Colloids and Interface Science, Volume V: Biocolloids, Polymers, Monolayers, Membranes, and General Papers is a collection of manuscripts presented at the International Conference on Colloids and Surfaces, held in San Juan, Puerto Rico on June 21-25, 1976. The conference is sponsored jointly by the Division of Colloid and Surface Chemistry of the American Chemical Society and the International Union of Pure and Applied Chemistry in celebration of the 50th Anniversary of the Division and the 50th Colloid and Surface Science Symposium. This volume is organized into 51 chapters that cover the subjects of biocolloids, polymers, monolayers, membranes, and general papers. Other topics discussed include the thermodynamic aspects of biocolloids; adsorption of polymers; ion-exchange behavior; optical properties of polymers; microvoid films; micellar systems; and liquid crystals. The remaining chapters explore the diffusion and sorption of simple ions, surface properties of copolymers, and adhesion of thermoplastic elastomers.