采用热重分析法测定橡胶灰分含量  

Determination of ash content of rubber by thermogravimetric analysis

作　　者：李晓银 宋洁瑞 贾慧青 杨芳 LI Xiao-yin;SONG Jie-rui;JIA Hui-qing;YANG Fang(Lanzhou Petrochemical Research Center,Petrochemical Research Institute,PetroChina,Lanzhou 730060,China)

机构地区：[1]中国石油石油化工研究院兰州化工研究中心,兰州730060

出　　处：《合成橡胶工业》2023年第6期465-469,共5页China Synthetic Rubber Industry

摘　　要：采用热重分析法(TGA)测定了橡胶的灰分含量,考察了试样量、样品代表性、升温速率、燃烧温度和燃烧气氛等因素对测定结果的影响,同时确定了TGA的重复性和再现性。结果表明,TGA的最佳测试条件为样品量10~20 mg,升温速率为20℃/min或30℃/min,生胶和混炼胶(或硫化胶)的燃烧温度分别为550℃和650℃;TGA的重复性和再现性较好,当4种不同橡胶的灰分质量分数为0.29%~5.12%时,TGA实验室内重复性达到0.110%~0.303%,实验室间再现性达到0.283%~0.676%。The ash content of rubber was determined by thermogravimetric analysis(TGA)and the effects of sample amount,sample representativeness,heating rate,combustion temperature and combustion atmosphere on the test results were studied and the repeatability and reproducibility of the method were determined.The results showed that the optimal conditions of TGA were sample mass between 10 mg and 20 mg,heating rate of 20℃/min or 30℃/min,combustion temperature for raw rubber and compounded rubber(or vulcanized rubber)of 550℃and 650℃,respectively.The repeatability and reproducibility of TGA were all good.When ash mass fraction of 4 types of different rubbers were from 0.29%to 5.12%,the repeatability within laboratory was from 0.110%to 0.303%,and the reproducibility between laboratories was from 0.283%to 0.676%.

关 键 词：热重分析法 橡胶 灰分含量 精密度 实验室间试验方案 重复性 再现性 

分 类 号：TQ330.72[化学工程—橡胶工业]