Fluorinated Polyphthalazine Ether Ketone Polymers with Self-Lubricating Function: Experiments and Molecular Dynamics Simulations DOI

Qingguang Bao,

Yulu Li, Ning Wang

et al.

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

Published: Jan. 16, 2025

Traditional polymers have difficulty meeting the requirements of severe friction conditions such as high speed, heavy load, and temperature. Therefore, there is an urgent need to develop new with characteristics temperature resistance, wear self-lubrication. In this paper, a series fluorinated polyphthalazine ether ketone (PFPEK) were synthesized via nucleophilic polycondensation. The structural, thermal, mechanical properties characterized. Additionally, effects fluorine content external on tribological PFPEK investigated. introduction fluorine-containing groups improves performance PPEK. average coefficient (μ) (ω) PFPEK-F5 are 0.421 8.73 × 10–15 m3/Nm, respectively, which 34.22 87.04% lower than those pure Molecular dynamics (MD) simulations employed explore microscopic mechanisms underlying improved properties. A three-layer model comprising polymer Fe atomic layers was developed analyze changes in mechanism at molecular level before after incorporation groups. analysis concentration, temperature, velocity distributions, interface binding energy, radial distribution function (RDF), bond energy during process revealed that reduced polymer–Fe interactions decreased adhesion chains contact surface. Consequently, μ ω reduced. This study provides theoretical insights into chemical modification offers deeper understanding behavior.

Language: Английский

Synthesis and characterization of new polyarylate containing phthalazinone moiety DOI

Zeyuan Liu,

Qian Liu, Peiqi Xu

et al.

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

Published: Jan. 11, 2025

Novel polyarylates containing phthalazinone moieties (PAR-PH) were synthesized and characterized by co-solvent interfacial polymerization based on 4-(4′-hydroxyphenyl)-2,3-phthalazin-1-one (DHPZ) isophthaloyl chloride (IPC). Effects of inorganic bases, monomer concentration, phase transfer catalysts co-solvents the reaction investigated. When organic solvent was cyclohexane with 3% butanone 18-crown-6 catalyst, PAR-PH achieved a maximum intrinsic viscosity ( η int ) up to 0.52 dL/g. For some solvents alkanes chlorinated hydrocarbons, addition increased polymer. exhibit excellent thermal resistance due introduction rigid twisted into polymer main chains, glass transition temperature T g 275°C. The 5% weight loss 463°C in N 2 residual mass ratios at 800°C 52.0%, demonstrating stability.

Language: Английский

Citations

0
Fluorinated Polyphthalazine Ether Ketone Polymers with Self-Lubricating Function: Experiments and Molecular Dynamics Simulations DOI

Qingguang Bao,

Yulu Li, Ning Wang

et al.

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

Published: Jan. 16, 2025

Traditional polymers have difficulty meeting the requirements of severe friction conditions such as high speed, heavy load, and temperature. Therefore, there is an urgent need to develop new with characteristics temperature resistance, wear self-lubrication. In this paper, a series fluorinated polyphthalazine ether ketone (PFPEK) were synthesized via nucleophilic polycondensation. The structural, thermal, mechanical properties characterized. Additionally, effects fluorine content external on tribological PFPEK investigated. introduction fluorine-containing groups improves performance PPEK. average coefficient (μ) (ω) PFPEK-F5 are 0.421 8.73 × 10–15 m3/Nm, respectively, which 34.22 87.04% lower than those pure Molecular dynamics (MD) simulations employed explore microscopic mechanisms underlying improved properties. A three-layer model comprising polymer Fe atomic layers was developed analyze changes in mechanism at molecular level before after incorporation groups. analysis concentration, temperature, velocity distributions, interface binding energy, radial distribution function (RDF), bond energy during process revealed that reduced polymer–Fe interactions decreased adhesion chains contact surface. Consequently, μ ω reduced. This study provides theoretical insights into chemical modification offers deeper understanding behavior.

Language: Английский

Citations

0