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Transparency‐tunable and moderate‐temperature healable thermoplastic polyurethane elastomer based on bisphenol A chain‐extender
Author(s) -
Xiang Chuanxi,
Chen Hongxiang,
Wang Wanwan,
Dai Qiaoli,
Liu Zhiqiang,
Yang Bing,
Zhou Yu,
Zhou Yang
Publication year - 2021
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.49794
Subject(s) - polyurethane , materials science , thermoplastic polyurethane , elastomer , self healing , prepolymer , transparency (behavior) , composite material , thermoplastic elastomer , isocyanate , polymer , extender , polymer chemistry , copolymer , computer science , medicine , alternative medicine , pathology , computer security
Transparent self‐healing polymers have a promising future, but the research on the relationship among transparency, self‐healing, and structure is still challenging. The thermoplastic polyurethane elastomers containing aryl carbamate were prepared by the reaction of isocyanate‐terminated prepolymer and chain‐extender bisphenol A (BPA). On the one hand, the thermoplastic polyurethane elastomer could heal at a relatively low temperature due to the exchange of aryl carbamate, and exhibits 83% of healing efficiency at 90°C for 2 h. On the other hand, two methyl groups of BPA hinder the crystallization of hard segments in polyurethane, so the domain of hard segments is amorphous, while the microcrystals of soft segments dispersed in the polyurethane are affected by the content of hard segments, therefore, the transparency of polyurethane can be tailored by the content of hard segments. It provides a simple design and a feasible preparation method for transparent self‐healing polymer.