fig7

Figure 7. (A) The different crosslinked network structure determines the strain recovery property and foldability. The CSN network is suitable for flexible adhesives because it incorporates both covalent crosslinked network and movable crosslinked network, allowing controlled movement of the polymer^[87]. Reproduced with permission. Copyright © 2022 Elsevier B.V.; (B) The PEG contained urethane acrylate linker shows superior strain recovery rate compared with commercial linker^[2]. Reproduced with permission. Copyright © 2023 Wiley‐VCH GmbH; (C) The hyperelastic adhesive prevents wrinkles after deformation. Viscoelastic materials on the surface and hyperelastic materials in the bulk created a heterogeneous network^[140]. Reproduced with permission. Copyright © 2022 American Chemical Society; (D) The cross-linked network is formed by photo iCVD method. The frequency sweep test and the dynamic temperature sweep test exhibit network formation of polymer indicating plateau region and rubbery region^[141]. Reproduced with permission. Copyright © 2018 American Chemical Society; (E) The crosslinking density of adhesive could be controlled by manipulating UV intensity through grayscale mask^[144]. Reproduced with permission. Copyright © 2021 Elsevier B.V.; (F) The schematic depicts the bicontinuous phase of a heterogeneous adhesive induced by polymerization-induced microphase separation^[145]. Reproduced with permission. Copyright © 2024 Wiley‐VCH GmbH. CSN: Confined sliding network; PEG: poly(ethylene glycol); iCVD: initiated chemical vapor deposition; UV: ultraviolet.