Fatty-acid based comb copolyesters as Viscosity Index Improvers in Lubricants - Archive ouverte HAL
Article Dans Une Revue European Polymer Journal Année : 2022

Fatty-acid based comb copolyesters as Viscosity Index Improvers in Lubricants

Résumé

Methyl ricinoleate was functionalized using thiol-ene click chemistry in order to synthesize bio-based comb (co)poly(9-alkyl 12-hydroxystearate)s. The latter were then evaluated as Viscosity Index Improvers in a mineral based lubricant. While most of the poly(9-alkyl 12-hydroxystearate)s investigated behave as thickeners, copolyesters containing 15 to 25 wt. % of methyl 9-phenyl ethyl 12-hydroxystearate exhibit a Viscosity Index improver effect, interpreted to a limited solubility of these copolyesters. The effect of these polyesters on the oil viscosity-temperature (V-T) behavior was investigated in the dilute regime of n-dodecane used as a model solvent. An aggregation-disaggregation behavior was assumed to explain the V-T behavior observed with these (co)polyesters.
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hal-03840401 , version 1 (05-11-2022)

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Hélène Méheust, Jean-François Le Meins, Annie Brûlet, Olivier Sandre, Etienne Grau, et al.. Fatty-acid based comb copolyesters as Viscosity Index Improvers in Lubricants. European Polymer Journal, 2022, 181, pp.111674. ⟨10.1016/j.eurpolymj.2022.111674⟩. ⟨hal-03840401⟩
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