木质素磺酸钙热行为初步研究

Study on the Thermal Behaviour of Calcium Lignosulfonate

采用差示扫描量热分析 (DSC)、热重分析 (TG)和升温红外光谱研究木质素磺酸钙的热行为 ,发现在室温到 40 0℃的范围内 ,木质素磺酸钙有三个主要的转变。第一个转变发生在较低温度范围内 ,可能与木质素磺酸钙的脱水和甲醛等小分子的反应相关 ;第二个转变的转变峰顶温度在 30 0℃附近 ,与木质素的高温缩合反应相关 ;第三个转变为热分解反应 ,与第二个转变紧密相接。文章认为 。

Thermal behavior calcium lignosulfonate was studied by differential scanning calorimetry(DSC),thermogravimetry(TG) and heated infrared spectroscopy.Three main changes of the calcium lignosulfonate were observed during a change of temperature from room temperature to 400℃.The first change relating with removing of water and aldehyde took place at a lower temperature.The peak temperature of the second change is about 300℃,and is probably due to a condensation occurred at the high temperature.The third change closely following the second change was thermal decomposition of the calcium lignosulfonate.It was also suggested that the heat history of calcium lignosulfonate could be deduced from its heated DSC curves.