Functional Heteroatom Substituted Hyperbranched Polymers: Recent Developments and Perspectives

ACS Applied Materials & Interfaces, Journal Year: 2025, Volume and Issue: 17(9), P. 13324 - 13341

Published: Feb. 20, 2025

Heteroatom-substituted hyperbranched polymers (HBPs) have emerged as a versatile class of functional materials, combining the structural merits architectures with unique chemical functionalities imparted by heteroatoms such boron, silicon, phosphorus, sulfur, selenium, and tellurium. These exhibit distinct physicochemical properties, including low viscosity, excellent solubility, high reactivity, tunable functionality, which position them promising candidates for diverse applications. This Review highlights recent advances in heteroatom substituted HBPs, categorizing from element group their (from Group III to VI, well transition rare-earth metals). The pivotal role modulating polymer properties is explored, key applications highlighted across four principal domains: fluorescent flame retardants, stimuli-responsive polymers, modifications. By integrating insights chemistry, materials science, interdisciplinary research, this underscores potential heteroatom-substituted HBPs addressing current material challenges.

Language: Английский

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Encapsulated Water Imparts Unprecedented Flame Retardancy to Cross-Linked Polystyrene Foams

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

Published: Feb. 3, 2025

Water is an optimal flame retardant owing to high vaporization and specific heat, greenness low-cost. The challenge, however, lies in how integrate water into the matrix materials, ensure its retention. To address we developed cross-linked polystyrene foams (cPSs) that contain within closed pores. These composite cPSs achieved a retardancy rating above V-0 UL-94 test when volume fraction ablation layer exceeded 33%. Notably, representative composite, cPSs-M2, demonstrated significant improvements: peak heat release rate (PHRR) total (THR) were reduced by 55.4 31.1%, respectively. Additionally, time ignition (TTI) performance index (FPI) increased over 10 25 times, evaporation further significantly delayed flame-retardant coating salts incorporation. estimated service life of surface-coated projected exceed eight years.

Language: Английский

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Hyperbranched Polyborophosphate towards Transparent Epoxy Resin with Ultrahigh Toughness and Fire Safety

Small, Journal Year: 2025, Volume and Issue: unknown

Published: April 26, 2025

Abstract Inherent transparency makes epoxy resins ideal for aircraft windows, yet their brittleness and flammability remain challenges. Existing strategies these issues often compromise transparency, with limited research on the mechanisms involved. Herein, a novel strategy is proposed fabricating transparent resin by tuning electrostatic potential distribution via hyperbranched polyborophosphate. Electron‐deficient boron relatively electron‐rich phosphorus atoms work synergistically to increase highest occupied molecular orbital‐lowest unoccupied orbital (HOMO‐LUMO) energy gap, preventing visible light absorption. Meanwhile, structure facilitates polymer network interpenetration reduce porosity decreased scattering. This synergy results in nearly colorless material over 80% transmittance at 550 nm even 4 mm thickness, along full‐band UV shielding. Notably, demonstrates 114.7% impact toughness (45.2 kJ m −2 ) due dual dynamic B─O P─O linkages. Besides, it yields limiting oxygen index of 33% V0 rating underwriter laboratories vertical burning test, significant reductions heat, smoke, toxic gas release. The outstanding performance stand out compared reported advanced resins, highlighting significance this work.

Language: Английский

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Reactive Phosphonitrile-Crosslinked EPDM Insulation Layer with Enhanced Ablation Resistance via Carbon Crystal of the Condensed-Phase Structure at Elevated Temperatures

Polymer Degradation and Stability, Journal Year: 2025, Volume and Issue: unknown, P. 111427 - 111427

Published: May 1, 2025

Language: Английский

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Epoxy resins containing sulfhydryl hyperbranched polysiloxane with desirable mechanical properties and lower curing temperature

Polymer, Journal Year: 2024, Volume and Issue: unknown, P. 127859 - 127859

Published: Nov. 1, 2024

Language: Английский

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Dual-excitation and single-emission B, N-codoped carbon dots: Synthesis, fluorescent properties and multi-ion detection

Journal of Photochemistry and Photobiology A Chemistry, Journal Year: 2024, Volume and Issue: 462, P. 116180 - 116180

Published: Dec. 1, 2024

Language: Английский

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