The Effect of Air Void on the Laboratory Properties of Polyurethane Mixtures

Coatings, Journal Year: 2025, Volume and Issue: 15(2), P. 228 - 228

Published: Feb. 14, 2025

Polyurethane (PU) materials, with their excellent mechanical properties, durability, and fatigue resistance, hold promise for addressing the challenges of aging, environmental pollution, segregation during storage modified asphalt mixtures, thereby extending lifespan pavements enhancing level service. Although studies have been conducted on road performance PU mixtures that compared them there is relatively less research how air void affects performance. This study systematically investigates dynamic characteristics dense-graded at three ranges—1%–3%, 3%–5%, 5%–7%—and verifies effectiveness through statistical methods. The results show voids a significant impact Compared to low voids, high can increase high-temperature by 12%–33%. However, higher also lead decrease in resistance water damage, reduction about 9%–24%. When range mixture has better stability. Therefore, when designing reasonable should be selected based engineering conditions achieve optimal pavement structure combination save investment. provides scientific basis design application lays foundation further understanding mechanisms.

Language: Английский

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Direct Ink-Writable Tough polyurethane acrylate elastomers for underwater intelligent monitoring Equipment

Chemical Engineering Journal, Journal Year: 2025, Volume and Issue: unknown, P. 161448 - 161448

Published: March 1, 2025

Language: Английский

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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

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Bio-inspired MXene/graphene oxide-based nanocomposites with enhanced interfacial self-healing effects and multifunctional integration

Chemical Engineering Journal, Journal Year: 2025, Volume and Issue: unknown, P. 162857 - 162857

Published: April 1, 2025

Language: Английский

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Raw materials, preparation methods, flame retardant properties and applications of bio-based flame retardant polyurethanes: Research progress and challenges

European Polymer Journal, Journal Year: 2025, Volume and Issue: 232, P. 113965 - 113965

Published: April 25, 2025

Language: Английский

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Dynamic Non‐Covalent Interactions Incorporated Reprocessable Waterborne Polyurethane with Visible Light Activated Self‐Healing, Antibacterial, Anti‐Fouling, and Strain Sensor Performances

Advanced Functional Materials, Journal Year: 2025, Volume and Issue: unknown

Published: May 12, 2025

Abstract Multifunctional waterborne polyurethane (WPU) materials with superior mechanical properties, self‐healing capabilities, and reproducibility have attracted significant attention in recent years. In this study, a series of WPU incorporating dynamic covalent aromatic Schiff base (ASB) bonds, carbohydrazide (CHZ), polyhexamethylene guanidine (PHMG) moieties is successfully prepared. The ASB units visible light‐triggered exchange functionality are introduced into the soft polyethylene glycol (PEG) segment to realize high chain flexibility facilitate achieving rapid repair rate during process. By optimizing soft‐to‐hard ratio multiple hydrogen bonds adjusted balance between capability strength, resulting exhibited outstanding light‐assisted performances, which could be maintained extreme circumstances. Additionally, remarkable antibacterial, biocompatible, anti‐fouling, self‐cleaning, reusability properties endow these an excellent candidate directly applied contact human skin. After ionic liquids (ILs) doping, skin property, conductivity, sensitivity, stability can obtained utilized as strain sensor monitor movement joints. This proof‐of‐concept study not only promotes performance but also provides promising for next‐generation intelligent coatings skin, offering versatile platform multifunctional material design sustainable applications.

Language: Английский

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Asymmetric dynamic strategy for high-strength self-healing polyurethane and its superhydrophobic composite materials

Progress in Organic Coatings, Journal Year: 2024, Volume and Issue: 198, P. 108930 - 108930

Published: Nov. 18, 2024

Language: Английский

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