33 kJ/mol and the order of curing reaction is 0.9; the main gaseous products during the curing reaction are H2O and small amount of CO, CH4 and CO2.