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Meeting of the International Research Group on wear of Engineering materials
Tribological Properties of Miniature. Polymer Elements (v) Duke C.B. Charge States in Polymers: Application to Triboelectricity (vi) Tamal T. Electrical Conduction Mechanisms and Electric Contacts Performances of Elastomeric Conductive Polymer (vii) SeanorD.A. Triboelectrification of Polymers (viii) DerjaguinB.V., Krotova N.A. and
Toporov Yu.P. Role Played by the Molecular and Electrostatic Forces in the Adhesion of Polymers The paper by B.V. Derjaguin was not presented. The first two papers presented by Dr Moore and this reporter were general reviews of rubber and polymer tribology respectively. Both reviewers divided their topics into the broad classes of interfacial or adhesional processes and cohesive or ploughing mechanisms. Dr Moore stressed the influence of surface topography and dealt with hydrodynamic and elastohydrodynamic lubrication. I dwelt mainly upon adhesion models of friction and the transfer wear processes observed on nominally smooth counterfaces. The second pair of papers by Adams et al and Rymuza were also rather
similar; both dealt with fluid-polymer interactions and their role in the lubrication of polymeric contacts. The first paper considered various aspects of the fluid lubrication of polyethylene terephthalate monofilaments and attempted to predict how polymer surface-liquid interactions attenuate both the autoadhesion and friction. In addition, that paper also covered a number of phenomena unique to fibre friction such as the influence of fibre radius, tension and topography on the friction and lubrication processes. Dr Rymuza analysed the influence of contact angle and wettability of mineral oils on the oil lubrication processes in miniature journal bearings. The final trio of presented contributions were on contact or triboelectrification. Dr Duke provided an interesting introduction to charge injection into polymers by metals. The paper emphasised the influence of the molecular architecture, disorder and dielectric properties of the polymer on charge transfer. Dr Tamal's paper was concerned with the conduction mechanism in particle-filled elastomers. The final presentation, given by Dr Seanor, provided a very interesting and general review of triboelectrification in polymers.
The Russian workers were not present at the meeting. B.V. Derjaguin was scheduled to speak on the relative importance of molecular (van der Waals) and electrostatic forces in polymeric adhesion. The abstract of the paper suggests that the latter are of more consequence than the former. Apart from the papers mentioned above, several others were of relevance to polymer tribology and were presented in either other sessions of this division or other divisions elsewhere in New York City. For example, in the same division, but later in the week, Professor Adamson and Professor Fowkes described interesting new work on adsorption onto polymer surfaces and the acid-base character of polymer surfaces respectively.
There was also a session on adhesion and adsorption where Dr M. Owen and Dr G.A.D. Briggs presented relevant papers on elastomeric solid surfaces. There were too many more to mention, but conference abstracts are available for the whole meeting and provide a comprehensive account of all the papers presented. B.J. Briscoe
Department of Chemical Engineering and Chemical Technology, Imperial College, London, UK, SW7 2BY Complete papers for the "Conference on Physicochemical Aspects of Polymer Surfaces ", edited by K.L. Mittal, will be published next year by Plenum Publishing Company, 227 West 17th Street, New York, N Y 10011, USA
19-21 May 1981, Paris, France
Meeting of the International Research Group on Wear of Engineering Materials Delegates from Belgium, Germany, England, France, Greece, the Netherlands, Canada, Norway, Poland, Sweden, Switzerland and the USA participated in the 8th meeting of the International Research Group on Wear of Engineering Materials, which operates under sponsorship of the Organization for Economic Co-operation and Development (OECD). The meeting was held at the Institut Sup6rieur des Mat6riaux et de la Construction M6canique (ISMCM) at Saint Ouen.
• Systems approach to tribological processes, including discussions on the applicability of theoretical models. • Laboratory simulation of practical tribosystems, taking into account the mechanical and thermal properties of the testing systems. • Pressure distribution in ehd contacts and failure of ehd lubrication in sliding contacts. • Abatement of wear by hard coatings.
The IRG-OECD sees as its main task the fostering of international exchange of experiences and developments in wear abatement, with special emphasis on concerted actions in the following fields:
During a reception at the Paris town hall, three founder members of IRG-OECD, viz. Professor R. Courtel from France, Professor G.W. Rowe from England and Dr G. Salomon from the Netherlands, were presented with the silver medal of the town of Paris in recognition of their outstanding contributions to tribology.
• • • •
Tribotesting and simulation Failure criteria in lubricated systems Wear control and wear mechanisms Information systems and information retrieval
The chairman of IRG-OECD, Professor Czichos from BAM Berlin, presented a review on recent developments in tribology, among other things discussing the tribological work recently performed in Germany under the auspices of the German Ministry for Technology (BMFT). His presentation was followed by 20 contributions which can be grouped in the following main subject categories:
The next meeting of the Group will take place 2 2 - 2 4 September 1982 at the Laboratoire des Recherches Horlog~res, Neuchfitel, Switzerland. It will be possible for interested parties, not directly involved in the work of the Group, to participate as observers. Further information can be obtained from the Technical Secretariat of IRG-OECD, c/o ir. A.W.J. de Gee, Metaalinstituut TNO, PO Box 541, 7300 AM Apeldoorn, The Netherlands
TRIBOLOGY international December 1981
373
Toporov Yu.P. Role Played by the Molecular and Electrostatic Forces in the Adhesion of Polymers The paper by B.V. Derjaguin was not presented. The first two papers presented by Dr Moore and this reporter were general reviews of rubber and polymer tribology respectively. Both reviewers divided their topics into the broad classes of interfacial or adhesional processes and cohesive or ploughing mechanisms. Dr Moore stressed the influence of surface topography and dealt with hydrodynamic and elastohydrodynamic lubrication. I dwelt mainly upon adhesion models of friction and the transfer wear processes observed on nominally smooth counterfaces. The second pair of papers by Adams et al and Rymuza were also rather
similar; both dealt with fluid-polymer interactions and their role in the lubrication of polymeric contacts. The first paper considered various aspects of the fluid lubrication of polyethylene terephthalate monofilaments and attempted to predict how polymer surface-liquid interactions attenuate both the autoadhesion and friction. In addition, that paper also covered a number of phenomena unique to fibre friction such as the influence of fibre radius, tension and topography on the friction and lubrication processes. Dr Rymuza analysed the influence of contact angle and wettability of mineral oils on the oil lubrication processes in miniature journal bearings. The final trio of presented contributions were on contact or triboelectrification. Dr Duke provided an interesting introduction to charge injection into polymers by metals. The paper emphasised the influence of the molecular architecture, disorder and dielectric properties of the polymer on charge transfer. Dr Tamal's paper was concerned with the conduction mechanism in particle-filled elastomers. The final presentation, given by Dr Seanor, provided a very interesting and general review of triboelectrification in polymers.
The Russian workers were not present at the meeting. B.V. Derjaguin was scheduled to speak on the relative importance of molecular (van der Waals) and electrostatic forces in polymeric adhesion. The abstract of the paper suggests that the latter are of more consequence than the former. Apart from the papers mentioned above, several others were of relevance to polymer tribology and were presented in either other sessions of this division or other divisions elsewhere in New York City. For example, in the same division, but later in the week, Professor Adamson and Professor Fowkes described interesting new work on adsorption onto polymer surfaces and the acid-base character of polymer surfaces respectively.
There was also a session on adhesion and adsorption where Dr M. Owen and Dr G.A.D. Briggs presented relevant papers on elastomeric solid surfaces. There were too many more to mention, but conference abstracts are available for the whole meeting and provide a comprehensive account of all the papers presented. B.J. Briscoe
Department of Chemical Engineering and Chemical Technology, Imperial College, London, UK, SW7 2BY Complete papers for the "Conference on Physicochemical Aspects of Polymer Surfaces ", edited by K.L. Mittal, will be published next year by Plenum Publishing Company, 227 West 17th Street, New York, N Y 10011, USA
19-21 May 1981, Paris, France
Meeting of the International Research Group on Wear of Engineering Materials Delegates from Belgium, Germany, England, France, Greece, the Netherlands, Canada, Norway, Poland, Sweden, Switzerland and the USA participated in the 8th meeting of the International Research Group on Wear of Engineering Materials, which operates under sponsorship of the Organization for Economic Co-operation and Development (OECD). The meeting was held at the Institut Sup6rieur des Mat6riaux et de la Construction M6canique (ISMCM) at Saint Ouen.
• Systems approach to tribological processes, including discussions on the applicability of theoretical models. • Laboratory simulation of practical tribosystems, taking into account the mechanical and thermal properties of the testing systems. • Pressure distribution in ehd contacts and failure of ehd lubrication in sliding contacts. • Abatement of wear by hard coatings.
The IRG-OECD sees as its main task the fostering of international exchange of experiences and developments in wear abatement, with special emphasis on concerted actions in the following fields:
During a reception at the Paris town hall, three founder members of IRG-OECD, viz. Professor R. Courtel from France, Professor G.W. Rowe from England and Dr G. Salomon from the Netherlands, were presented with the silver medal of the town of Paris in recognition of their outstanding contributions to tribology.
• • • •
Tribotesting and simulation Failure criteria in lubricated systems Wear control and wear mechanisms Information systems and information retrieval
The chairman of IRG-OECD, Professor Czichos from BAM Berlin, presented a review on recent developments in tribology, among other things discussing the tribological work recently performed in Germany under the auspices of the German Ministry for Technology (BMFT). His presentation was followed by 20 contributions which can be grouped in the following main subject categories:
The next meeting of the Group will take place 2 2 - 2 4 September 1982 at the Laboratoire des Recherches Horlog~res, Neuchfitel, Switzerland. It will be possible for interested parties, not directly involved in the work of the Group, to participate as observers. Further information can be obtained from the Technical Secretariat of IRG-OECD, c/o ir. A.W.J. de Gee, Metaalinstituut TNO, PO Box 541, 7300 AM Apeldoorn, The Netherlands
TRIBOLOGY international December 1981
373