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Title: Low Molecular Weight Polymethacrylates as Multi-Functional Lubricant Additives

Abstract

In this study, low molecular weight, moderately polar polymethacrylate polymers are explored as potential multi-functional lubricant additives. The performance of these novel additives in base oil is evaluated in terms of their viscosity index, shear stability, and friction-and-wear. The new compounds are compared to two benchmarks, a typical polymeric viscosity modifier and a fully-formulated oil. Results show that the best performing of the new polymers exhibit viscosity index and friction comparable to that of both benchmarks, far superior shear stability to either benchmark (as much as 15x lower shear loss), and wear reduction significantly better than a typical viscosity modifier (lower wear volume by a factor of 2-3). The findings also suggest that the polarity and molecular weight of the polymers affect their performance which suggests future synthetic strategies may enable this new class of additives to replace multiple additives in typical lubricant formulations.

Authors:
 [1];  [2];  [2];  [1];  [3]
  1. Pacific Northwest National Lab. (PNNL), Richland, WA (United States). Energy and Environment Directorate
  2. Univ. of California, Merced, CA (United States). School of Engineering
  3. Pacific Northwest National Lab. (PNNL), Richland, WA (United States). Energy and Environment Directorate; Univ. of California, Merced, CA (United States). School of Engineering
Publication Date:
Research Org.:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States); Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Vehicle Technologies Office (EE-3V); US Army Research Office (ARO); Afton Chemical Corp., Richmond, VA (United States); Evonik Industries, Essen (Germany)
OSTI Identifier:
1434654
Report Number(s):
PNNL-SA-129102
Journal ID: ISSN 0014-3057; PII: S0014305717323273
Grant/Contract Number:  
AC05-76RL01830; VT0604000- D8132; W911NF1610549
Resource Type:
Accepted Manuscript
Journal Name:
European Polymer Journal
Additional Journal Information:
Journal Volume: 104; Journal ID: ISSN 0014-3057
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 42 ENGINEERING; viscosity index improvers; viscosity modifiers; functionalized polymethacrylates; shear stability; polymeric anti-wear additives

Citation Formats

Cosimbescu, Lelia, Vellore, Azhar, Shantini Ramasamy, Uma, Burgess, Samantha A., and Martini, Ashlie. Low Molecular Weight Polymethacrylates as Multi-Functional Lubricant Additives. United States: N. p., 2018. Web. https://doi.org/10.1016/j.eurpolymj.2018.04.029.
Cosimbescu, Lelia, Vellore, Azhar, Shantini Ramasamy, Uma, Burgess, Samantha A., & Martini, Ashlie. Low Molecular Weight Polymethacrylates as Multi-Functional Lubricant Additives. United States. https://doi.org/10.1016/j.eurpolymj.2018.04.029
Cosimbescu, Lelia, Vellore, Azhar, Shantini Ramasamy, Uma, Burgess, Samantha A., and Martini, Ashlie. Tue . "Low Molecular Weight Polymethacrylates as Multi-Functional Lubricant Additives". United States. https://doi.org/10.1016/j.eurpolymj.2018.04.029. https://www.osti.gov/servlets/purl/1434654.
@article{osti_1434654,
title = {Low Molecular Weight Polymethacrylates as Multi-Functional Lubricant Additives},
author = {Cosimbescu, Lelia and Vellore, Azhar and Shantini Ramasamy, Uma and Burgess, Samantha A. and Martini, Ashlie},
abstractNote = {In this study, low molecular weight, moderately polar polymethacrylate polymers are explored as potential multi-functional lubricant additives. The performance of these novel additives in base oil is evaluated in terms of their viscosity index, shear stability, and friction-and-wear. The new compounds are compared to two benchmarks, a typical polymeric viscosity modifier and a fully-formulated oil. Results show that the best performing of the new polymers exhibit viscosity index and friction comparable to that of both benchmarks, far superior shear stability to either benchmark (as much as 15x lower shear loss), and wear reduction significantly better than a typical viscosity modifier (lower wear volume by a factor of 2-3). The findings also suggest that the polarity and molecular weight of the polymers affect their performance which suggests future synthetic strategies may enable this new class of additives to replace multiple additives in typical lubricant formulations.},
doi = {10.1016/j.eurpolymj.2018.04.029},
journal = {European Polymer Journal},
number = ,
volume = 104,
place = {United States},
year = {2018},
month = {4}
}

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Cited by: 3 works
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Figures / Tables:

Table 1 Table 1: Polymer analog and benchmark solutions studied in this research.

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Works referenced in this record:

Spurious Mild Wear Measurement Using White Light Interference Microscopy in the Presence of Antiwear Films
journal, October 2009

  • Benedet, Juliane; Green, Jonathan H.; Lamb, Gordon D.
  • Tribology Transactions, Vol. 52, Issue 6
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A viscosity modifier solution to reconcile fuel economy and durability in diesel engines
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  • Lubrication Science, Vol. 11, Issue 4
  • DOI: 10.1002/ls.3010110402

Review of Viscosity Modifier Lubricant Additives
journal, March 2018


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    journal, February 2019

    • Fan, Mingshuai; Zhang, Yongjie; Li, Xiaopei
    • Polymers for Advanced Technologies, Vol. 30, Issue 5
    • DOI: 10.1002/pat.4555

    Molecular design and shear stability correlations of dendritic polymethacrylates
    journal, January 2019

    • Cosimbescu, Lelia; Malhotra, Deepika; Campbell, Kristen B.
    • Molecular Systems Design & Engineering, Vol. 4, Issue 6
    • DOI: 10.1039/c9me00081j

    Review of Viscosity Modifier Lubricant Additives
    journal, March 2018


    Film Forming Capability of Polymer-Base Oil Lubricants in Elastohydrodynamic and Very Thin Film Regimes
    journal, April 2019