Evolution of Morphological, Electrical, Thermal, and Mechanical Properties of Elastomer Nanocomposites With Different Sizes of MWCNTs

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

Published: Jan. 4, 2025

ABSTRACT Ethylene‐propylene‐diene‐monomer (EPDM) nanocomposites with three various types of multiwall carbon nanotubes (MWCNTs) were fabricated to investigate the size effect MWCNTs on morphological, electrical, thermal, mechanical, and viscoelastic properties, as well swelling ratio crosslinking density. enhance properties regardless MWCNT size. The is vital in determining percolation thresholds thermal conductivity; however, it considerably influences electrical conductivity only threshold region (2–10 phr). In addition, diameter a more regulating factor for nanocomposites' than length. EPDM nanocomposites, including longer length, low diameter, higher specific surface area (SSA), show better enhancement (95%) due forming easily thermally conductive networks. negligible key mechanical properties. With increasing contents, decreases, density increases. lower SSA exhibit less all mentioned EPDM‐based worse dispersion matrix.

Language: Английский

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Vulcanization Characteristics and Static/Dynamic Mechanical Properties of Chlorinated Butyl Rubber Matrix Materials

Polymers, Journal Year: 2025, Volume and Issue: 17(6), P. 708 - 708

Published: March 7, 2025

The damping performance of chlorinated butyl rubber (CIIR) is exceptional; however, its poor processability during vulcanization can lead to numerous defects. Natural (NR) and ethylene propylene diene monomer (EPDM) were selected blend with CIIR for improving processing performance. Their effects on the characteristics, mechanical properties, investigated. Blending NR considerably increase speed compound improve production efficiency. tensile strength vulcanizate first increases an in dosage NR/CIIR, subsequently, it decreases before increasing again. then EPDM EPDM/CIIR vulcanizate. by 15.6%when 60 80 phr. have similar CIIR, which evaluated fitting data loss factor (∆tanδ) versus or dosage. Therefore, quantity be conveniently calculated based requirements when designing formula matrix materials.

Language: Английский

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Large‐scale recycling of waste cross‐linked ethylene propylene diene monomer enabled by devulcanization‐grafting strategy

Polymer Engineering and Science, Journal Year: 2025, Volume and Issue: unknown

Published: March 25, 2025

Abstract Rubber exhibits excellent mechanical properties after cross‐linking, which provides a strong foundation for its application across various fields. However, the intricate cross‐linked network structure significantly impairs reprocessing capabilities of rubber materials, thereby posing difficulties their recycling. To overcome this challenge, we utilize twin‐screw extruder devulcanization‐grafting modification waste ethylene propylene diene monomer (EPDM), facilitating large‐scale recycling and processing while simultaneously maximizing performance reclaimed rubber. Under thermal shear, desulfurizing agent zinc diethyl dithiocarbamate (ZDC) reacts with cross‐linking bonds (SS, CS) in rubber, leading to scission chains subsequent opening rubber's network. Simultaneously, graft maleic anhydride (MAH) introduces new functional groups (OH/COOH), can improve performance. Compared devulcanization modified alone, exhibited better tensile modulus, strength (12.02 MPa), tear (29.91 kN/m). Furthermore, recycled was comparable that original By adopting technology, challenges environmental pollution resource caused by accumulation be effectively addressed, providing solution sustainable utilization Highlights Mechanical‐chemical recover large quantities (EPDM). Zinc opens EPDM enable degradation. Maleic during enhances properties. Tensile reaches 100%

Language: Английский

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Effect of filler on mechanical properties, diffusion kinetics, thermal stability, damping and dielectric properties of EPDM-AGNP nanocomposites

Emergent Materials, Journal Year: 2025, Volume and Issue: unknown

Published: April 26, 2025

Language: Английский

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Influence of Flexible Structure Thickness on Methane Explosion Protection in Urban Underground Spaces

Combustion Science and Technology, Journal Year: 2025, Volume and Issue: unknown, P. 1 - 26

Published: May 4, 2025

Language: Английский

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Analyzing the Reinforcement of Multiwalled Carbon Nanotubes in Vulcanized Natural Rubber Nanocomposites Using the Lorenz–Park Method

Applied Sciences, Journal Year: 2024, Volume and Issue: 14(19), P. 8973 - 8973

Published: Oct. 5, 2024

In this study, multiwalled carbon nanotubes (MWCNTs) were incorporated into vulcanized natural rubber (VNR) matrixes to create nanocomposites with improved mechanical, thermal, and electrical properties. The interfacial interaction of the MWCNTs VNR matrix was quantitatively evaluated based on crosslink density value calculated using Flory–Rehner methodology. Various rheometric parameters influenced by addition MWCNTs, including minimum torque (ML), maximum (MH), scorch time (tS1). significantly enhanced vulcanization composites matrix. This study highlights impact density, improving mechanical properties reducing swelling in We discovered that interact strongly, which hardness, tensile strength, abrasion resistance VNR/MWCNT nanocomposites. Based dynamic analysis, MWCNT incorporation stiffness as indicated a change storage modulus glass transition temperatures. their properties, reaching percolation threshold where conductive pathways formed, enhancing overall conductivity. Overall, demonstrates versatility functionality for variety applications, sensors, electromagnetic shielding, antistatic blankets.

Language: Английский

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The Hydrogen Bonding in the Hard Domains of the Siloxane Polyurea Copolymer Elastomers

Polymers, Journal Year: 2024, Volume and Issue: 16(17), P. 2438 - 2438

Published: Aug. 28, 2024

For probing the structure–property relationships of polyurea elastomers, we synthesize siloxane copolymer elastomer by using two aminopropyl-terminated polysiloxane monomers with low and high number-average molecular weight (Mn), i.e., L-30D H-130D. To study influence structures on film properties, these films are analyzed to obtain tensile performance, UV-vis spectra, cross-sectional topographies, glass transition temperature (Tg). The synthetic thermoplastic characterized transparency, ductility, Tg hard domains, depending reacting compositions. Furthermore, elasticity behavior is studied strain recovery cyclic test, then, linear fitting data used describe based Mooney–Rivlin model. Moreover, temperature-dependent infrared (IR) spectra during heating cooling conducted strength rate hydrogen bonding, respectively, their performance further analyzed; calculated Mn segment chains correlated macroscopic bonding. These results can add deep insight copolymer.

Language: Английский

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Influence of pyrolysis temperature on biochar properties: Applications as a reinforcing filler in sbr and epdm elastomeric compounds

Journal of Elastomers & Plastics, Journal Year: 2024, Volume and Issue: 56(8), P. 984 - 1003

Published: Oct. 6, 2024

This study investigates the effect of pyrolysis temperature on properties biochar derived from Pinus spp. wood waste and its application as a reinforcing filler in styrene-butadiene rubber (SBR) ethylene-propylene-diene monomer (EPDM) elastomeric compounds. Biochar was produced at 400°C 900°C effects mechanical elastomers were analyzed. The results indicate that has higher fixed carbon content lower volatile matter, resulting improved such tensile strength elongation break compared to 400°C. Despite specific surface area, irregular structure enhances interaction with elastomers, providing semi-reinforcement. highlights potential high-temperature sustainable alternative conventional fillers black, contributing development environmentally friendly materials biomass waste. support further exploration role elastomer applications, highlighting environmental benefits.

Language: Английский

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