Thermally and base triggered ‘debond-on-demand’ chain-extended polyurethane adhesives

Hyder, M. J., Godleman, J., Chippindale, A. M. ORCID: https://orcid.org/0000-0002-5918-8701, Hallett, J. E. ORCID: https://orcid.org/0000-0002-9747-9980, Zinn, T., Harries, J. L. and Hayes, W. ORCID: https://orcid.org/0000-0003-0047-2991 (2025) Thermally and base triggered ‘debond-on-demand’ chain-extended polyurethane adhesives. Macromolecules, 58 (1). pp. 681-696. ISSN 0024-9297 doi: 10.1021/acs.macromol.4c02775

Abstract/Summary

A series of novel chain-extended polyurethanes (CEPUs) featuring degradable sulfonyl ethyl urethane chain-extenders that permit degradation under base triggered conditions to afford ‘debond-on-demand’ elastomeric adhesives are reported. Exposure of the CEPUs to tetra-butylammonium fluoride (TBAF) triggered the degradation of the sulfonyl ethyl urethane chain-extenders. Lap shear adhesion tests of the CEPUs exposed to TBAF revealed reductions in shear strength of up to 65% for both aluminium and glass substrates, from 2.18 MPa to 0.76 MPa and from 1.13 MPa to 0.52 MPa, respectively. The selective depolymerisation of these polymers make them suitable candidates as debondable binders for inkjet inks and coatings enabling removal of inks and adhesive residues from substrates before they enter the recycling process, to prevent surface contaminants decreasing the quality of the recycled material.

Item Type	Article
URI	https://reading-clone.eprints-hosting.org/id/eprint/120006
Identification Number/DOI	10.1021/acs.macromol.4c02775
Refereed	Yes
Divisions	Interdisciplinary centres and themes > Chemical Analysis Facility (CAF) Life Sciences > School of Chemistry, Food and Pharmacy > Department of Chemistry
Publisher	American Chemical Society
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