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Title: Highly branched polyethylenes as lubricant viscosity and friction modifiers

Journal Article · · Reactive and Functional Polymers
 [1];  [2];  [2];  [3];  [3]
  1. Pacific Northwest National Lab. (PNNL), Richland, WA (United States); USDA, Riverdale, MD (United States). Agricultural International Service
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  3. Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
+ Show Author Affiliations

A series of highly branched polyethylene (BPE) were prepared and evaluated in a Group I base oil as potential viscosity and friction modifiers. The performance of these BPEs supports the expected dual functionality. Changes in polarity, topology, and molecular weight of the BPEs showed significant effects on the lubricants' performance with respect to viscosity index and friction reduction. In conclusion, this study provides scientific insights into polymer design for future lubricant development activities.

Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
ORNL work for others; USDOE
Grant/Contract Number:
AC05-00OR22725
OSTI ID:
1329132
Alternate ID(s):
OSTI ID: 1332612; OSTI ID: 1397959
Journal Information:
Reactive and Functional Polymers, Journal Name: Reactive and Functional Polymers Journal Issue: C Vol. 109; ISSN 1381-5148
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

References (14)

Dual functional star polymers for lubricants journal January 2016
Synthesis and characterization of low- and medium-molecular-weight hyperbranched polyethylenes by chain walking ethylene polymerization with Pd–diimine catalysts journal October 2011
Hyperbranched−Linear Polyethylene Block Polymers Constructed with Chain Blocks of Hybrid Chain Topologies via One-Pot Stagewise Chain Walking Ethylene “Living” Polymerization journal October 2010
Synthesis of Functional Olefin Copolymers with Controllable Topologies Using a Chain-Walking Catalyst journal May 2003
How Polymers Behave as Viscosity Index Improvers in Lubricating Oils journal January 2015
Topology-Engineered Hyperbranched High-Molecular-Weight Polyethylenes as Lubricant Viscosity-Index Improvers of High Shear Stability journal February 2007
New Pd(II)- and Ni(II)-Based Catalysts for Polymerization of Ethylene and .alpha.-Olefins journal June 1995
A review of recent developments of friction modifiers for liquid lubricants (2007–present) journal June 2014
Mechanistic Studies of the Palladium-Catalyzed Copolymerization of Ethylene and α-Olefins with Methyl Acrylate journal February 1998
Chain Walking: A New Strategy to Control Polymer Topology journal March 1999
A New Generation of High Performance Viscosity Modifiers Based on Comb Polymers journal October 2008
Newtonian Flow Behavior of Hyperbranched High-Molecular-Weight Polyethylenes Produced with a Pd−Diimine Catalyst and Its Dependence on Chain Topology journal April 2003
Hyperbranched polyethylenes by chain walking polymerization: synthesis, properties, functionalization, and applications journal January 2012
Reduction of Friction by Functionalised Viscosity Index Improvers journal October 2007

Cited By (1)

Review of Viscosity Modifier Lubricant Additives journal March 2018

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Related Subjects

36 MATERIALS SCIENCE
viscosity modifier
friction modifier
lubricant additive
highly-branched polyethylene
viscosity index improver