Alkyl methacrylate and styrene terpolymers as lubricating oil viscosity index improvers

2007 ◽  
Vol 43 (5) ◽  
pp. 386-394 ◽  
Author(s):  
Ante Jukic ◽  
Elvira Vidovic ◽  
Zvonimir Janovic
Keyword(s):  
Viscosity Index ◽  
Lubricating Oil ◽  
Oil Viscosity ◽  
Alkyl Methacrylate ◽  
Viscosity Index Improvers

Advances in Tribological Design of Poly(alkyl methacrylate) Viscosity Index Improvers

2011 ◽  
Author(s):  
Torsten Stoehr ◽  
Boris Eisenberg ◽  
Ellen Suchert ◽  
Hugh Spikes ◽  
Jingyun Fan
Keyword(s):  
Viscosity Index ◽  
Alkyl Methacrylate ◽  
Viscosity Index Improvers

scholarly journals Improvement Viscosity Index of Lubricating Engine Oil Using Low Molecular Weight Compounds

2019 ◽  
Vol 7 (1) ◽  
pp. 14-17 ◽  
Author(s):  
Shenwar A. Idrees ◽  
Lawand L. Mustafa ◽  
Sabah S. Saleem
Keyword(s):  
Polar Solvent ◽  
Viscosity Index ◽  
Temperature Stability ◽  
Polar Molecule ◽  
Engine Oil ◽  
Lubricating Oil ◽  
Oil Viscosity ◽  
Different Temperatures ◽  
London Dispersion ◽  
Molecular Forces

the effect of polarity of solvent on the viscosity and viscosity index of lubricating engine oil has been studied using ethanol as an example of polar solvent and toluene as an example of non-polar solvent at different solvent ratios and ambient temperature and additionally other experiments have been done at five different temperatures including 100 oC. So that, the activation energy of viscous flow (Ea) was calculated, and for this purpose Arrhenius viscosity-temperature dependence has been applied and the results were 42.128, 29.256 and 35.417KJ/mole for lubricating engine oil mixed with ethanol, toluene and no additives in turn. It additionally shows that adding polar solvent to lubrication engine oil viscosity increases this may be due to the fact of strong inter molecular forces that found in polar molecules such as hydrogen bonding in ethanol makes the solution forces stronger as a result higher viscosity. However, adding non-polar solvent decreases viscosity because of small size of toluene and both paraffinic lubricating oil and toluene have same London dispersion inter molecular forces. Last not least, the result shows that engine oil mixed with non-polar molecule gives more temperature stability than that of polar molecule giving viscosity index (VI) 366 and 580 respectively.

Some styrene alkyl-methacrylate copolymers as viscosity index improvers

2007 ◽  
Vol 36 (12) ◽  
pp. 583-592 ◽  
Author(s):  
H. H. Abou el Nage ◽  
W. M. Abd el Azeim ◽  
Fathy Zanib ◽  
H. Ibrahim Saad
Keyword(s):  
Viscosity Index ◽  
Alkyl Methacrylate ◽  
Methacrylate Copolymers ◽  
Viscosity Index Improvers

Investigation of polyacrylates copolymers as lube oil viscosity index improvers

2012 ◽  
Vol 100 ◽  
pp. 173-177 ◽  
Author(s):  
Salah A. Mohamad ◽  
Nehal S. Ahmed ◽  
Saeed M. Hassanein ◽  
Ahmed M. Rashad
Keyword(s):  
Viscosity Index ◽  
Oil Viscosity ◽  
Viscosity Index Improvers

Jojoba modified polymers as performance modifiers additives for engine oil

2015 ◽  
Vol 67 (5) ◽  
pp. 425-433 ◽  
Author(s):  
Nehal S. Ahmed ◽  
Amal M. Nassar ◽  
Rabab M. Nasser
Keyword(s):  
Vinyl Acetate ◽  
Pour Point ◽  
Viscosity Index ◽  
Vinyl Pyrrolidone ◽  
Proton Nuclear Magnetic Resonance ◽  
Engine Oil ◽  
Lubricating Oil ◽  
Content Type ◽  
Pour Point Depressants ◽  
Viscosity Index Improvers

Purpose – The purpose of this paper is to prepare novel types of copolymers and terpolymers depending on jojoba, and using them as additives for lubricating oil. Design/methodology/approach – Copolymerization of 1 mole of jojoba with 2 moles of vinyl acetate and copolymerization of 1 mole of jojoba with 2 moles of vinyl pyrrolidone were carried out. Then, two series of terpolymers were prepared by reacting (jojoba: vinyl acetate: alkylacrylate) and (jojoba: vinyl pyrrolidone: alkylacrylate), using free radical chain addition polymerization. Elucidation of the prepared polymers was carried out by using Fourier transform infrared spectroscopy, proton nuclear magnetic resonance and gel permeation chromatography, for determination of weight average molecular weight. The thermal stability of the prepared polymers was determined. The prepared polymers were evaluated as viscosity index improvers and pour point depressants for lubricating oil. Findings – It was found that the viscosity index increases with increasing the alkyl chain length of alkylacrylate. The effect of the monomer type was studied, and it was found that the polymers depending on vinyl acetate have great effect as viscosity index improvers and pour point depressants for lubricating oil. Originality/value – The polymerization of jojoba as different copolymers and terpolymers was carried out. The great influence of the prepared additives on modification of the viscosity properties and pour point of the oil was observed.

Sign in / Sign up

Export Citation Format

Share Document