Controlling a polymer adhesive using light and a molecular switch.
2014
A thermally remendable polymer was synthesized by the Diels–Alder reaction between dithienylfuran and maleimide monomers to generate a photoresponsive diarylethene. UV light (312 nm) and visible light (>435 nm) “gate” the reversibility of the Diels–Alder reaction and turn the self-healing properties of the polymer “off” and “on”, respectively. After exposure to UV light, the strength of the polymer as an adhesive is enhanced. Visible light weakens the adhesive.
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