A fluoride degradable crosslinker for debond-on-demand polyurethane based crosslinked adhesives

The requirement to consider the whole lifecycle of products including disassembly and recycling has resulted in considerable interest debond-on-demand adhesives. These smart materials undergo controlled loss adhesive strength when subject a specific stimulus. This paper reports design crosslinked polyurethane (PU) which incorporates fluoride responsive degradable group. PU (CLP) showed 28 % increase bonding strengths by lap shear testing (14.6 MPa) compared structurally analogous linear (LPU) (11.4 MPa). After 3 h contact with ions, CLP exhibited 55 (from 14.6 MPa 6.7 as consequence selective degradation covalent bonds at crosslinking sites. work introduces new route dismantle components adhered widely used adhesives, facilitating recovery valuable materials, dramatically reducing waste.