of Volume 5A.- One Mechanisms of Polymer Friction and Wear.- Introductory Remarks.- Friction, Adhesion and Boundary Lubrication of Polymers.- Effect of Surface Energetics on Polymer Friction and Wear.- Adhesion and Deformation Friction of Polymer on Hard Solids.- Interactions of a Model Compound n-C5F12 (to Partially Represent P.T.F.E.) With Clean Iron Film.- Fracture Mechanics Applied to Rubber Abrasion.- Two Polymer Properties and Friction.- Introductory Remarks.- The Nature of Polymer Friction.- Polymer Friction Under Conditions of Deformation Processing.- Shear Strength and Polymer Friction.- Friction and Transfer of Some Polymers in Unlubricated Sliding.- Frictional Heating of a Uniform Finite Thickness Material Rubbing Against An Elastomer.- A Laboratory Study of the Friction of Rubber on Ice.- Three Characterization and Modification of Polymer Surfaces.- Introductory Remarks.- The Application of ESCA to Studies of Structure and Bonding in Polymers.- The Atomic Nature of Polymer-Metal Interactions in Adhesion, Friction, and Wear.- Experimental Investigation of the Effect of Electrical Potential on Adhesive Friction of Elastomers.- The Direct Fluorination of Polymers and the Synthesis of Poly(carbon monofluoride) in Fluorine Plasma.- Structure, Bonding and Dynamics of Surface and Subsurface Polymer Films Produced by Direct Fluorination, as Revealed by ESCA.- Author Index.

Polymers and polymer composites have been increasinqly used in place of metals for various industries; namely, aerospace, automotive, bio-medical, computer, electrophotography, fiber, and rubber tire. Thus, an understanding of the interactions between polymers and between a polymer and a rigid counterface can enhance the applications of polymers under various environments. In meet­ ing this need, polymer tribology has evolved to deal with friction, lubrication and wear of polymeric materials and to answer some of the problems related to polymer-polymer interactions or oolymer­ rigid body interactions. The purpose of this first International Symposium was to introduce advances in studies of polymer friction and wear, especially in Britain and the U.S.S.R. Most earlier studies of the Fifties were stimulated by the growth of rubber tire industries. Continuous research through the Sixties has broadened the base to include other polymers such as nylon, polyolefins, and poly tetra­ fluoroethylene, or PTFE. However, much of this work was published in engineering or physics journals and rarely in chemistry journals; presumably, the latter have always considered the work to be too applied or too irrelevant. Not until recent years have chemists started to discover words such as tribo-chemistry or mechano­ chemistry and gradually become aware of an indispensable role in this field of polymer tribology. Thus, we were hoping to bring the technology up to date during this SympOSium, especially to the majority of participants, polymer chemists by training.