Antiwear and lubrication properties of polyurethane/polytetrafluoroethylene‐bonded coating | Zendy

Tian J. | Zendy; Huang Y. L. | Zendy

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Antiwear and lubrication properties of polyurethane/polytetrafluoroethylene‐bonded coating

Author(s) -

Tian J.,

Huang Y. L.

Publication year - 2002

Publication title -

journal of applied polymer science

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.575

H-Index - 166

eISSN - 1097-4628

pISSN - 0021-8995

DOI - 10.1002/app.11380

Subject(s) - polytetrafluoroethylene , materials science , coating , composite material , polyurethane , tribology , curing (chemistry) , lubrication , volume (thermodynamics) , relative humidity , physics , quantum mechanics , thermodynamics

Polytetrafluoroethylene (PTFE) particles were irradiated with 60 Co γ‐ray to improve their dispersing capacity in polyurethane (PU), which was used as a binder of a PTFE‐based bonded solid lubricating coating. The PU/PTFE‐bonded solid lubricating coating was prepared on a steel block by spraying and curing at room ambient, and the tribological properties of the PU/PTFE coatings were evaluated on a ring‐on‐block tester at a speed of 1.25–2.5 m/s and a load of 314–785 N. The wear life of bonded coatings on PTFE volume concentrations, curing humidities and times, coating thickness, and sliding conditions was also investigated. It was found that a 60‐μm thickness coating, which has a 40% PTFE volume concentration, cured at 75% relative humidity for 4 days, has a longer wear life of 844 m/μm at 314 N and 1.25 m/s. The PTFE/PU coating was wear‐resistant when the load × speed value was less than 687 Nm/s −1 ; at same time, the wear life for a thinner coating is sensitive to sliding condition variations. © 2002 Wiley Periodicals, Inc. J Appl Polym Sci 86: 3454–3459, 2002

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