基于热失重分析对聚合物发泡剂ADC发气量测定方法的研究

Study on measurement method of gas evolution of foaming agent ADC based on thermogravimetric analysis

根据偶氮二甲酰胺(ADC)热分解第一阶段(200~240℃)的分解方程式,建立ADC的分解过程与发气过程之间的函数关系式,将ADC的热失重(TG)曲线转变为TG发气曲线。结果表明,通过对比发泡剂ADC的TG发气曲线和排水集气法测定的发气曲线,得出两种测定方法测得ADC的起发温度、最大发气速率温度、终止发气温度等数据非常接近,两条曲线与拟合曲线的对比Adjusted R-Square分别达到0.9937和0.91543,因此,在ADC热分解第一阶段(200~240℃),ADC的TG发气曲线可以通过TG曲线计算得到,并可以替代传统的排水集气法测定的发气曲线。

According to the decomposition equation of the first stage of azodicarbon amide(ADC)thermal decomposition in the temperature range of 200~240℃,the functional relationship between ADC decomposition process and gas generation process was established,and the thermal weight loss curve of ADC was transformed into TG gas-generation curve.The results indicated that by comparing the TG gas-generation curve of foaming agent ADC and the gas-generation curve measured by the drainage gas-gathering method,the data of starting temperature,maximum gas-generation-rate temperature,and ending gas-generation temperature of ADC measured by the two methods were very close with each other.The comparison adjusted R-squares between the two curves and the fitting curve were 0.9937 and 0.91543,respectively,In the first stage of ADC thermal decomposition,the TG gas-generation curve of ADC can be calculated using a TG gasgeneration curve formula,which can replace the gas-generation curve measured by traditional drainage gas-gathering methods.