摘要
研究差示扫描量热分析(DSC)法测定硬脂酸凝固点的影响因素,对比DSC法与手工法(按GB/T 9104—2008《工业硬脂酸试验方法》进行)测定硬脂酸凝固点的异同。结果表明:DSC法测定硬脂酸凝固点的优化试验条件为样品用量10 mg,氮气流速20 m L·min^(-1),熔化温度70℃,冷却速率5℃·min^(-1);与手工法测定硬脂酸凝固点相比,DSC法操作简便、快速,试样用量小,测试精密度高和重复性好。
In this study, testing of the solidification point of stearic acid by differential scanning calorimetry （ DSC ） was investigated and testing parameters were optimized. Similarities and differences between DSC method and manual method which was according to GB/T 9104--2008, Stearic Acid Test Method were compared. The results showed that the optimal testing parameters of the DSC method were as follows： sample weight 10 mg, carrier gas flow rate 20 mL· min-1, melting temperature 70 ℃, and cooling rate 5 ℃ · min-1. Compared with manual method, DSC method was simple and fast, required only a small amount of sample, and the test presented high precision and good measurement repeatability.
作者
丁兆娟
吕延延
张艳玲
吴爱芹
刘爱芹
DING Zhaojuan LYU Yanyan ZHANG Yanling WU Aiqin LIU A iqin(Stone Testing Technology Co. , Ltd, Qingdao 266042,Chin)
出处
《橡胶科技》
2017年第1期44-46,共3页
Rubber Science and Technology
关键词
硬脂酸
凝固点
差示扫描量热分析
stearic acid
solidification point
differential scanning calorimetry
