Rapid, On-Command Debonding of Stimuli-Responsive Cross-Linked Adhesives by Continuous, Sequential Quinone Methide Elimination Reactions

Angewandte Chemie
Hyungwoo KimScott T Phillips

Abstract

Adhesives that selectively debond from a surface by stimuli-induced head-to-tail continuous depolymerization of poly(benzyl ether) macro-cross-linkers within a poly(norbornene) matrix are described. Continuous head-to-tail depolymerization provides faster rates of response than can be achieved using a small-molecule cross-linker, as well as responses to lower stimulus concentrations. Shear-stress values for glass held together by the adhesive reach 0.51±0.10 MPa, whereas signal-induced depolymerization via quinone methide intermediates reduces the shear stress values to 0.05±0.02 MPa. Changing the length of the macro-cross-linkers alters the time required for debonding, and thus enables the programmed sequential release of specific layers in a glass composite material.

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Citations

Dec 16, 2016·Nature·Jason F PatrickScott R White
Oct 2, 2019·Advanced Materials·Christoph ButenBart Jan Ravoo
Jun 5, 2021·ACS Applied Materials & Interfaces·Katie M HerbertStuart J Rowan
Jun 11, 2021·ACS Applied Materials & Interfaces·Yen-Ming TsengAbraham Joy
Jan 28, 2020·Journal of the American Chemical Society·Samuel D DahlhauserEric V Anslyn
May 8, 2018·ACS Omega·Michael T GamblesElizabeth R Gillies
Jul 20, 2021·Angewandte Chemie·Asger Holm AgergaardKim Daasbjerg

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