@ Copyright 1990 American Chemical Society
The ACS Journal of
Surfaces and Colloids FEBRUARY, 1990 VOLUME 6, NUMBER 2
N
By mposta Symposium on Ordered Particles and Polymer Colloids: Preface Over the past 30 years, researchers have been interested in charged macromolecules that adopt ordered structures. A varied number of systems have been studied over the years: proteins, virus particles, bacteria, inorganic sols, and polymer colloids. The purpose of the symposium was to gain insight into the ordering of crystalline colloids and fundamental interactions between particles and molecules. This symposium included invited and contributed papers; a total of 18 papers was presented. The symposium was held during the 196th National Meeting of the American Chemical Society, Los Angeles, September 25-30, 1988. There were three sessions, and they focused on experimental evidence and calculations of interparticle interactions, experimental evidence and theoretical calculations of polymeric association, and novel synthetic methods for producing ordered structures. The meeting was well attended and drew the interest of a diverse group of chemists, chemical engineers, material scientists, and physicists. The first set of nine papers focused heavily on crystalline polymer colloids. Calculations and theories of interparticle interactions and experimental studies of interactions and phase transitions were the major thrust of discussion. The keynote speaker, Professor N. Ise (Kyoto University, Japan), began the symposium with his presentation on “Ordering of Latex Particles and Ionic Polymers in Solutions”. Y. Monovoukas (Stanford University) discussed his work on “Thermodynamic and Kinetic Studies of Charged Colloidal Suspensions”. Professor R. Rajagopalan (University of Houston) presented “Effective Interaction Forces in Structured Dispersions”. Dr. L. P. Voegtli (University of Illinois, Urbana) discussed “Charge Regulation in Colloidal Phase Transitions”. K. Loudiyi (Oklahoma State University, Stillwater) discussed studies of “Laser-Induced Freezing of Interacting Colloidal Particles”. Professor R. H. Ottewill (University of Bristol, England) began the afternoon session with a presentation of “Scattering Studies of Ordered Polymer Colloids”. Professor B. J. Ackerson (Oklahoma State University, Stillwater) followed with “Shear Processing of Hard Sphere Suspensions”. K. L. Smith (Stanford University) presented “Electric Field Structure Formation
0743-1463/90/ 2406-0295$02.50/0
in Dense Hard Sphere Suspensions”. F. K. Wood (Oklahoma State University, Stillwater) discussed the “Interactions of Colloidal Particles in the Presence of Parallel Applied Fields”. The second set of five papers focused on theoretical calculations of polymeric interactions and experimental evidence of polymer association. Professor A. C. Balms (University of Pittsburgh) presented “A Model for the Reversible Aggregation of Associative Polymers”. Professor S. Granick (University of Illinois, Urbana) presented “Probing the Mobility of Adsorbed Polymer Layers”. Professor T. Nishiya (McGill University) discussed “Circular Dichroism of Membrane Dynamics Focus on Lipid-Protein Interaction”. Dr. S. M. Hosseini (current position, Olin Research, Cheshire, CT) discussed “Polymer-Surfactant Competition in First-Order Transitions Measured by Surface Tension and Xe-Probe NMR”. Dr. W. J. Benton (BP America) presented ”Self-Association of Hydrophobically Associated Polymers”. The final set of three papers focused on new synthetic methods for increasing the surface charge density of various materials. L. M. Johnson (Michigan State University, East Lansing) presented “Silylation-Hydrolysis Reactions of Imogolite: A Tubular Alumino-Silicate Polymer”. Professor W. T. Ford (Oklahoma State University, Stillwater) discussed “Crosslinked Polystyrene Latexes Prepared with [12-(0-Styryloxy)dodecyl]trimethylammonium Bromide”. Last, but not least, the final paper was presented by Dr. A. A. Morfesis (current position, PPG Industries) on ”Synthesis and Mechanism of a Highly Charged Monodisperse Polystyrene Latex”. During the course of the symposium, there were many useful discussions fueled by the presentations listed above. A few of the papers from this symposium have been submitted and are published as a group below. Financial support from the donors of the Petroleum Research Fund, administered by the American Chemical Society, is greatly appreciated. Anastasia A. Morfesis PPG Industries, Inc. P.O. Box 2844 Pittsburgh, Pennsylvania 15230
0 1990 American Chemical Society
