Recent work by the authors has indicated that some types of viscosity index improver polymers can form thick boundary films in lubricated contacts. These films appear to result from the adsorption of molecules of polymer on metal surfaces to produce layers, about 20 nm thick, having higher polymer concentration and thus higher viscosity than the bulk solution.In the current paper it is shown that these VII boundary films are able to separate rubbing surfaces in both rolling and sliding contacts and that they make a significant contribution towards reducing friction and wear at temperatures up to at least 140°C. The mechanism by which these polymers reduce friction and wear is elucidated.


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    Titel :

    Friction and Wear Reduction by Boundary Film-Forming Viscosity Index Improvers


    Weitere Titelangaben:

    Sae Technical Papers


    Beteiligte:
    Spikes, Hugh (Autor:in) / Smeeth, Matthew (Autor:in) / Gunsel, Selda (Autor:in)

    Kongress:

    1996 SAE International Fall Fuels and Lubricants Meeting and Exhibition ; 1996



    Erscheinungsdatum :

    01.10.1996




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch


    Schlagwörter :


    Friction and Wear Reduction by Boundary Film-Forming Viscosity Index Improvers

    Gunsel, S. / Smeeth, M. / Spikes, H. et al. | British Library Conference Proceedings | 1996


    Friction and wear reduction by boundary film-forming viscosity index improvers

    Gunsel,S. / Smeeth,M. / Spikes,H. et al. | Kraftfahrwesen | 1996



    Influence of polymethacrylate viscosity index improvers on friction and wear of lubricant formulations

    Spikes, Hugh / Fan, Jingyan / Müller, Michael | SAE Technical Papers | 2007


    Viscosity index improvers for lubricating oils

    Velichkova,R. / Tencheva,V. / Alexandrov,V. et al. | Kraftfahrwesen | 1990