Characterization of engine motor oils dispersants of the polybutenylsuccinimide type by saponification, methylation and size exclusion chromatography

Characterization of the molecular weight distribution (MWD) of the starting polybutene (PBU) used in the synthesis of dispersants of the polybutenylsuccinimide type used in lubricants can be achieved through size exclusion chromatography after a preliminary chemical treatment consisting of saponific...

Full description

Saved in:
Bibliographic Details
Published in:Analytica chimica acta 1996, Vol.322 (1), p.31-41
Main Authors: Machtalère, G., Xie, J., Hui, F., Kolodziejczyk, H., Rosset, R.
Format: Article
Language:English
Subjects:
Analytical chemistry
Applied sciences
Chemical and thermal methods
Chemistry
Chromatography
Exact sciences and technology
Friction, wear, lubrication
Infrared spectrometry
Lubricating oils
Machine components
Mechanical engineering. Machine design
Motor oils
Polybutenylsuccinimide dispersants
Saponification
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Characterization of the molecular weight distribution (MWD) of the starting polybutene (PBU) used in the synthesis of dispersants of the polybutenylsuccinimide type used in lubricants can be achieved through size exclusion chromatography after a preliminary chemical treatment consisting of saponification followed by acidification and methylation with diazomethane. This treatment can be checked by Fourier transform infrared spectrometry since each compound — the original dispersant, the PBU succinic acid derivative and the corresponding methyl ester — has typical absorption bands. The method was tested with model dispersants synthesized from known starting PBUs and applied to dispersants contained in commercial engine motor oils.
ISSN:0003-2670
1873-4324
DOI:10.1016/0003-2670(95)00570-6