Traction characteristics of siloxanes with aryl and cyclohexyl branches

Thomas Zolper; Zhi Li; Manfred Jungk; Andreas Stammer; Herbert Stoegbauer; Tobin J Marks; Yip Wah Chung; Qian Wang

doi:10.1007/s11249-012-0066-x

Traction characteristics of siloxanes with aryl and cyclohexyl branches

Thomas Zolper, Zhi Li, Manfred Jungk, Andreas Stammer, Herbert Stoegbauer, Tobin J Marks, Yip Wah Chung, Qian Wang

Northwestern University

Research output: Contribution to journal › Article

14 Citations (Scopus)

Abstract

The molecular structures, rheological properties, and friction coefficients of several new siloxane-based polymers were studied to explore their traction characteristics. The molecular structures including branch content were established by nuclear magnetic resonance spectroscopy, while the molecular mass distributions were determined by gel permeation chromatography. Density, viscosity, elastohydrodynamic film formation, and friction were investigated over a temperature range of 303-398 K. Film thickness and friction measurements were studied under the conditions that are representative of boundary, mixed, and full-film lubrication regimes, aiming at maximizing traction performance and temperature stability by simultaneous optimization of the size and content of ring-shaped branch structures. This study provides quantitative insight into the effect of siloxane molecular structure on the tribological performance for traction drive applications such as continuously variable transmissions.

Original language	English
Pages (from-to)	301-311
Number of pages	11
Journal	Tribology Letters
Volume	49
Issue number	2
DOIs	https://doi.org/10.1007/s11249-012-0066-x
Publication status	Published - Feb 2013

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Keywords

Continuously variable transmissions (CVT)
EHL friction (traction)
Silicones
Synthetic base stocks
Traction fluids

ASJC Scopus subject areas

Mechanical Engineering
Mechanics of Materials
Surfaces, Coatings and Films
Surfaces and Interfaces

Cite this

Zolper, T., Li, Z., Jungk, M., Stammer, A., Stoegbauer, H., Marks, T. J., ... Wang, Q. (2013). Traction characteristics of siloxanes with aryl and cyclohexyl branches. Tribology Letters, 49(2), 301-311. https://doi.org/10.1007/s11249-012-0066-x

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10.1007/s11249-012-0066-x