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Tribology Letters
Published in: Tribology Letters 2/2013

01-02-2013 | Original Paper

Traction Characteristics of Siloxanes with Aryl and Cyclohexyl Branches

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

Published in: Tribology Letters | Issue 2/2013

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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.
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Appendix
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Metadata
Title
Traction Characteristics of Siloxanes with Aryl and Cyclohexyl Branches
Authors
Thomas Zolper
Zhi Li
Manfred Jungk
Andreas Stammer
Herbert Stoegbauer
Tobin Marks
Yip-Wah Chung
Qian Wang
Publication date
01-02-2013
Publisher
Springer US
Published in
Tribology Letters / Issue 2/2013
Print ISSN: 1023-8883
Electronic ISSN: 1573-2711
DOI
https://doi.org/10.1007/s11249-012-0066-x

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