Lubrication Fundamentals

Pirro, Don M.; Daschner, Ekkehard

doi:10.1201/9781420029239

Cited by 101 publications

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“…These lubricants are commonly used in refrigeration systems, among other applications [1][2][3][22][23][24][25]. We have analyzed the viscosity behavior against pressure and temperature, together with the viscosity index (VI), the temperature-viscosity coefficient, and the local pressure-viscosity coefficient.…”

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confidence: 99%

“…They are prepared by the reaction of alkylene oxides (also referred to as oxiranes and epoxides), usually ethylene and propylene oxides (EO and PO), with compounds that contain active hydrogen, like alcohols or water in the presence of a basic catalyst [1,2]. Variation of the ratio of the epoxides and of the end groups leads to different products.…”

Section: List Of Symbolsmentioning

confidence: 99%

“…Even if the PAG fluid does not initially contain any water, it has tendency to absorb moisture from the atmosphere, which can be a problem when used in open lubricated systems. Another important advantage [1,4] of PAGs is that these lubricants decompose completely into volatile compounds under high-temperature oxidizing conditions. As a result, we obtain low sludge build up under moderate-to-high operating temperatures, or complete decomposition without leaving deposits in certain extremely hot applications, and therefore maintaining the cleanliness of the lubricated system.…”

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confidence: 99%

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Pressure–Viscosity Coefficients for Polyalkylene Glycol Oils and Other Ester or Ionic Lubricants

et al. 2011

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We present in this article new viscosity and density data for polypropylene glycol monomethyl ether, which completes a series of articles where we have published dynamic viscosity data of poly(propylene glycol) dimethyl ethers, dipentaerythritol esters, and pentaerythritol esters. New dynamic viscosity measurements up to 60 MPa at five temperatures in the range of 303.15-373.15 K, and density values at temperatures ranging from 298.15 to 398.15 K up to 60 MPa are reported in addition to other physical properties that affect the behavior of the fluids in elastohydrodynamic lubrication regime, such as the viscosity index value, VI, the universal pressure-viscosity coefficient, a film , and the temperature-viscosity coefficient, b. The experimental measurements were performed using a rotational automated viscometer Anton Paar Stabinger SVM3000, a rolling-ball viscometer Ruska 1602-830 for high pressures, and an automated Anton Paar DMA HPM vibrating-tube densimeter. Together with these data, we also present a comparison of the film-generating capability for the fluids above mentioned as well as for other five ionic liquids. We analyze the dependence of the molecular structure on the lubrication properties of these oils, which can help the lubricant engineers to develop products with enhanced performance.

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Section: List Of Symbolsmentioning

confidence: 99%

Section: List Of Symbolsmentioning

confidence: 99%

Section: List Of Symbolsmentioning

confidence: 99%

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Pressure–Viscosity Coefficients for Polyalkylene Glycol Oils and Other Ester or Ionic Lubricants

et al. 2011

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“…Modern lubricants, especially motors oils, contain polymeric additives, which modify the viscosity characteristics of the lubricants. [2] Viscosity index improvers, as they are also known, provide an economical enhancement of lubricant performance benefiting engine life and fuel economy just to name a few of their many attributes. Without these specialized oil soluble polymers, today's high performance multigrade lubricants would not be possible.…”

Section: Introductionmentioning

confidence: 99%

Preparation and Evaluation of Some Terpolymers as Lube Oil Additives

Nasser

Ahmed

Kamal

2011

Journal of Dispersion Science and Technology

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“…All commercial lubricants contain additives to enhance their performance. Their amount varies from greater than 1% to 30% or more (Pirro and Wessol, 2001). They boost existing properties; suppress undesirable properties in the base fluids.…”

Section: Introductionmentioning

confidence: 97%

Solvent Free Microwave Assisted Synthesis of Poly Myristyl Acrylate—Characterization and Evaluation as Additives for Lubricating Oil

Ghosh

Karmakar

2014

Petroleum Science and Technology

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Homopolymer of myristyl acrylate was prepared by microwave assisted free radical polymerization method using BZP as initiator with variation of time at a fixed power without any solvent. Characterization of the polymers was done by IR, NMR, and viscometric analysis. Additive performances of each of them (pour point depressant [PPD] and viscosity modifier [VM]) for lubricating oil (lube oil) were also evaluated by standard ASTM methods. A comparison of their performances has also been reported. The molecular weights of the polymers were determined from viscosity measurements in toluene at 313 K and thermal stability was measured by thermogravimetric analysis.

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Lubrication Fundamentals

Cited by 101 publications

References 0 publications

Pressure–Viscosity Coefficients for Polyalkylene Glycol Oils and Other Ester or Ionic Lubricants

Pressure–Viscosity Coefficients for Polyalkylene Glycol Oils and Other Ester or Ionic Lubricants

Preparation and Evaluation of Some Terpolymers as Lube Oil Additives

Solvent Free Microwave Assisted Synthesis of Poly Myristyl Acrylate—Characterization and Evaluation as Additives for Lubricating Oil

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