热重分析法测定聚酰胺-酰亚胺分解反应的活化能  

Determination of Activation Energy of Polyamide-imide Decomposition Reaction by Thermogravimetry

作　　者：褚然然 张强 李伶通 王栋栋 曲延涛 Chu Ranran;Zhang Qiang;Li Lingtong;Wang Dongdong;Qu Yantao(Jinan Technology Research Institute of New Material Industry,Jinan 250000,China)

机构地区：[1]济南新材料产业技术研究院,山东济南250000

出　　处：《山东化工》2024年第5期139-141,共3页Shandong Chemical Industry

摘　　要：聚酰胺-酰亚胺(PAI)是分子中酰胺键和酰亚胺键交替存在的一类非晶热塑型聚合物,PAI材料的热稳定性决定其在加工使用过程中的可靠性,但目前关于PAI热分解动力学研究相对较少。通过对市售PAI样品和研究院自产PAI样品分别在不同升温速率5,10,15℃/min条件下进行热重分析实验,根据Ozawa-Flynn-Wall法求算热分解反应的活化能:市售PAI颗粒状样品活化能Ea=343.70 J·mol^(-1),研究院自产颗粒样品Ea=318.29 J·mol^(-1)、粉末样品Ea=233.92 J·mol^(-1)。结果表明研究院自产PAI样品的热分解稳定性与市售样品基本一致,同时样品加工方式对热分解温度有重要影响,市售颗粒样品堆积密度1.3845 g/cm^(3)大于研究院自产样品堆积密度1.226 g/cm^(3),热分解温度略高,活化能稍大。Polyamide-imide(PAI)is a kind of amorphous thermoplastic polymer with alternating amide and imide bonds in the molecule.The thermal stability of PAI materials determines its reliability in processing and application,but there are relatively few studies on the thermal decomposition kinetics of PAI at present.The activation energy of the thermal decomposition reaction was calculated according to the Ozawa-Flynn-Wall method by performing thermogravimetric analysis experiments on commercially available PAI samples and PAI samples produced by the institute at different heating rates of 5,10 and 15℃/min,respectively.The activation energy of the commercially available PAI particle sample was Ea=343.70 J·mol^(-1),the particle sample produced by the institute was Ea=318.29 J·mol^(-1)and the powder sample was Ea=233.92 J·mol^(-1).The results show that the thermal decomposition stability of PAI samples produced by the institute is basically the same as that of commercial PAI samples,and the sample processing method has an important influence on thermal decomposition temperature.The bulk density of commercial particle samples is 1.3845 g·cm^(-3),which is higher than that of domestic sample 1.226 g·cm^(-3),and the thermal decomposition temperature is higher and the activation energy is higher.

关 键 词：聚酰胺-酰亚胺(PAI) 热重 活化能 

分 类 号：O657.3[理学—分析化学]