MÉHEUST, Hélène; LE MEINS, Jean-Francois; GRAU, Etienne; CRAMAIL, Henri

doi:10.1021/acsapm.0c01153

MÉHEUST, Hélène
Laboratoire de Chimie des Polymères Organiques [LCPO]
Team 2 LCPO : Biopolymers & Bio-sourced Polymers

LE MEINS, Jean-Francois

Laboratoire de Chimie des Polymères Organiques [LCPO]
Team 3 LCPO : Polymer Self-Assembly & Life Sciences

GRAU, Etienne

Laboratoire de Chimie des Polymères Organiques [LCPO]
Team 2 LCPO : Biopolymers & Bio-sourced Polymers

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ACS Applied Polymer Materials. 2021-01-04, vol. 3

Resumen en inglés

This paper aims to design bio-based polyester as a viscosity modifier for lubricant properties. Bio-based polyricinoleate (PRic) and its saturated homologous polyhydroxystearate (PHS) have been synthesized from fatty acid methyl esters. The polycondensation performed in bulk in a one-step reaction without any purification leads to two series of polyesters within a large range of molecular weights, with Mw between 3 and 130 kg·mol–1. Their thermal properties were investigated. Good thermal stability was observed with degradation temperatures above 300 °C. As expected, PRic appeared to be amorphous with a particularly low glass-transition temperature, while PHS is semicrystalline. A rheological study determined that polyricinoleate entangled when its molecular weight was above 25 kg·mol–1. These two bio-based and biodegradable polymers were then evaluated as viscosity modifiers in both organic and mineral oils. PHS with high molecular weights appeared to be an excellent thickener as well as a good viscosity index improver with a viscosity index (VI) increase above +50 in organic lubricant oil and +64 in mineral oil.< Leer menos

Palabras clave en inglés

polyricinoleate

polyhydroxystearate

lubricant

viscosity modifiers

thickeners

viscosity index

URI

https://oskar-bordeaux.fr/handle/20.500.12278/25769

DOI

http://dx.doi.org/10.1021/acsapm.0c01153

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Laboratoire de Chimie des Polymères Organiques (LCPO) - UMR 5629

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Bio-Based Polyricinoleate and Polyhydroxystearate: Properties and Evaluation as Viscosity Modifiers for Lubricants

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Resumen en inglés

Palabras clave en inglés

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Centros de investigación