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High-Resolution Thermogravimetry of Cellulose Esters

机译:纤维素酯的高分辨率热重分析

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摘要

Cellulose dinitrate (CDN),cellulose diacetate (CDA),and cellulose triac-etate (CTA) were subjected to high-resolution thermogravimetry (TG0 at a variable heating rate in air.The TG curves,the derivative TG curves,the second derivative Tg curves,and heating rate curves are discussed.The thermal degradation temperature and kinetic parameters are presented and compared to those obtained with traditional TG at a constant heating rate.The degradation process of the cellulose esters is speculated.Among the three cellulose esters,CDN exhibits the lowest degradation temperature of (213degC) but the largest degradation activation energy of (237-269 kJ/mol).
机译:对二硝酸纤维素(CDN),二醋酸纤维素(CDA)和三乙酸纤维素(CTA)进行高分辨率热重分析(TG0在空气中以可变的加热速率进行分析.TG曲线,导数TG曲线,二阶导数Tg给出了热降解温度和动力学参数,并将其与传统TG在恒定加热速率下获得的热降解温度和动力学参数进行了比较。推测了纤维素酯的降解过程。在三种纤维素酯中,CDN表现出最低的降解温度为(213℃),最大的降解活化能为(237-269 kJ / mol)。

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