This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
A Microscopic Study by Dynamic Light Scattering of Four Viscosity Index Improvers in Two Model Solvents and a Mineral Base Oil
Annotation ability available
Sector:
Language:
English
Abstract
Four polymeric viscosity index improvers [PAMA: poly(n-alkyl methacrylate), EP: (ethylene-propylene) copolymer, HPI: hydrogenated poly(isoprene) polymer and SHB: (styrene-hydrogenated butadiene) copolymer], are studied in cyclohexane, n-heptane and a mineral base oil (130 NS). The hydrodynamic diameter of isolated and aggregated polymers is measured by Dynamic Light Scattering technique.
The sample concentrations were always below C* which is the concentration of first overlap separating the dilute regime from the semi-dilute regime. Experiments were run from 20 to 90°C.
Our results show that, depending on the chemical nature of the polymer, the solvent and the temperature value, the solute particles are either aggregated (micelles or not) or isolated.
Recommended Content
Authors
Citation
Bezot, P., Hesse-Bezot, C., Constans, B., Faure, D. et al., "A Microscopic Study by Dynamic Light Scattering of Four Viscosity Index Improvers in Two Model Solvents and a Mineral Base Oil," SAE Technical Paper 932835, 1993, https://doi.org/10.4271/932835.Also In
Tribological Insights and Performance Characteristics of Modern Engine Lubricants
Number: SP-0996; Published: 1993-10-01
Number: SP-0996; Published: 1993-10-01
References
- Briant J. Denis J. Parc G. Propriétés Rhéologiques des Lubrifiants Technip Paris 1985
- Maderek E. Wolf B.A. Angew. Makromol. Chem. 161 157 1988
- Schulz D.N. Glass J.E. Polymers as Rheology Modifiers American Chem. Soc. Washington 1991
- Candau F. Heatley F. Price C. Stubbersfield R. Euro. Pol. J. 20 685 1984
- Bandrup J. Immergut E.H. Polymer handbook 3rd Wileys New York 1989
- Flory P.J. Principles of Polymer Chemistry Cornell Univ. Press Ithaca 1953
- Berne B.J. Pecora R. Dynamic Light Scattering Wiley New York 1976
- Stock R.S. Ray W.H. J. Polym. Sci., Polym. Phys. ed. 23 1393 1985
- Kerker M. Scattering of Light Academic Press New York 1969
- Tsunashima Y. Hirata M. Kawamata Y. Macromolecules 23 1089 1990
- Yeung A.S. Frank C.W. Polymer 31 2089 1990
- Quintana J.R. Villacampa M. Munoz M. Andrio A. Katime L.A. Macromolecules 25 3125 1992 Quintana J.R. Villacampa M. Munoz M. Andrio A. Katime L.A. Macromolecules 25 3129 1992