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Issue 19, 2018
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Combining uretdione and disulfide reversibly degradable polyurethanes: route to alternating block copolymers

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Abstract

Uretdione (temperature and catalyst controlled) and disulphide (REDOX controlled) functionalised polyurethanes have been described and the reversibility of these bonds tested. The polymers have been synthesised with reversible covalent groups present throughout their backbone, developing routes to reversibly degradable polyurethanes. These materials degrade and reheal in response to different external stimuli, which supplies a proof of concept for controlling the molecular weight, and therefore, the physical properties of a polyurethane. Further, a unique route to an alternating block copolymer is also discussed that utilises a mixture of disulphide and uretdione functionalised polymers as the reagents to form a thiourethane. The dramatically reduced safety hazards of dealing with the functionalised polymers, in comparison to the free isocyanate and thiols, could be of great interest to industrial application for current drives towards safer routes to polyurethanes.

Graphical abstract: Combining uretdione and disulfide reversibly degradable polyurethanes: route to alternating block copolymers

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Publication details

The article was received on 23 Nov 2017, accepted on 06 Apr 2018 and first published on 09 Apr 2018


Article type: Paper
DOI: 10.1039/C7PY01978E
Citation: Polym. Chem., 2018,9, 2611-2616
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    Combining uretdione and disulfide reversibly degradable polyurethanes: route to alternating block copolymers

    C. J. Summers, R. Day, U. Makal and D. M. Haddleton, Polym. Chem., 2018, 9, 2611
    DOI: 10.1039/C7PY01978E

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