Xie, Haopu published the artcileNovel titin-inspired high-performance polyurethanes with self-healing and recyclable capacities based on dual dynamic network, Category: esters-buliding-blocks, the publication is Polymer (2021), 124096, database is CAplus.
It is still a huge challenge that integrating excellent mech. performance and high healing efficiency into self-healing materials at the same time, even if numerous dynamic bonds have been explored in preparing of self-healing materials in the last 20 years. Herein, we reported a novel titin-inspired strategy to prepare the polyurethanes via introducing dual dynamic network which contained the phys. crosslinking of quadruple hydrogen bonds formed by 5-(2-hydroxyethyl)-6-methyl-2-aminouracil (UPy) dimers and the covalent crosslinking of Diels-Alder (D-A) bonds. Specially, relying on the synergistic effect of the dual dynamic network, the resulting polyurethane F50U50-PU exhibited admirable mech. performance, such as a super-high strength of 51.9 MPa, a superb toughness of 166.7 MJ/m3 and a large elongation at break of 930%. Meanwhile, on account of the dynamic feature of quadruple hydrogen bonds and D-A bonds, the resulting polyurethane showed a high heat-induced healing efficiency of 91.2%. More importantly, the polyurethanes could be recycled by hot-pressing process to regain their initial mech. properties and integrity. And it was also used as substrate to construct self-healing conductive device, which displayed splendid self-healing of elec. conductivity after damage. It can be envisioned that the polyurethanes with both superior mech. performance and high healing efficiencies have great application prospect in multifarious fields.
Polymer published new progress about 517-23-7. 517-23-7 belongs to esters-buliding-blocks, auxiliary class Tetrahydrofuran,Ketone,Ester, name is 3-Acetyldihydrofuran-2(3H)-one, and the molecular formula is C15H21BO3, Category: esters-buliding-blocks.
Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics