The first ACS Adhesion Symposium was held in Washington, D.C., September 1971. During the four years since that meeting, much interest in adhesion has been generated among six divisions of the American Chemical Society. Then, in 1974, the Macromolecular Secretariat appointed me to work closely with the six Session chairmen in organizing this Symposium on Science and Technology of Adhesion. Needless to say, the success of the Symposium which took place between April 7 and 10, 1975 in Philadelphia, Pa., is due to their excellent cooperation and the enthusiastic response of con­ tributors. As originally planned, each division was responsible for one session, and most of the papers, including several late con­ tributions, are published in these two volumes of proceedings. During the Symposium, we held a banquet in honor of Professor Herman Mark in celebration of his eightieth birthday. His Plenary Lecture and the Symposium Address by Professor Murray Goodman are published in full at the beginning of the first volume. I thank Professors Mark and Goodman for their excellent presentations on this memorable occasion.

of Volume 9A.- Significant Advances and Developments in Adhesion and Adhesives.- Polymer Progress - Worldwide (Plenary Lecture).- A Tribute to Herman Mark, Mr. Polymer Science (Symposium Address).- One: Interfacial Phenomena and Adhesion.- Introductory Remarks: How to Solve the Problem of Adhesion - A Prescription.- The Conformation of Adsorbed Polystyrene.- Recent Advances in Wetting and Adhesion.- Polymer Reactions on Solid Surfaces.- The Role of Interfacial Processes in Adhesion.- Surface Chemical Criteria for Maximum Adhesion and Their Verification against the Experimentally Measured Adhesive Strength Values.- Discussion.- Two: Synthetic Polymers and Adhesives.- Introductory Remarks.- Structure - Property - Performance Relationships in Synthetic Polymeric Adhesives.- Solvent and Structure Studies of Novel Polyimide Adhesives.- Block Copolymers as Adhesives.- Effects of Adhesive Structure on Impact Resistance and Optical Properties of Acrylic/Polycarbonate Laminates.- Physical Property - Performance Correlations in Contact Adhesive Systems.- Discussion.- Three: Rubber Adhesives and Sealants.- Introductory Remarks.- Mechanisms of Adhesion in Elastomer-to-Textile Bonding.- On Bonding Rubber to Glass.- The Microscopy of Polymeric Adhesive Systems.- High Speed Testing of Rubber-to-Metal Bonds.- The Nature of Rubber Reinforcement by Silane-Treated Mineral Fillers.- Catalysis of Silicone Elastomer Adhesion.- Discussion.- Four: Natural Products and Structural Adhesives.- Introductory Remarks.- The Use of SEM, ESCA, and Specular Reflectance IR in the Analysis of Fracture Surfaces in Several Polyimide/Titanium 6-4 Systems.- The Chemistry of Tackifying Terpene Resins.- Some Factors for Achieving Environmental Resistance in 120 °C Structural Adhesives.- AFluoro-Anhydride Curing Agent for Heavily Fluorinated Epoxy Resins.- Discussion.- Author Index.