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

Journal Article · · European Polymer Journal
 [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
+ Show Author Affiliations

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.

Research Organization:
Pacific Northwest National Laboratory (PNNL), Richland, WA (United States); Argonne National Laboratory (ANL), Argonne, IL (United States)
Sponsoring Organization:
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)
Grant/Contract Number:
AC05-76RL01830; VT0604000- D8132; W911NF1610549
OSTI ID:
1434654
Report Number(s):
PNNL-SA-129102; PII: S0014305717323273
Journal Information:
European Polymer Journal, Vol. 104; ISSN 0014-3057
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 19 works
Citation information provided by
Web of Science

References (14)

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Polyzwitterionic brushes: Extreme lubrication by design journal April 2011
Dual functional star polymers for lubricants journal January 2016
Rheological Influence of Short-Chain Branching for Polymeric Materials under Shear with Variable Branch Density and Branching Architecture journal May 2017
Mechanical degradation of dilute polymer solutions under turbulent flow journal October 2000
Topology-Engineered Hyperbranched High-Molecular-Weight Polyethylenes as Lubricant Viscosity-Index Improvers of High Shear Stability journal February 2007
A structural definition of polymer brushes journal January 2007
Spurious Mild Wear Measurement Using White Light Interference Microscopy in the Presence of Antiwear Films journal October 2009
Verification of the advantages in friction-reducing performance of organic polymers having multiple adsorption sites journal March 2013
Friction reducing effect of multiply adsorptive organic polymer journal June 2009
A viscosity modifier solution to reconcile fuel economy and durability in diesel engines journal September 2016
Thick-boundary-film formation by friction modifier additives journal August 1999
Review of Viscosity Modifier Lubricant Additives journal March 2018

Cited By (4)

Facile synthesis and applications of polypropylene/polydimethylsiloxane graft copolymer journal February 2019
Molecular design and shear stability correlations of dendritic polymethacrylates journal January 2019
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

Figures / Tables (10)

Table 1(p. 6)table Table 1
Figure 1(p. 10)figure Figure 1
Table 2: Part 1(p. 11)table Table 2: Part 1
Table 2: Part 2(p. 11)table Table 2: Part 2
Table 3: Part 1(p. 13)table Table 3: Part 1
Table 3: Part 2(p. 13)table Table 3: Part 2
Table 4(p. 14)table Table 4
Figure 2(p. 16)figure Figure 2
Figure 3(p. 16)figure Figure 3
Graphical Abstract(p. 20)figure Graphical Abstract

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Related Subjects

36 MATERIALS SCIENCE
42 ENGINEERING
viscosity index improvers
viscosity modifiers
functionalized polymethacrylates
shear stability
polymeric anti-wear additives