Superior Flame Retardancy, Mechanical and Dielectric Properties of Epoxy Resin Composites Based on Molybdenum Disulfide‐Melamine Trimetaphosphate Crystallite Composites

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

Published: Feb. 5, 2025

ABSTRACT To improve the flame retardancy, mechanical and dielectric properties of epoxy resin (EP), promoting application in aeronautic industry other fields, molybdenum disulfide‐melamine trimetaphosphate (MoS 2 ‐MAP) crystallite composites are synthesized. The chemical, crystalline structure thermal stabilities MoS ‐MAPs thoroughly characterized by Fourier transform infrared (FTIR), X‐ray diffraction (XRD), scanning electron microscope (SEM), thermo‐gravimetric analysis (TGA) techniques, respectively. morphologies EP/MoS ‐MAP assessed SEM, stability TGA, fire retardancy limiting oxygen index test (LOI), vertical burning standard (UL‐94), cone calorimeter tests, stress strain impedance analyzer. Compared with pure EP, mechanical, dielectrical properties, can be significantly improved due to good dispersibility MAP matrix. While, further adjusted controlling mass raito crystallite. EP 4 wt% ‐MAP‐50% (P content: 0.30%) shows lowest constant loss values on basis properties. results show that promote aeronautical devices, radar detection fields.

Language: Английский

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Flame-retardant functionalized boron nitride for epoxy resin with excellent flame retardancy and enhanced thermal conductivity

High Performance Polymers, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 11, 2025

A flame-retardant functionalized boron nitride (BN@DT) was prepared through the modification of (BN) by a reaction product (DT) among 9, 10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide (DOPO), 4-aminobenzoic acid, and p-phthalaldehyde, effect BN@DT on flame retardancy, thermal conductivity mechanical properties epoxy resin (EP) investigated. The EP composite with 15 wt% (EP/15BN@DT) achieves UL-94 V-0 rating limiting oxygen index 40%. peak heat release rate, total smoke production EP/15BN@DT are reduced 36.3%, 31.9% 38.9%, respectively compared ones pure EP. increases 148% in comparison that Moreover, tensile impact strengths higher than containing unmodified BN. This work provides promising method for preparation thermally conductive composites excellent retardancy.

Language: Английский

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Siloxane‐Mediated Schiff Base Bio‐Based Curing Agent: Achieving Epoxy Vitrimer with Excellent Mechanical Properties, Low Dielectric Constant and Rapid Degradation Characteristics

Macromolecular Rapid Communications, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 20, 2025

Abstract Epoxy resin is indispensable in various applications due to its outstanding properties. However, limited recyclability and associated environmental issues pose significant challenges for sustainable development. To address this issue, integrating recyclable Schiff base groups into epoxy systems construct vitrimer with dynamic properties has become a promising strategy. Herein, rapid degradation, enhanced mechanical properties, low dielectric constant (EP‐BOB) proposed through unique rigid‐flexible structure bio‐based curing agent (BOB). BOB synthesized using siloxane as flexible chain bridge vanillin one‐pot process. The incorporation of the imparted exceptional degradability EP‐BOB, allowing it fully degrade within 45 min. In addition, structure, EP‐BOB exhibited lower (1.2–2.6) (60.5 MPa tensile strength). Furthermore, Raman spectroscopy scanning electron microscopy shows that can be completely degraded amine solution recycle carbon fibers (CFs) without damage. Especially, endow UV‐shielding antibacterial This work opens up new strategy designing silicone achieve multifunctional high‐performance EP.

Language: Английский

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A P/N/S- containing organophosphonate for the facile synthesis and endowing epoxy resin with excellent flame retardance and mechanical properties

Materials Today Communications, Journal Year: 2025, Volume and Issue: unknown, P. 112142 - 112142

Published: March 1, 2025

Language: Английский

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Facile Synthesis of a Bio‐Based Macromolecule Endowing Epoxy Resin With Charming Flame‐Retardant, Transparent, and Ultraviolet Shielding Properties

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

Published: March 10, 2025

ABSTRACT Developing epoxy resin (EP) with satisfactory comprehensive properties has significant prospects in high‐tech industries, but achieving this goal remains a challenge. In work, macromolecular flame retardant (PSi) was synthesized using vanillin, phenylphosphonic dichloride (PPDC), 9,10‐dihydro‐9‐oxa‐10‐phospha‐phenanthrene 10‐oxide (DOPO), and 1,3‐bis(aminopropyl)tetramethyldisiloxane (DAPTMS). PSi subsequently utilized to fabricate high‐performance EP. The EP 2 wt% (i.e., EP/PSi ) exhibits flame‐retardant performance. It achieves V‐0 rating the Underwriters Laboratories‐94 (UL‐94) test limiting oxygen index (LOI) of 29.2%. peak heat release rate (PHRR) total (THR) decreased by ~14.7% ~9.6%, respectively. Compared unmodified EP, tensile strength impact increase ~9.0% ~67.5%, respectively, while maintaining high glass transition temperature ( T g ). Moreover, incorporation significantly enhances UV‐shielding without sacrificing its transparency. This work provides an integrated strategy for developing efficient vanillin‐based retardant. fabricated mechanical robustness, transparency, broad industrial applications.

Language: Английский

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