On December 5, 2020, Yang, Ziyue; Sun, Dongcheng published an article.Recommanded Product: 517-23-7 The title of the article was Self-healing supramolecular waterborne polyurethane dispersions with quadruple hydrogen bonds in main chain. And the article contained the following:
A facile method for preparing supramol. waterborne polyurethane (WPU) based on quadruple hydrogen bonds (4H-WPU) is reported. Herein, 4H-WPU with quadruple hydrogen bonds in main chain were synthesized by poly (1,4-butylene-neopentylene adipate glycol) as soft segment, 2-ureido-4[1H]-pyrimidinone (UPy) functionalized monomer, isophorone diisocyanate, 2,2-Bis(hydroxymethyl)propionic acid (hydrophilic monomer), isophoronediamine, triethylamine (neutralizer), and monoethanolamine (blocking agent) as hard segment. The mol. weight of 4H-WPU was controlled around 18,000 consistently. The properties of 4H-WPU with different content of hydrophilic group, hard segment, and UPy units were characterized and the results could provide the reference for preparing supramol. WPU with high mech. and self-healing performance while maintaining dispersion stability. The tensile strength of 4H-WPU was 10 times of the blank sample. The healing time of scratched 4H-WPU film was inversely proportional to the content of UPy-functionalized monomer and the shortest healing time is 2.5 h at 80°C. Mech. performance of healed films can be restored to more than 90%. The experimental process involved the reaction of 3-Acetyldihydrofuran-2(3H)-one(cas: 517-23-7).Recommanded Product: 517-23-7
The Article related to polyurethane preparation self healing morphol mech property, Chemistry of Synthetic High Polymers: Organic Condensation and Step Polymerization and other aspects.Recommanded Product: 517-23-7
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