Multirecyclable, Self-Healable, Chemically Degradable, and High-Strength Epoxy Vitrimers Containing Tailorable Imine Bonds

Industrial & Engineering Chemistry Research, Journal Year: 2025, Volume and Issue: 64(9), P. 4685 - 4693

Published: Feb. 20, 2025

Epoxy (EP) vitrimers are considered the ideal substitutions for conventional thermosetting EPs due to their sustainability. However, industrial applications, high strength of usually contradicts a recovery ratio. Herein, we synthesized series hardeners containing imine bonds via reaction Schiff base between p-phenylenediamine and vanillin, which were then used prepare EP with various bond contents according stoichiometric ratios. exhibited tensile at least 54.9 MPa, all can be self-healed reprocessed temperatures. Moreover, increase content, activation energy (Ea) topology freezing transition temperature (Tv) decreased, leading improved The optimal comprehensive properties vitrimer achieved EPV-VP-1.5, Tg 132.7 °C, 82.4 an elongation break 5.5%, ratio 91.5% in first recycling process. Even after three times, 62.8 MPa was retained. dissolved completely 0.5 mol L–1 HCl DMF solutions 50 °C 2 days. Therefore, this work demonstrated strategy both

Language: Английский

Constructing Fully Biobased Epoxy Vitrimer Based on Disulfide Bonds with Desired Mechanical, Recyclability, and Degradability Properties

ACS Applied Polymer Materials, Journal Year: 2025, Volume and Issue: unknown

Published: March 14, 2025

Language: Английский

Development of Reprocessable Structural Adhesives Based on Covalent Adaptable Networks for Wind Turbine Blade

Composites Part B Engineering, Journal Year: 2025, Volume and Issue: unknown, P. 112519 - 112519

Published: April 1, 2025

Language: Английский