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This content will become publicly available on April 24, 2019

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

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:
Report Number(s):
PNNL-SA-129102
Journal ID: ISSN 0014-3057; PII: S0014305717323273
Grant/Contract Number:
AC05-76RL01830; VT0604000- D8132; W911NF1610549
Type:
Accepted Manuscript
Journal Name:
European Polymer Journal
Additional Journal Information:
Journal Volume: 104; Journal ID: ISSN 0014-3057
Publisher:
Elsevier
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)
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
OSTI Identifier:
1434654