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Friction and Wear Characteristics of Silicone-Modified Thermoplastics
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English
Abstract
Self-lubricating plastic bearing materials can be produced by adding a small quantity of silicone fluid directly to the thermoplastic melt. The result is a substantial increase in the critical load-speed (limiting pressure-velocity or LPV) limit of the plastic, above which rapid wear takes place. The magnitude of the improvement in lubricity suggests the possibility of replacing metals with plastics, or replacing expensive plastics with silicone-modified, inexpensive plastics. LPV of some plastics has been raised as much as 1000 percent by the silicone additive, where LPV was measured at high speeds. At low speeds, less improvement is noted, but results are still significant.
Data on the effect of the additive on various thermoplastics will be presented, along with a discussion of the correlation between wear rate and LPV.
The additive also improves the handling properties of plastics, producing better flow, easier release from low-draft molds, and other advantages.
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Citation
Smith, R., "Friction and Wear Characteristics of Silicone-Modified Thermoplastics," SAE Technical Paper 760371, 1976, https://doi.org/10.4271/760371.Also In
References
- Walton Nicholas “Plastic Bearings” Machine Design 1972
- Picour Bertrand Scherer Richard A. “Designing Plastic Bearings” SPE Journal 1972
- Arkles Barry Theberge John “Migratory Internal Lubrication of Thermoplastic Resins” ASLE/ASME Joint Conference Atlanta 1973
- Duncan A. W. Smith R. F. Modern Plastics 1973
- Fearon F. W. G. Smith R. F. “American Chemical Society International Symposium on Advances in Polymer Friction and Wear” Los Angeles 1974