Rheological modification of base oils using a styrene-isoprene copolymer

Autor:	N. C. Joshi, N. M. Desai
Rok vydání:	1998
Předmět:	chemistry.chemical_classification Materials science Thermodynamics Polymer Atmospheric temperature range Surfaces Coatings and Films Shear rate Viscosity chemistry.chemical_compound chemistry Rheology Materials Chemistry Copolymer Newtonian fluid Organic chemistry Isoprene
Zdroj:	Lubrication Science. 11:63-72
ISSN:	1557-6833 0954-0075
DOI:	10.1002/ls.3010110107
Popis:	In trying to understand the behaviour of solutions of polymer in mineral oils, a styrene-isoprene copolymer and two mineral oils have been studied. The base oils showed Newtonian behaviour, and the polymer solution non-Newtonian behaviour, in the temperature range 50–100°C. The variation of viscosity with shear rate can be approximated to a power law model within the same temperature range and 0–104 s−1 shear rate. The free energy of activation is used to explain the flow behaviour qualitatively.
Databáze:	OpenAIRE
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