Determination of the Hydrogenation State of Benzene by the Thermally Induced Phase Separation of Poly(ethersulfone)s
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초록
내용
The thermally induced phase separation of poly(ethersulfone) (PES) in organic solvents is applied as a sensor in detecting the hydrogenation state of benzene. As a non-solvent of PES, the addition of benzene and its reduction products lowers the clouding point temperature (Tcp) of the polymer solution. The Tcp decreases as the number of π electrons decreases, and a linear correlation between the temperature and concentration is obtained. The Tcp of the polymer solution changes quite sensitively even with the addition of a small amount of analyte. In addition, the Tcp of the mixed system can be predicted according to the proportion of components, and the calculated results are found to be in good agreement with the experimental results.