| Autor: |
Kerr A; Department of Chemistry, The University of Warwick, Coventry CV4 7AL, U.K., Häkkinen S; Department of Chemistry, The University of Warwick, Coventry CV4 7AL, U.K., Hall SCL; Department of Chemistry, The University of Warwick, Coventry CV4 7AL, U.K., Kirkman P; Lubrizol Limited, The Knowle, Nether Lane, Hazelwood DE56 4AN, Derbyshire, U.K., O'Hora P; Lubrizol Limited, The Knowle, Nether Lane, Hazelwood DE56 4AN, Derbyshire, U.K., Smith T; Lubrizol Limited, The Knowle, Nether Lane, Hazelwood DE56 4AN, Derbyshire, U.K., Kinane CJ; Rutherford Appleton Laboratory, ISIS Neutron and Muon Sourcey, Didcot OX11 0QX, U.K., Caruana A; Rutherford Appleton Laboratory, ISIS Neutron and Muon Sourcey, Didcot OX11 0QX, U.K., Perrier S; Department of Chemistry, The University of Warwick, Coventry CV4 7AL, U.K.; Warwick Medical School, The University of Warwick, Coventry CV4 7AL, U.K. |
| Abstrakt: |
Surface-tethered polymers have been shown to be an efficient lubrication strategy for boundary and mixed lubrication by providing a solvated film between solid surfaces. We have assessed the performance of various graft copolymers as friction modifier additives in oil and revealed important structure-property relationships for this application. The polymers consisted of an oil-soluble, grafted poly(lauryl acrylate) segment and a polar, linear poly(4-acryloylmorpholine) anchor group. Reversible addition-fragmentation chain transfer polymerization was used to access various architectures with control of the grafting density and position of the anchor group. Macrotribological studies displayed promising results with ≈50% reduction in friction coefficient at low polymer treatment rates. QCM-D experiments, neutron reflectometry, small-angle neutron scattering, and atomic force microscopy were used to gather detailed information on these polymers' surface adsorption characteristics, film structure, and solution behavior. |
