PEG改性蜜胺树脂热解特性及其动力学研究

Study on Characteristics and Kinetics of Pyrolysis of PEG Modified melamine resin

用热重法分析了PEG改性蜜胺树脂的热解过程,其最大热解温度在393.1℃左右,比未改性树脂降低了18.4℃,PEG的加入使蜜胺树脂柔韧性有所提高,但对其耐热性能有一定不良影响.利用无模式函数法计算出反应活化能、指前因子,并对OFW法、Friedman法、Kissinger法的计算结果进行对比分析,PEG改性蜜胺树脂的热解动力学参数以Friedman法计算结果为参考,表观活化能E=190.282 5 kJ·mol-1,指前因子lgA=14.647 8.

Pyrolysis process of the PEG modified melamine resin is analyzed with thermogravimetric method,its maximum pyrolysis temperature is about 393.1 ℃,lower 18.4 ℃ than unmodified resin,the toughness of the melamine resin with PEG was improved,though the fire-retardant property of the modified resin was reduced. Activation energy,pre-exponential factor are caculated with model-free method, then calculation results of OFW method,Friedman method and Kissinger method were compared,Friedman method＇s calculation result is used as a reference to its pyrolysis kinetic parameters,the apparent activation energy：E=190.282 5 kJ·mol-1,pre-exponential factor： lgA=14.647 8.