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- W3118595220 abstract "We designed and synthesized a colorless transparent glassy polyurethane assembled using low-molecular-weight oligomers carrying a large number of loosely packed weak hydrogen bonds (H-bonds), which has a glass transition temperature (Tg) up to 36.8 °C and behaves unprecedentedly robust stiffness with a tensile Young's modulus of 1.56±0.03 GPa. Fast room-temperature self-healing was observed in this polymer network: the broken glassy polyurethane (GPU) specimen can recover to a tensile strength up 7.74±0.76 MPa after healing for as little as 10 min, which is prominent compared to reported room-temperature self-healing polymers. The high density of loose-packed hydrogen bonds can reversibly dissociate/associate below Tg of GPU (that is secondary relaxation), which enables the reconfiguration of the damaged network in the fractured interfaces, despite the extremely slow diffusion dynamics of molecular chains under room temperature. This GPU shows potential application as an optical lens." @default.
- W3118595220 created "2021-01-18" @default.
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- W3118595220 date "2021-03-08" @default.
- W3118595220 modified "2023-10-11" @default.
- W3118595220 title "A Fast Room‐Temperature Self‐Healing Glassy Polyurethane" @default.
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- W3118595220 doi "https://doi.org/10.1002/anie.202017303" @default.
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