3种苯乙烯系离子交换树脂功能基团的热失重分析  

THERMAL GRAVIMETRIC ANALYSIS ON FUNCTIONAL GROUP OF STYRENE ION EXCHANGE RESINS

作　　者：钱浩[1] 彭奇均[1] 张军伟[1] 

机构地区：[1]江南大学化学与材料工程学院、食品胶体与生物技术教育部重点实验室,无锡214122

出　　处：《离子交换与吸附》2012年第5期413-422,共10页Ion Exchange and Adsorption

基　　金：中央高校基本科研业务费专项资金资助(NO.JUSRP11205)

摘　　要：通过热失重法结合红外光谱及元素分析,从功能基团的分解温度、分解率及不同功能基团树脂骨架的分解温度等方面入手,研究了3种苯乙烯系离子交换树脂功能基团的热分解。结果表明,25-600℃范围内,3种树脂的热分解分为3个阶段,即存在3个失重台阶,其中强酸、强碱树脂功能基团的分解发生在二阶上,而弱碱树脂发生在一阶和二阶上。进一步分析热失重发现,通过延长热解时间可以使强碱树脂功能基团完全分解,而强酸和弱碱树脂的功能基团则只能部分分解。同时热失重法在一定条件下可作为树脂功能基团定量分析的参考依据。本文的研究对于离子交换树脂行业有一定参考意义。The thermal degradation of three kinds of ion-exchange resins based on polystyrene was studied by thermogravimetry, elemental analysis and Fourier Transform Infrared Spectroscopy, mainly focused on degradation temperature of different functional groups and degradation temperature of the framework with different functional groups. The thermogravimetric analysis process of three kinds of ion-exchange resins were divided as three degradation stages at 25-600℃. Thermolysis results indicated that degradation of functional groups of strong acid and strong base resin occurred in the second step, whereas degradation of functional group of weak base resin occurred in the first step and second step. Further study demonstrated that strong acid and weak base resins were part of weightlessness, with the comparison that strong base resin was complete weightlessness by increasing heating time. Thus the thermogravimetry gave a quantitative result of functional groups. This study will contribute to the ion exchange resin industry.

关 键 词：离子交换树脂 功能基团 定量分析 热失重 红外光谱 元素分析 

分 类 号：O631[理学—高分子化学]