Issue 5, 2016

Redox-controlled upper critical solution temperature behaviour of a nitroxide containing polymer in alcohol–water mixtures

Abstract

Research on stimuli responsive polymers builds momentum as nature-inspired applications using man-made materials are increasingly sought. Here, we show for the first time the thermo-responsive upper critical solution temperature (UCST) behaviour of a nitroxide containing polymer based on (2,6,6,6-tetramethylpiperidin-1-yl)oxyl (TEMPO). It is demonstrated that poly(TEMPO methacrylate) (PTMA) exhibits a UCST-type cloud point temperature in alcohol–water mixtures that can be tuned by external electrical stimuli. To exemplify this, we studied the UCST behaviour of this polymer in alcohol–water mixtures. The reversible redox response of PTMA is used to tune the thermo-responsive behaviour of the solvated polymer. The effect of the oxidation extent in PTMA on UCST is demonstrated and a correlation between the chemical and electrochemical oxidation routes is presented.

Graphical abstract: Redox-controlled upper critical solution temperature behaviour of a nitroxide containing polymer in alcohol–water mixtures

Supplementary files

Article information

Article type
Paper
Submitted
23 Nov 2015
Accepted
17 Dec 2015
First published
18 Dec 2015

Polym. Chem., 2016,7, 1088-1095

Redox-controlled upper critical solution temperature behaviour of a nitroxide containing polymer in alcohol–water mixtures

O. Bertrand, A. Vlad, R. Hoogenboom and J. Gohy, Polym. Chem., 2016, 7, 1088 DOI: 10.1039/C5PY01864A

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