Enhanced Multifunction in Polyurethane Elastomers via Regulation of Triple‐Crosslinked Network With Dynamic Covalent and Noncovalent Bonds

Journal of Applied Polymer Science, Journal Year: 2025, Volume and Issue: unknown

Published: March 12, 2025

ABSTRACT Self‐healing polyurethane elastomers with dynamic crosslinking networks are promising candidates for intelligent next‐generation coatings. However, their constitutive relation shows conflicts between high mechanical performance and room‐temperature self‐healing, as well recyclability. Here, a regulation strategy of triple‐crosslinked network in the hard domain was proposed to achieve multifunction enhancement via covalent borate ester bonds coupling noncovalent. The distribution ratio bonds, boron‐nitrogen coordination multiple hydrogen were meticulously designed balance fracture reconstruction molecular network. introduced enabled basic self‐healing through molecule‐level topological evolution. abundant provided external noncovalent reversible networks, thus improving tensile strength toughness physical points. obtained exhibited impressive light transmittance 93%, 41.07 MPa, elongation at break 1673.20%, 166.74 MJ m −3 , almost entirely 48 h. These even maintained 90% original properties after suffering three recycles. This may promote practical application coatings automobile flexible electronic industry.

Language: Английский

Synthesis of anti-ultraviolet and fluorescent waterborne polyurethanes with highly active plant oil-based internal emulsifiers

Resources Chemicals and Materials, Journal Year: 2025, Volume and Issue: unknown, P. 100114 - 100114

Published: April 1, 2025

Language: Английский