LIST OF POSTERS Tube relaxation and self-consistency in the viscoelastic theory for polymer melts J. L. Viovy J. F. Tassin and L. Monnerie Ecole Supkrieure de Physique et de Chimie de Paris France Constraint-release effects in entangled polymer melts J. P. Montfort G. Marin and Ph. Monge UniversitP de Pau et des Pays de l'Adour France Dilute solutions of macromolecules in a Poiseuille flow W. Stasiak and C. Cohen Cornell University Ithaca U.S.A. Computer simulation of the rheological properties of simple molecular liquids D. Brown M. Whittle and J. H. R. Clarke UMIST On dilute solution properties of polymers M. Muthukumar University of Massachusetts Amherst U.S.A. A determination of molecular relaxation times from macroscopic measurements J. F. Tassin P.Thirion and L. Monnerie Ecole Supkrieure de Physique et de Chimie de Paris France Effect of entanglements on dynamics of polymer molecules in the melt observed by neutron spin echo J. S. Higgins and J. E. Roots Imperial College London Factors affecting the dynamics of polystyrene chains in solution G. Allegra F. Ganazzoli E. Lucchelli and S. Briickner Istituto de Chimica del Politecnico Milan Italy and J. S. Higgins Imperial College London Ultrasonic and viscometric studies of cyclic and linear poly(dimethylsi1oxane) melts K. Dodgson R. A. Pethrick and J. A. Semlyen Shefield City Polytechnic Relation between the rheological properties of PMMA solutions and the molecular structure of the polymer W. Oppermann G. Rehage and D. Wagner Technical University Clausthal West Germany Melt rheology of ring polystyrenes J. Roovers National Research Council of Canada Ottawa Canada The molecular-weight dependence of the zero-shear viscosity of polystyrene ring molecules in the melt G. McKenna G. Hild C. Strazielle P. Rempp and A. J. Kovacs CNRS Strasbourg France Diffusion coefficients of polymer chains in dilute solution C. J. Edwards A. Kaye and R. F. T. Stepto UMIST Critical helix contents in gelatin gels D. Durand J. R. Emery and J. Y.Chatellier UniversitP du Maine France Micellar aggregates in viscoelastic solutions studied by proton n.m.r. spectroscopy U. Olsson 0.Soderman and P. Guering University of Lund Sweden