Yao, Yuan published the artcileMultiple H-Bonding Chain Extender-Based Ultrastiff Thermoplastic Polyurethanes with Autonomous Self-Healability, Solvent-Free Adhesiveness, and AIE Fluorescence, Recommanded Product: N-(2-Amino-2-oxoethyl)acrylamide, the publication is Advanced Functional Materials (2021), 31(4), 2006944, database is CAplus.
Developing an autonomous room temperature self-healing supramol. polyurethane (PU) with toughness and stiffness remains a great challenge. Herein, a novel concept that utilizes a T-shaped chain extender with double amide hydrogen bonds in a side chain to extend PU prepolymers to construct highly stiff and tough supramol. PU with integrated functions is reported. Mobile side-chain H-bonds afford a large flexibility to modulate the stiffness of the PUs ranging from highly stiff and tough elastomer (105.87 MPa Young’s modulus, 27 kJ m-2 tearing energy), to solvent-free hot-melt adhesive, and coating. The dynamic side-chain multiple H-bonds afford an autonomous self-healability at room temperature (25°C). Due to the rapid reconstruction of hydrogen bonds, this PU adhesive demonstrates a high adhesion strength, fast curing, reusability, long-term adhesion, and excellent low-temperature resistance. Intriguingly, the PU emits intrinsic blue fluorescence presumably owing to the aggregation-induced emission of tertiary amine domains induced by side-chain H-bonds. The PU is explored as a counterfeit ink coated on the predesigned pattern, which is visible-light invisible and UV-light visible. This work represents a universal and facile approach to fabricate supertough supramol. PU with tailorable functions by chain extension of PU prepolymers with multiple H-bonding chain extenders.
Advanced Functional Materials published new progress about 2479-62-1. 2479-62-1 belongs to amides-buliding-blocks, auxiliary class Monomers,Acrylamide Monomers, name is N-(2-Amino-2-oxoethyl)acrylamide, and the molecular formula is C18H28B2O4, Recommanded Product: N-(2-Amino-2-oxoethyl)acrylamide.
Referemce:
https://en.wikipedia.org/wiki/Amide,
Amide – an overview | ScienceDirect Topics