Progress and Trends in Rheology V : Proceedings of the Fifth European Rheology Conference Portoro¿, Slovenia, September 6-11, 1998

Global sustainable development of the world economy requires better understanding and utilization of natural recourses. In this endeavor rheology has an indispensable role. The Rheology Conferences are therefore always an important event for science and technology. The Fifth European Rheology Conference, held from September 6 to 11 in the Portoro-z, Slovenia, will be the first AlI-European rheology meeting after the formal constitution of the European Society ofRheology. As such it will be a special historical event. At this meeting the European Society of Rheology will introduce the Weissenberg Medal, to be bestowed every four years to an individual for hislhers contribution to the field of Rheology. The recipient ofthe first award will be professor G. Marrucci ofthe Universita degli Studi di Napoli, Italy. Two mini Symposia will be part of the Conference. The first, on Industrial Rheology, will commemorate the late professor G. Astarita. The second will honor the eightieth birthday of professor N.W. Tschoegl. This volume comprises extended abstracts of the 15 plenary and keynote lectures and about 300 oral and poster contributions presented at this conference. AII contributed papers were reviewed by members ofthe European Committee on Rheology, assuring the high standard ofthe Conference. Besides the scientific program, the Organizing Committee has prepared an extensive social program that wilI reveal the culture and the natural beauties of Slovenia.

Plenary Papers.- Time-dependence in materials.- A constitutive analysis of uniaxial, equibiaxial and planar extension of linear and branched polyethylene melts.- Keynote Papers.- Flow instabilities as stress limiters for molten polymers.- Recent advances in optical rheometry.- Rheology and microstructure of oil-in-water emulsions.- Creep of solids - micromechanisms of deformation of semicrystalline thermoplastics and their long term behaviour.- Volume/shear interaction in glassy polymers.- Rheology of biopolymer gel systems.- Wall slip of polymer melts from squeeze flow and capillary rheometry.- Some problems related to flow of rheokinetic liquids.- Microstructural changes in structured colloidal dispersions.- Rheology and morphology of immiscible polymer blends.- Elongational behaviour and molecular structure of polymer melts.- Turbulent gas-liquid flows.- Rheological aspects of the design of technological process equipment - internal flows.- Biorheology.- Bioconvection in the black sea unicellular eucariotic algae: aggregate’s rheology and quazimulticellular structures formation.- Rheological behaviour of blood under unsteady flow conditions.- Rheological behaviour and drainage of microscopic foam films from Infasurf.- How viscoelastic properties of colloidal biopolymers modify rheological properties of seawater.- Marine organic aggregates in the northern Adriatic sea, their physical microstructure and biological origins.- Wheat proteins as polymeric materials: rheological properties of plasticized gluten.- Rheological-microstructure investigations of biopolymer mixtures with ‘emulsion’ character.- How viscoelastic properties of colloids, transparent exopolymeric particles and marine organic aggregates, modify turbulence and plankton biodynamics in the sea.- Blends.- Flow induced phase inversion in immiscible polymer blends.- Rheology/Resistivity correlation in carbon black-containing immiscible polymer blends.- Shear-Induced mixing and demixing in poly(styrene-co-maleic anhydride)/poly (methyl methacrylate) blends.- Effect of PU-NBR interactions on blends’ dynamic properties.- Rheological modeling of polymer blends with salami-type morphology.- Rheological properties of grafted PMMA-particles in several polymeric matrices.- Rheological and morphological properties of polymer blends with cocontinuous structures.- The morphology-dependent rheological behaviour of an immiscible model polymer blend.- The effects of adding poly(styrene)-block-poly(butadiene)-block-poly(methylmethacrylate) triblock copolymers on the rheological properties and morphology of PPO/SAN Blends.- The deformation of an ellipsoidal drop under viscous flow conditions.- Drop deformation in immiscible polymer blends.- Modeling and scaling of dichroism relaxation in immiscible polymer blends.- Constitutive Theories and Equations.- Application of physically based creep damage equations to life-time predictions of Kirchhoff-and V. Karman plates.- Constitutive equations for time depending behavior of type loading sensitive materials.- On the use of characteristic variables in viscoelastic flow calculations.- Prediction of shear-bending in flowing micellar systems.- Modelling non-linear and time-dependent behaviour of viscoelastic materials using hierarchical models.- The FENE-L and FENE-LS closure approximations for the kinetic theory of finitely extensible dumbbels.- Experimental-statistical modelling the effect of multi-fractional filler on rheological indices of compositions.- A comparative study of the performance of several constitutive models in the modelling of fluids S1.- Shear viscosity of a molten short fibers composites.- Calculation of the residual stress development in injection moulding using a non-linear viscoelastic model.- Identification of viscoelastic rheological parameters by Inverse analysis.- Energy storage as the characteristic feature of inelastic deformation of solid polymers.- A numerical/experimental study on the performance of enhanced viscoelastic constitutive equations.- Stress contribution in the relaxation of linear polymer melts under extensional flow.- Saw-tooth argument transformation method in the theory of composite materials.- Structure - phenomenological rheology of dilute suspensions in liquid crystals.- Rheology and non-equilibrium thermodynamics.- Fourier-transform rheology.- Electro and Magnetorheology.- The effect of PVP polymer on rheological properties of Na-Bentonite slurry.- Linear viscoelasticity of a model magnetorheological fluid.- Rheology of magnetizable powders related to the mechanics of magnetically stabilized beds.- Dynamics of induced chain structure in electrorheological suspensions.- Electrorheological behaviour of polyaniline and ceramic powder suspensions in silicone oil.- Magnetorheology of model suspensions.- Fluid Mechanics.- Non-stationary simple Couette flow of the Oldroyd’s 3 constants model at small Reynolds numbers.- Secondary flow of fluids in pipes of non-circular cross section.- Annular lineal Couette-Poiseuille flow of viscoplastic fluids.- Power-law fluid through doubly concentrated concentric annuli.- Unsteady flow of an annular, non-isothermal, viscoelastic film.- Strain-thickening in planar flows.- Toms effect in flooded jets.- Visualisation of the flow field of a polymer solution in an open channel.- Experimental and numerical study of the viscous dam-break problem.- Squeeze flow of Bingham plastic.- The effect of waveforms on the vibrational processing of fresh concrete.- Structure of the near-wall turbulence in drag-reducing flow.- Stability of the viscoelastic film flow down an inclined plane.- Curvilinear squeeze film of couple-stress fluid with reference to synovial joints.- Pressure drops in the conical flow of a molten metal.- Troughflow of a Rivlin-Ericksen fluid between fixed surfaces of revolution.- Investigations of flow instabilities on high density polyethylene by Laser Doppler - Velocimetry.- Simulation of mixing of viscoelastic fluids in vessels.- Stokes motions of asymmetrical fibrous particles in a Stuart Vortex flowfield.- Food Rheology.- Characterisation of complex doughs using a novel extrusion rheometer.- Rheological behaviour of food industrial gumms.- Modelling the shear behaviour of soft (cream) cheese.- Study of (SSD) biscuit baking by dynamic thermal analysis (DMTA, DSC, TGA).- Influence of the mixing conditions on the Theological behavior of a biscuit dough.- Rheology of spray-dried egg yolk-xanthan gum aqueous dispersions.- Influence of processing on the rheology of egg yolk products.- Influence of NaCMC in viscous synergism of locust bean gum + kappa carrageenan mixtures.- Rheological behaviour of oil-in-water emulsions stabilized by a spray-dried egg product.- Rheological behavior of crosslinked waxy Maize starch - kappa - carrgeenan mixtures.- Industrial Rheology.- Rheological behaviour of aqueous concentrated glaze suspensions: influence of additives used.- The myth of yield stress fluids.- The measuring of yield stress liquids.- High rate transient start-up flow with glass fibres filled thermoplastics.- Rheology of free-flowing granular materials.- The mixing of yield stress’ fluids.- A non-linear viscoelastic description of the Mooney and Mooney-relaxation test.- Interdependence of rheological parameters and printing quality in textile printing.- Liquid Crystals.- Dynamics of point defects in nematic liquid crystals.- The director trumbling-alignement transition in shear flows of nematic liquid crystal polymers, modelled by continuum theory.- Temperature dependence of the rheological properties of acetoxypropycellulose in the thermotropic chiral nematic phase.- Cure Kinetics behavior and properties of epoxy-amine adhesives.- Elongational viscosity of a thermotropic liquid crystalline polymer.- Numerical simulation of liquid-crystalline polymer start-up flow in an eccentric cylinder geometry using the Doi theory.- Investigation into band texture occurring in liquid crystal polymers.- Transient rheological behaviour of filled lyotropic liquid crystalline polymers.- Determining the molecular weight distribution of polymers from their viscosity function using the first mirror relation.- Viscometric functions of lyotropic LCP’s and their theoretical description.- The susceptibility to orientational ordering of two-dimensional polymer systems depending on the type of extending deformation.- Behavior under flow of side chain liquid crystal polymers.- In situ NMR studies of liquid crystals in shear flow.- Nonsymmetric viscoelasticity of liquid crystalline polymers.- Materials Characterization.- Determination of equation for a family of creep curves for 38 MoCrAl 09 steel based on experimental research.- Impregnation of unwoven materials by polymers with yield stress.- Empirical correlations between free volume fractions from PALS data and various dynamic quantities in orthoterphenyl.- Experimental verifications of the WLF - Doolittle equation for supercooled liquid dynamics by PALS method: polyisobutylene.- Rheology of a solid polycarbonate at high strain rate; experimental study and numerical simulation.- “Double reptation spectrum” an alternative molar mass distribution - material function conversion.- Vibration transmissivity in mechanical systems with rubber elements using viscoelastic models.- Correlation between viscoelastic shear and tension.- Determination of equation of stress relaxation curves based on creep experimental research for 16 Mo 3 steel.- Rheological properties of plasticized starches.- Non-linear stress relaxation in liquid foams.- On search for a generalized constant of polymer melts.- Structure and rheology of a micellar cubic crystal.- The rheological characterization of Rhamsan systems.- Creep recovery and molecular structure of polyethylene melts.- Oscillatory measurements of Styron 457 in toulene - loss and storage modulus master curves.- Characterizing the properties of fresh concrete: BML-viscometer and Btrheom rheometer comparative experiments.- Oscillatory granular flow.- The new methods of reliability criteria for transportation elements.- Measurements of torsion relaxation under hydrostatic pressure.- Determination of the molecular weight distribution of polymer melts.- Finite deformation analysis of origination of narrow slots in viscoelastic bodies.- Extrusion instabilities in polymers and chocolate.- Evaluation of models combining the molecular weight distribution with rheological data.- Rheological characterization of EPDM’s possessing different structures.- Rheological investigations and modeling on semi-solid metal alloys.- Rheological study of the lamellar sponge and micellar phases of the C12E4/CPyCl/benzyl alcohol/water system.- Numerical and experimental investigation of thermal convection for thermodependent Herschel-Bulkley fluid in an annular duct with rotating inner cylinder.- A semi-Lagrangian finite volume method for solving viscoelastic flow problems.- The reliability and durability of viscoelastic systems.- Inverse method for the characterization of the rheology of molten polymers in biaxial extension.- Determining of relaxation time spectra from rheological data using an edge preserving regularization method.- Disentanglement effects in linear and branched polyolefins.- Rheological, mechanical and adhesive properties of the filled LCP-thermoplastic blends.- Free absolute strain of low density polyethylene in relation to screw speed in the extrusion process.- Elastomeric fracture by dynamic arguments.- Rheology of rock massive as a factor of synergetic mechanism of geocatastrophe.- The relationship between foam stability and surface Theological properties.- Comparison of the generalized Maxwell and Stastna model for charaterizing dynamic moduli of modified asphalts.- Modeling of rheology process in mining massif of potash salts rocks with large-scale underground structures.- Rheological characterization of damping materials based on polysiloxanes.- Influence of welan concentration on rheological properties of alumina dispersions in aqueous welan matrices.- Molecular Dynamics and Theories.- The molecular rheology of star polymer melts: binary blends.- Prediction of molecular weight distribution from rheology: poly(dimethylsiloxanes)s blends.- The relaxation spectra of polymer networks with mobile effective viscous medium carrying away by the network.- Influence of mechanical deformation on electro-optical birefringence in polymer networks.- Simulation of polymer solutions in steady elongational flow.- On the expression of the stress tensor in entangled polymers from molecular models.- Modelling low density polyethylene rheology using the POM-POM model.- Dynamics of actin filaments.- Molecular dynamics simulation of unsaturated polyesters modified by poly(ethylene glycol) end groups.- Compressed polymer brushes under the shear flow.- Computer simulation of dilute polymer solutions in transient elongational flows.- Rheology of physical networks.- Microrheological properties in polymeric heterogeneous media by collision dynamics simulation.- Numerical Simulations.- A lattice Boltzmann model for the numerical simulation of non-linear viscoelastic fluids.- Numerical simulation of nonlinear contact interaction between shell structures and supports (stamps) of different types.- The adaptive Lagrangian particle method applied to the start-up flow of finitely extensible dumbbells between eccentric cylinders.- Use of linear viscoelastic constitutive law to model the time-dependent behaviour of an orthotropic glassfibre reinforced plastic.- Granular dynamics simulation for an hexagonal silo.- Numerical analysis of the sorptive behaviour in the wood.- Capillary thinning of polymeric filaments.- The effect of lubricant rheology in dynamically loaded journal bearings.- Determination of rubber melt’s initial viscosity from molecular weight distribution by neural networks.- The role of material in the simulation of the thermoforming process.- Numerical prediction of the encapsulation effect for viscoelastic fluids.- A study of finite volume methods for viscoelastic flows.- Polymer Melts and Polymer Processing.- Starch melting under shear.- Rheotens experiments and elongational behaviour of polymer melts.- Peroxide induced degradation of polypropylene: influence of molecular structure on the rheological properties.- Numerical simulation of the extrusion of polymer melts in the presence of slip at the walls.- Melt rheology of reactive polymer blends.- A new instrument for measuring of rheological properties of gas-containing polymer melts.- Melt rheology of randomly branched polystyrenes.- Determination of the plateau moduli and entanglement molecular weights of polypropylenes of different tacticity.- Effect of flow-induced phase transitions in TLCPS on the viscosity of PE/TLCP blends.- Effect of extrusional shear flow on lamellar polystyrene-polyisoprene diblock copolymers.- Shear flow of highly concentrated carbide powder suspensions.- A close look at the “Sharkskin” melt fracture of polybutadiene.- The influence of processing conditions on mechanical properties of unreinforced and discontinuous glass fibre reinforced thermoplastics.- Shear and elongational flow of smectite / PMMA and hybrids and glass fiber / PMMA composites.- Relationships between processing conditions and rheological behaviour of polyethylens.- Elongational properties of polyolefin melts and correlations with their processing behaviour in film blowing and thermoforming.- Rheological characterization of polyethylene melts with long relaxation times.- Extrusion model for natural rubber compounds.- Effect of filler concentration on the transient viscosity of filled polypropylene melts.- Dependence of rheological properties of polyhydroxyethylene upon the content of additives of oligohydroxyethylene.- Rheological properties of polypropylene-copolyamide mixture melts at phase inversion.- Time evolution of normal stresses ...