电化学法测定聚合物制品中的聚四氟乙烯含量  

Determination of Polytetrafluoroethylene Content in Polymerproducts by Electrochemical Method

作　　者：杨常桥[1,2] 吴国忠[2] 曾虹燕[1] 王谋华[2] 邢哲[2] 钟磊[2] 

机构地区：[1]湘潭大学化工学院,湖南湘潭411105 [2]中国科学院上海应用物理研究所,上海201800

出　　处：《分析科学学报》2013年第2期211-214,共4页Journal of Analytical Science

基　　金：国家自然科学基金(No.10775173);上海市优秀学科带头人计划(No.07XD14037)

摘　　要：基于聚四氟乙烯(PTFE)在氧气中燃烧生成HF等含氟气体,溶于缓冲溶液后能转化为氟离子的特性,建立了利用氟离子选择电极测定聚合物制品中PTFE含量的电化学分析方法。根据对聚四氟乙烯/聚乙烯(PTFE/PE)混合蜡、PTFE改性工程塑料、PTFE改性轴承等一系列样品的测试,发现该方法不仅精确度高,而且可操作性强,在PTFE含量大于10%时,测量误差小于2%。方法非常适用于含PTFE制品的质量控制和未知样品的分析测试。Polytetrafluoroethylene （PTFE） can produce a series of fluorine-containing gases such as HF after combusted in oxygen and the gases can transform into fluorine ions when dissolved in buffer solution. A novel electrochemical method for determining the PTFE content in solid polymers by using fluorine ion selective electrode was established. According to the tests of a series samples of PTFE/PE mixed wax, PTFE modified engineering plastics and plastic bearings, this method was proved to be accurate and operable. The measurement error was less than 2% when PTFE content was more than 10%. The proposed method is suitable for the analysis of the PTFE-containing products,quality control and testing of unknown samples, and will play an important role in the industrial production and scientific research.

关 键 词：聚四氟乙烯 电化学法 氟离子选择电极 PTFE蜡粉 改性塑料 

分 类 号：O657.15[理学—分析化学]