Core-Crosslinked Star Copolymers as Viscosity Index Improvers for Lubricants

Sparnacci, Katia; Frison, Tommaso; Pó, Riccardo; Antonioli, Diego; Laus, Michele; Notari, Marcello; Assanelli, Giulio; Atzeni, Marco; Merlini, Gianfranco

doi:10.1021/acsapm.2c01039

Cited by 6 publications

(2 citation statements)

References 42 publications

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“…It has a low viscosity index if the viscosity of lubricating oil rapidly decreases when the temperature is raised. On the other hand, lubricating oil has a high viscosity index if temperature increases only marginally, impacts its viscosity [8][9][10][11]. Hyperbranched polymers are one-of-a-kind high branching density polymers, a significant quantity of terminal reactive units and nanosized repeated branched building blocks.…”

Section: Introductionmentioning

confidence: 99%

Structural and viscosity studies of dendritic hyper branched polymer as viscosity index improvers

El-shazly,

Kamal,

Farag

2024

BMC Chemistry

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Star-like structural compounds were synthesized from different moles % of either dodecyl acrylate or triethylenetetramine using a one-pot commercial synthesis technique. The polymers that were created had various terminations. Fourier Transform Infrared (FTIR) spectroscopy and 1HNMR were used to verify the produced polymers’ chemical composition with different terminations. Furthermore, by analysis of Dynamic Light Scattering (DLS), the size and distribution of the synthesised branched polymers were evaluated. Using a Gel-permeation chromatograph, the modified hyperbranched polymer’s molecular weight, synthesized with various end points, were assessed. The unorganized structured prepared compounds with various molar feed ratios dodecyl acrylate: triethylenetetramine (DDA: TETA) was designed as A, B, C, D and E. Moreover, the synthesized additives function as viscosity index improvers (VII). As the concentration of polymeric additives increases, it leads to higher VI values. Similarly, with the increase in percentage of triethylenetetramine in the prepared hyperbranched polymers, the VI also increases. Notably, the most effective VI achieved is (E) = 212. It is noteworthy that all the synthesized hyperbranched polymers exhibited Newtonian behavior in the rheological study.

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Section: Introductionmentioning

confidence: 99%

Structural and viscosity studies of dendritic hyper branched polymer as viscosity index improvers

El-shazly,

Kamal,

Farag

2024

BMC Chemistry

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“…It has a low viscosity index if the viscosity of lubricating oil rapidly decreases when the temperature is raised. On the other hand, lubricating oil has a high viscosity index if temperature increases only marginally impact its viscosity [5][6][7][8]. Hyperbranched polymers are one-of-a-kind high branching density polymers, a signi cant quantity of terminal reactive units and nano-sized repeated branched building blocks.…”

Section: Introductionmentioning

confidence: 99%

“Structural and viscosity studies of dendritic hyper branched viscosity index improvers in one pot step”

El-shazly

Kamal

Farag

2023

Preprint

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Star like structural compounds were synthesized from different moles % of either dodecyl acrylate or triethylenetetramine using a one-pot commercial synthesis technique. The polymers that were created had various terminations. Fourier Transform Infrared (FTIR) spectroscopy and 1HNMR were used to verify the produced polymers' chemical composition with different terminations. Furthermore, by analysis of Dynamic Light Scattering (DLS), the size and distribution of the synthesised branched polymers were evaluated. Using a Gel-permeation chromatograph, the modified hyperbranched polymer's molecular weight synthesized with various end points were assessed. The unorganized structured prepared compounds with various molar feed ratios dodecyl acrylate: triethylenetetramine (DDA: TETA) was designed as A, B, C, D and E. Moreover, the synthesized compounds expressed as viscosity index improver (VII); as the amount of combined additives in the mixture is concentrated in the solution, so does the VI. As the percentage of triethylenetetramine in prepared hyperbranched polymers increases, so does the VI. and the most effective VI is (E) VI = 212. All of the synthesized hyperbranched polymers have Newtonian rheological behavior as their rheological behavior.

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Comparison between methacrylate copolymers and their magnetite nanocomposite as pour point depressant for lubricating base oil

El-Bahnasawi,

Albohy,

El-Azabawy

et al. 2024

Discov Appl Sci

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A novel pour point depressant was synthesized by developing a polymeric nanocomposite using polymethacrylate and magnetite nanoparticles. The primary objective was to assess and compare the efficacy of PMA and PMA/Fe3O4 nanocomposite in reducing the gelation point, yield stress, apparent viscosity, and pour point of waxy crude oil. Extensive assessments were conducted to evaluate the performance of these additives. Rheometry tests were employed to measure the pour point of the lubricating oil pour point following the addition of PMA and PMA/Fe3O4 nanocomposite. The findings demonstrated a significant reduction in pour point, reaching values of − 18 °C, − 27 °C, − 24 °C, and − 36 °C for CP1, CP2, NP1, and NP2, respectively, at an optimal concentration of 10,000 ppm. Various characterization techniques such as Fourier Transform Infrared Spectrometer, Proton Nuclear Magnetic Resonance, X-ray Diffraction, Scanning Electron Microscope, Differential Scanning Calorimetry, Dynamic Light Scattering, Polarized Optical Microscope, and Gel Permeation Chromatography were utilized to analyze the polymers. Furthermore, the effectiveness of each polymer as a viscosity index improver (VII) and pour point depressant for mineral-based oil was evaluated. The mechanism of action of the polymers as pour point depressants was investigated through photomicrographic analysis. Additionally, the rheological properties of the formulated lubricant were assessed and reported. Thermogravimetric analysis was used to determine the thermal stability of the polymers, revealing that the copolymer nanocomposites exhibited higher thermal stability, viscosity index (VI), and molecular weights compared to the copolymers alone. These enhancements in thermal stability and molecular properties contributed to the improved pour point depressant (PPD) properties. Overall, the study successfully synthesized a novel pour point depressant and evaluated its performance using various tests and characterization techniques. The results demonstrated the effectiveness of the additives in reducing the pour point and improving the thermal stability of the lubricating oil.

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Core-Crosslinked Star Copolymers as Viscosity Index Improvers for Lubricants

Cited by 6 publications

References 42 publications

Structural and viscosity studies of dendritic hyper branched polymer as viscosity index improvers

Structural and viscosity studies of dendritic hyper branched polymer as viscosity index improvers

“Structural and viscosity studies of dendritic hyper branched viscosity index improvers in one pot step”

Comparison between methacrylate copolymers and their magnetite nanocomposite as pour point depressant for lubricating base oil

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