Poly(alpha-olefins)

Rudnick, Leslie R.; Shubkin, Ronald L.

doi:10.1201/9780203909898.ch1

Cited by 24 publications

(25 citation statements)

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“…Polyalphaolefins (PAOs) are branched, acyclic synthetic alkanes with defined molecular weights, which have found wide applications, for example, in transmission fluids, gear, engine and hydraulic oils as well as greases . This is mainly due to their outstanding chemical and physical properties such as high viscosity indices, good thermal and oxidative stability and low toxicity .…”

Section: Introductionmentioning

confidence: 99%

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Detailed characterisation of isomers present in polyalphaolefin dimer and the effect of isomeric distribution on bulk properties

Scheuermann¹,

Eibl²,

Bartl³

2011

Lubrication Science

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This study has been conducted with the aim to gain detailed insight into the chemical nature of polyalphaolefin dimer (PAO dimer, C 20 H 42 ). By using gas chromatography/mass spectrometry, a large number of isomers the complex mixture consists of has been identified; the variety of structural motifs ranges from a homologous series of almost linear vicinal dimethyloctadecanes to highly branched isomers such as 6,7-dibutyldodecane. However, the mixture is characterised by the presence of isomers, which exhibit an intermediate degree of branching. Furthermore, a generally applicable protocol has been established to determine the relative content of these isomers. This protocol has then been applied to analyse samples from different PAO dimer batches, and a correlation between isomeric distribution and bulk properties, namely the viscosity-temperature behaviour, has been found. It turns out that the viscosity of PAO dimer depends less on temperature if the amount of weakly branched and almost linear isomers increases.

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Section: Introductionmentioning

confidence: 99%

“…To manufacture PAOs, linear alphaolefins (primarily 1‐decene) are oligomerised cationically by using, for example, catalytic systems of BF 3 complexes with proton donors such as water, alcohols, acids and alike . After oligomerisation, the resulting unsaturated decene dimers, trimers, etc.…”

Section: Introductionmentioning

confidence: 99%

Detailed characterisation of isomers present in polyalphaolefin dimer and the effect of isomeric distribution on bulk properties

Scheuermann¹,

Eibl²,

Bartl³

2011

Lubrication Science

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“…The Technical Association of the European Lubricants Industry, ATIEL, has established a Group VI category for polyinternalolefins (PIO). These are mixtures of linear and cyclic olefin isomers (83,84).…”

Section: Polyalphaolefins Group IV Base Stocks Are Poly(a-olefins) (mentioning

confidence: 99%

Lubrication and Lubricants

Gresham

Canter²,

Zabawski³

et al. 2015

Kirk-Othmer Encyclopedia of Chemical Technology

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Lubrication is a process in which a lubricant is placed between rubbing surfaces to control friction and reduce wear. This article outlines the nature of the frictional force, the wear process, the role of surface characteristics, and the mechanisms of lubrication. The manufacture and classification of lubricating oil base stocks, including refined petroleum stocks, chemical base stocks, stocks synthesized from other chemicals, and vegetable oils, are covered. The composition and function of lube oil additives are described for enhancing oxidation stability, corrosion resistance, wear reduction, friction modifying, viscosity–temperature characteristics, and other important performance characteristics. The performance characteristics of lubricating oils for selected applications are discussed, including automotive engine oils, diesel engine oils, automatic transmission fluids, automotive gear oils, jet engine lubes, and industrial turbine oils. Metalworking fluids, lubricating grease, solid‐film lubricants, and lubrication in extreme environments are covered, as are the lubricants market and environmental and health concerns.

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“…This can be achieved by blending the mineral base stocks, having lower KV and VI, with synthetic group IV base stocks having superior KV and VI, resulting in a product with properties somewhere in between. A good compilation of the properties and application of PAOs can be found in the review by Rudnick and Shubkin …”

Section: Introductionmentioning

confidence: 99%

Poly‐α‐olefin‐based synthetic lubricants: a short review on various synthetic routes

Ray

Rao

Choudary

2011

Lubrication Science

117

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This paper reviews various synthetic protocols for poly‐α‐olefin (PAO) synthetic lubricant base stocks that have evolved over the years. Apart from conventional Lewis acid catalysts known for the synthesis of poly‐α‐olefins, such as aluminium trichloride and boron trifluoride, several new catalysts such as metallocenes and ionic liquids have been reported by various researchers. With increasing options of catalytic processes available, it is now possible to produce tailor made PAOs and thus control the properties of the end products, such as viscosity and the viscosity index. Although 1‐decene is the most widely used monomer for PAO application, researchers have used a wide range of monomers from 1‐hexene to 1‐tetradecene and internal olefins in some cases. Copyright © 2011 John Wiley & Sons, Ltd.

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Poly(alpha-olefins)

Cited by 24 publications

References 0 publications

Detailed characterisation of isomers present in polyalphaolefin dimer and the effect of isomeric distribution on bulk properties

Detailed characterisation of isomers present in polyalphaolefin dimer and the effect of isomeric distribution on bulk properties

Lubrication and Lubricants

Poly‐α‐olefin‐based synthetic lubricants: a short review on various synthetic routes

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