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Self‐healing polyurethane based on disulfide bond and hydrogen bond
Author(s) -
Jian Xiaoxia,
Hu Yiwen,
Zhou Weiliang,
Xiao Leqin
Publication year - 2018
Publication title -
polymers for advanced technologies
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.61
H-Index - 90
eISSN - 1099-1581
pISSN - 1042-7147
DOI - 10.1002/pat.4135
Subject(s) - materials science , polyurethane , covalent bond , self healing , disulfide bond , ultimate tensile strength , hydrogen bond , polymer , composite material , polymer chemistry , chemical engineering , organic chemistry , molecule , chemistry , medicine , biochemistry , alternative medicine , pathology , engineering
Tough and transparent polyurethane networks with self‐healing capability at mild temperature conditions were successfully prepared in a 1‐pot procedure. The self‐healing ability of synthesized polyurethane comes from the covalent disulfide metathesis and non‐covalent H‐bonding. The mechanical testing indicates that disulfide metathesis reforms the covalent bonds on a longer time scale, while H‐bonding gives rise to a healing efficiency of around 46% in the early healing processing. The compromise between mechanical performance and healing capability is reached by tailoring the concentration of disulfide. The tensile strength of the sample with 100% self‐heal efficiency can get to 5.01 MPa, which can be explained by higher mobility of polymer chain under ambient temperature from creep testing.