Mechanically strong, reprocessable and chemically recyclable furan-based poly(acylhydrazone)s materials with hydrogen-bonding networks

European Polymer Journal, Год журнала: 2024, Номер 221, С. 113584 - 113584

Опубликована: Ноя. 15, 2024

Язык: Английский

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Constructing Strong and Tough Polymer Elastomers via Photoreversible Coumarin Dimer Mechanophores

ACS Applied Materials & Interfaces, Год журнала: 2024, Номер 17(1), С. 2339 - 2348

Опубликована: Дек. 26, 2024

Advanced elastomers with outstanding strength, toughness, and reusability hold significant potential for diverse applications. Using photochemistry mechanochemistry to develop such materials has become a very effective strategy. Here, we report that photoreversible coumarin-based mechanophores can make force-/light-triggered cycloreversion are chemically incorporated into polyurethane simultaneously enhance their strength toughness. Coumarin dimer mechanophore cross-linkers formed in the elastomer after exposure 365 nm irradiation, leading networks dramatically enhanced mechanical properties. The tensile of HNA-PU2000 coumarin could increase from 13.9 26.9 MPa, elongation at break 726 1053%, toughness 25.6 119.7 MJ·m–3, contrast its counterpart without mechanophores. Additionally, exhibits decent reusable capability via under stress or 254 irradiation. This mechano-/photochemical strategy improve provides facile approach development high-performance materials.

Язык: Английский

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Construction of epoxy resin with enhanced flame retardancy, mechanical properties, and satisfactory transparency based on a novel bi‐DOPO and hydrogen‐bonding network

Journal of Applied Polymer Science, Год журнала: 2024, Номер unknown

Опубликована: Окт. 28, 2024

Abstract Establishment of high‐performance epoxy resin with satisfactory fire safety, mechanical properties, and excellent transparency is urgently desirable, but still remains significant challenges. Herein, a super‐tough yet high flame retardant (EP/BTD) was designed prepared by incorporating bi‐DOPO structure hydrogen‐bonding networks. Although the phosphorus content only 0.69 wt% (10 [BTD]), EP/BTD‐10 showed limiting oxygen index value (33.4%), UL‐94 rating (V‐0), good heat suppression ability (total release [THR] peak rate [PHRR] reduced to 29.0% 42.2%, respectively). Furthermore, mechanism EP/BTD illustrated attributed dual‐phase fire‐retardant effect. Additionally, EP/BTD‐7.5 featured notably which tensile strength, elongation at break impact strength increased 44.6%, 40.0%, 232.6%, respectively, due network π–π interaction. More importantly, maintained visible light transmittance UV‐blocking properties. In summary, this work provided guidance for development expected expand practical applications.

Язык: Английский

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Complexation-induced mechanically stiff and reprocessable supramolecular polymeric materials with facile surface patterning

Materials Today Chemistry, Год журнала: 2024, Номер 42, С. 102365 - 102365

Опубликована: Окт. 31, 2024

Язык: Английский

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