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Observing Phase Transition of a Temperature-Responsive Polymer Using Electrochemical Collisions on an Ultramicroelectrode
- Authors
- Hoang, Nhung T. T.; Lee, Jinhee; Lee, Byungyong; Kim, Hae-Young; Lee, Jungeun; Nguyen, Truc Ly; Seo, Myungeun; Kim, Sang Youl; Kim, Byung-Kwon
- Issue Date
- Jun-2018
- Publisher
- AMER CHEMICAL SOC
- Citation
- ANALYTICAL CHEMISTRY, v.90, no.12, pp 7261 - 7266
- Pages
- 6
- Journal Title
- ANALYTICAL CHEMISTRY
- Volume
- 90
- Number
- 12
- Start Page
- 7261
- End Page
- 7266
- ISSN
- 0003-2700
1520-6882
- Abstract
- Herein, a study on a new lower critical solution temperature (LCST) polymer in an organic solvent by an electrochemical technique has been reported. The phase-transition behavior of poly(arylene ether sulfone) (PAES) was examined on 1,2-dimethoxyethane (DME). At a temperature above the LCST point, polymer molecules aggregated to create polymer droplets. These droplets subsequently collided with an ultramicroelectrode (UME), resulting in a new form of staircase current decrease. The experimental collision frequency and collision signal were analyzed in relation to the concentration of the polymer. In addition, the degree of polymer aggregation associated with temperature change was also observed.
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