A high stiffness and self-healable polyurethane based on disulfide bonds and hydrogen bonding

Vitrimers: directing chemical reactivity to control material properties

“…For example, hydrogen bonding has been shown to be benecial in combination with dynamic disulde cross-links. 41 These intermolecular forces can effectively reduce the dynamic exchange based on (very fast) disulde exchange at lower temperatures. Here, the fast covalent exchange is only revealed upon heating to processing temperature as the hydrogen bonding interactions are broken and enable rapid exchange based on disulde metathesis in poly(urea-urethane) networks (Fig.…”

Evolution of self-healing elastomers, from extrinsic to combined intrinsic mechanisms: a review

“…More recently, Liu et al 198 continued exploring different options on PU under this combination of healing mechanisms. They incorporated poly(vinyl alcohol)-graft-(e-caprolactone) (PVA-PCL) into isocyanate terminated PU with disulfide bonds.…”

Mechano-responsive hydrogen-bonding array of thermoplastic polyurethane elastomer captures both strength and self-healing

“…According to the Ashby plot of UTS versus self-healing temperature for recently reported elastomers, previous tensile strengths did not exceed 20 MPa without the aid of light or a temperature above 40 °C ( Supplementary Fig. 7 and Supplementary Table 3) 9, [21][22][23][24][34][35][36][37][38][39][40]42,43,47 .…”

“…1a and Supplementary Fig. 1) [39][40][41][42][43][44] . SS metathesis drives intrinsic self-healing at room temperature 45,46 .…”