基于热重分析法的喷涂聚脲的寿命预测  

Life Prediction of Spray Polyurea Based on Thermogravimetric Analysis

作　　者：刘晓文 王宝柱 岳长山 张沪伟 王吉利 邵春妍 LIU Xiaowen;WANG Baozhu;YUE Changshan;ZHANG Huwei;WANG Jili;SHAO Chunyan(Qingdao Polyurea Elastic Key Laboratory,Qingdao Aierjiajia New Materials Co.Ltd,Qingdao 266111,China)

机构地区：[1]青岛市聚脲弹性体重点实验室青岛爱尔家佳新材料股份有限公司,山东青岛266111

出　　处：《聚氨酯工业》2023年第6期22-25,共4页Polyurethane Industry

基　　金：山东省科技型中小企业创新能力提升工程(编号:2022TSGC1116)。

摘　　要：采用4种升温速率对聚脲进行了热降解动力学分析,通过Arrhenius方程和Kissinger方法拟合出其降解5%时的动力学参数,从而对聚脲的使用寿命进行了预测。结果表明:该聚脲试样降解5%时的活化能E=105.11 kJ/mol、反应级数n=2.91、指前因子A=e21.11,使用寿命与温度关系式为lntf=12643/T-21.66;计算可知,该聚脲试样在60℃下使用寿命为22年,80℃下使用寿命为2年,100℃下使用寿命仅4个月。The thermal degradation kinetics of polyurea was analyzed with four heating rates,and the dynamic mechanical parameters at 5%degradation were fitted by Arrhenius equation and Kissinger equation,thus the service life of polyurea was predicted.The results showed that the activation energy E of the polyurea was 105.11 kJ/mol,the reaction order n was 2.91,the pre-exponential factor A was e21.11,and the relationship between service life and temperature was lntf=12643/T-21.66,when the polyurea degraded 5%.It could be predicted that the service life of the polyurea sample was 22 years at 60℃,2 years at 80℃,and only 4 months at 100℃by calculation.

关 键 词：喷涂聚脲 热重分析 热稳定性 热降解动力学 寿命预测 

分 类 号：TQ333.95[化学工程—橡胶工业]