KHEOIDGY Volume 2: Fluids

RHEOLOGY Volume 2: Fluids

Edited by

Giovanni Astarita Giuseppe Marrucci

Luigi Nicolais University of Nap/es

Nap/es, Italy

SPRINGER SCIENCE+BUSINESS MEDIA, LLC

Library of Congress Cataloging in Publication Data

International Congress on Rheology, 8th, Naples, 1980. Rheology.

Proceedings of the International Congress on Rheology; 8th, 1980) Inc1udes indexes. 1. Rheology - Congresses. 2. Polymers and polymerization - Congresses.

3. Fluid dyanmics - Congresses. 4. Suspensions (Chemistry) - Congresses. 1. Astarita, Giovanni. II. Marrucci, G. III. Nicolais, Luigi. IV. Title. V. Series: International Congress on Rheology. Proceedings; 8th, 1980. QC189.I52 8th,1980 [QCI89.5.A1] 531'.l1s [531'.11] ISBN 978-1-4684-3745-4 ISBN 978-1-4684-3743-0 (eBook) DOI 10.1007/978-1-4684-3743-0 80-16929

Proceedings of the Eighth International Congress of Rheology, held in Naples, Italy, September 1-5, 1980, published in three parts of which this is Volume 2.

© Springer Science+Business Media New York 1980 Originally published by Plenum, New York in 1980

Softcover reprint ofthe hardcover Isi edition 1980 A Division of Plenum Publishing Corporation 227 West 17th Street, New York, N.Y. 10011

AII righ ts reserved

No part of this book may be reproduced, stored in a retrieval system, or transmitted, in any form or by any means, electronic, mechanical, photocopying, microfllming,

recording, or otherwise, without written permission from the Publisher

VIII INTERNATIONAL CONGRESS ON RHEOLOGY

Naples, Septemberl-5, 1980

HONORARY COMMITTEE

PRESIDENT

Prof. J. Kubat, President, International Committee on Rheology

MEMBERS

Dr. G. Ajroldi, Past President, Italian Society of Rheology Prof. U. L. Businaro, Director of Research, FIAT

Dr. E. Cemia, Director, Assoreni Prof. C. Ciliberto, Vice-President, C.N.R.

Prof. G. Cuomo, Rector, University of Naples Dr. A. Del Piero, Director, Tourism Bureau, Town of Naples

Dr. D. Deuringer, Director RAJ, Radio-Television Network, Naples Prof. F. Gasparini, Dean, Engineering School, University of Naples

Porf. L. Malatesta, President, Chemistry Committee, C.N.R. Prof. L. Massimilla, Past Dean, Engineering School, University of Naples Prof. A. B. Metzner, Fletcher Brown Professor, University of Delllware

Prof. N. Polese,President, University Social Services, Naples Prof. M. Silvestri, President, Technical Committee, C.N.R.

Prof. N. W. Tschoegl, Secretary, International Committee on Rheology Sen. M. Valenzi,Mayor, Town of Naples

Prof. A: Valvassori,Director, Istituto Donegani

ORGANIZING COMMITTEE

Prof. G. Astarita, President Prof. G. Marrucci

Prof. L. Nicolais, Secretary

ACKNOWLEDGMENTS

Support from the following Institutions in gratefully acknowledged:

Alitalia, Linee Aeree Italiane, Rappresentanza di Napoli

Assoreni

Azienda Autonoma di Soggiorno, Cura e Turismo di Napoli

Azienda Autonoma di Soggiorno, Cura e Turismo di Sorrento

Centro Ricerche FIAT, S.p.A.

Comitato per la Chimica del Consiglio Nazionale delle Ricerche

Comitato Tecnologico del Consiglio Nazionale delle Ricerche

Istituto Donegani S.p.A.

Opera Universitaria, Napoli

RAJ, Radiotelevisione Italiana, Sede Regionale per la Campania

Societa Italiana di Reologia

U.S. Air Force

Universita di Napoli

CONTENTSOFTHEVOLUMES

VOLUME 1: PRINCIPLES

Invited Lectures (lL) Theory (TH)

VOLUME 2: FLUIDS

Fluid Dynamics (FD) Rheometry (RH)

Polymer Solutions (PS) Polymer Melts (ML)

Suspensions (SS)

VOLUME 3: APPUCATIONS

Polymer Processing (PC) Rubber (RB)

Polymer Solids (SO) Biorheology (BR)

Miscellaneous (MS) Late Papers (LP)

PREFACE

At the VIIth International Congress on Rheology, which was held in Goteborg in 1976, Proceedings were for the first time printed in advance and distributed to all participants at the time of the Congress. Although of course we Italians would be foolish to even try to emulate our Swedish friends as far as efficiency of organization is concerned, we decided at the very beginning that, as far as the Proceedings were concerned, the VIIIth International Congress on Rheology in Naples would follow the standards of time­liness set by the Swedish Society of Rheology. This book is the result we have obtained. We wish to acknowledge the cooperation of Plenum Press in producing it within the very tight time schedule available.

Every four years, the International Congress on Rheology represents the focal point where all rheologists meet, and the state of the art is brought up to date for everybody interested; the Proceedings represent the written record of these milestones of scientific progress in rheology. We have tried to make use of the traditions of having invited lectures, and of leaving to the organizing committee the freedom to choose the lecturers as they see fit, in order to collect a group of invited lectures which gives as broad as possible a landscape of the state of the art in every relevant area of rheology. The seventeen invited lectures are collected in the first volume of the proceedings. We wish to express our thanks, for agreeing to prepare these lectures on subjects suggested by ourselves, and for the effort to do so in the scholarly and elegant way that the reader will appreciate, to all the invited lectureS: R.B.Bird, D.V.Boger, B.D.Coleman, J.M.Dealy, P.De Gennes, C.D.Denson, H.Janeschitz-Kriegl, A.Y.Malkin, R.A. Mashelkar, S.Onogi, C.J.S.Petrie, R.F.Schwarzl, J.Silberberg, K.Te Nijenhuis, C.A.Truesdell, K.Walters, K.Wichterle.

x PREFACE

As for the organization of the Congress itself, at the time of writing it is still in the future, and we can only hope that it will work out smoothly. If it does, a great deal of merit will be due to the people who have agreed to act as Chairmen of the individual sessions, and we wish to acknowledge here their help: J.J.Benbow, B.Bernstein, H.C.Booij, B.Caswell, Y.Chen, M.Crochet, P.K.Currie, M.M.Denn, A.T.Di Benedetto, H.Giesekus, J.C.Halpin, A.Hoffmann, Y.Ivanov, L.P.B.Janssen, T.E.R.Jones, W.M.Jones, H.Kambe, J.L.Kardos, E.A.Kearsley, J.Klein, K.Kirschke, S.L.Koh, J.Kubat, R.F.Landel, R.L.Laurence, G.L.Leal, C.Marco, J.Meissner, B.Mena, A.B.Metzner, S.Middleman, Y.F.Missirlis, S.L.Passman, S.T.T.Peng, J.R.A.Pearson, R.S.Porter, P.Quemada, A.Ram, C.K.Rha, W.R. Schowalter , J.C.Seferis, C.L.Sieglaff, S.S.Sternstein, R.I. Tanner, N.Tschoegl, J.Vlachopoulos, J.L.White, C.Wolff, L.J.Zapas.

The contributed papers have been grouped in eleven subject areas: theory; fluid dynamics; rheometry; polymer solutions; polymer melts; suspensions; polymer processing; rubber; polymeric solids; biorheology; miscellaneous. Of these, the first one (theory) has been included in the first volume together with the invited lectures; the next five, which all deal with fluid-like materials, have been included in the second volume, and the last five have benn included in the third volume. Categorizations such as these invariably have a degree of arbitrariness, and borderline cases where a paper could equally well have been included in two different categories do exist; we hope the subject index is detailed enough to guide the reader to any paper which may be placed in a category unexpected from the reader's viewpoint.

Rheology is not synonymous with Polymer Science, yet sometimes it almost seems to be: papers dealing with polymeric materials represent the great majority of the content of this book. Regret­ting that not enough work is being done on the rheology of non­polymeric materials is an exercise in futility; yet this does seem an appropriate time for reiterating this often repeated consideration.

We would like to have a long list of people whose help in organizing the Congress we would need to acknowledge here. Unfortunately, there are no entries to such a list, with the exception of young coworkers and students who have helped before the time of writing, and will help after it. To these we extend our sincere and warmest thanks; their unselfishness is further confirmed by our inability to report their names. With this

PREFACE

exception, we have organized the technical part of the Congress singlehandedly, and we state this not because we are proud of it, but only as a partial excuse for any mishaps that may, and unfortunately will, take place.

We regret that only the abstract of some papers appear in the Proceedings. The mail service being what it is, some papers did not reach us in time for inclusion in the Proceedings; others reached us in time, but were not prepared in the recommended form. Also, some abstracts reached us so late that there was no time left for preparation of the final paper.

At the very end of the third volume, we have collected what­ever information (title, abstract, or complete paper) we could on contributed papers the very existence of which became known to us after we had prepared the Table of Contents, Author Index and Subject Index. Again, we apologize for this.

Finally, we want to express our most sincere wishes of success to whoever will be in charge of organizing the IXth International Congress in 1984. Based on our own experience, and in view of the Orwellian overtones of the date, we cannot avoid being pleased at the thought that, whoever it is, it will not be us.

Naples, 1st March 1980 Gianni Astarita Giuseppe Marrucci Luigi Nicolais

CONTENTS

VOLUME 2 - FLUIDS

NOTE: Papers identified by the 0 sign were not received in time for inclusion in this book, and only the abstract is included.

Preface

FD 1.1

FD 1.2

FD 1.3

FLUID DYNAMICS

The Flow of Dilute Polymer Solutions Around Cylinders: Characteristic Length of the Fluid •• . • • •

J.-M. Piau

Shear-Thinning Effects in Creeping Flow about a Sphere • • . •

R.P. Chhabra, C. Tiu, and P.H.T. Uhlherr

Measurements of Velocity Fields Around Objects Moving in Non-Newtonian Liquids

O. Hassager, C. Bisgaard, and K. 0stergard

FD 1.4 0 The Effects of Asymmetries on Rapid Bubble Growth and Collapse in Non-Newtonian Fluids • • •

S.K. Hara and W.R. Schowalter

FD 1.5 A Two-Dimensional Asymmetric Flow of a Viscoelastic Fluid in a T-Geometry

D.J. Paddon and H. Holstein

3

9

17

23

25

FD 1.6 Extrusion Flow Between Parallel Plates. • • • • • 31 H. Holstein and D.J. Paddon

xiii

xiv

FD 2. ( The Influence of Chain Stiffness on the Flow Behavior of Polymers in the Entrance of a Capillary • • • • •

D.G. Baird

FD 2.20 An Experimental Investigation of Flow in the Die Land Region of a Capillary Rheometer .•••••

A.V. Ramamurthy and J.C.H. McAdam

FD 2.3 The Entry and Exit Flow into a Slit W. Philippoff

FD 2.4 On Non-Newtonian Flow Through a Slit Plate . • • • • •

FD 2.5

K. Adachi and N. Yoshioka

Elastic Effects in Die Entry Flow .. . •

M.J. Crochet and M. Bezy

FD 2.6 On Hole Pressure Error for Viscoelastic Fluids

FD 2.7

K. Adachi, K. Kawai, and N. Yoshioka

Elastic Gel Birefringence Method as Applied to the Stress Analysis of the Hole Pressure Error • •

T. Arai

FD 3.1 On a Pulsating Flow of Polymeric Fluids N. Phan Thien

FD 3.2 About a Possible Cause of Viscoelastic Turbulence

FD 3.4

U. Akbay, E. Becker, S. Krozer, and S. Sponage1

Frequency Analysis of Electrical Fluctuations - A New Method to Study Flow Instabilities in Capillary Flow .• •.••

K. Hedman, C. K1ason, and J. Kubat

Instability of Jets of Non-Newtonian Fluids • .••• • .

P. SchUmmer and K.H. Tebe1

CONTENTS

37

39

41

47

53

59

65

71

79

85

87

CONTENTS

FD 3.5 Experimental Studies of Heat Transfer in Viscoelastic Flow Through Pipes. Applications to Solar Energy Collectors • • • . • • • . • 93

B. Mena, F. Avila, and M. Sen

FD 3.6 Natural Convection of a Reiner­Rivlin-Fluid in a Rectangular

FD 3.7

FD 4.f

FD 4.2

Enclosures. ••.•• K.J. Ropke and P. SchUmmer

Heat Effect and Temperature Rise for Circular Tube Laminar Flow

A. Ooiwa and K. Kurase

Numerical Solutions for Flow of an Oldroyd Fluid Between Coaxial Rotating Disks • • • • • . . •

R.K. Bhatnagar

Medium and Large Deborah Number Squeezing Flows • • • •

D.M. Binding, F. Avila, A. Maldonado, and M. Sen

FD 4.3 Oscillatory Flow in Pipes of Non­Circular Cross-Section

B. Mena and F. Nunez

FD 4.40 Squeezing Flows of Visco Elastic Liquids • • •• •••.

P. Shirodkar and S. Middleman

FD 4.50 Dilute Polymer Solution Flows Through Periodically constricted Tubes •

V.N. Kalashnikov

FD 4.60 Rheological Effects in the Dynamics of Liquid Films and Jets ~ • •

V.M. Entov

FD 5.1

FD 5.2

The Importance of Rheology in the Determination of the Carrying Capacity of Oil-drilling Fluids

M.A. Lockyer, J.M. Davies and T.E.R.

Structure of Turbulence in Pipe Flow of Viscoelastic Fluids •

P. Schummer and W. Thielen

97

103

109

111

117

121

123

125

127 Jones

133

xvi CONTENTS

FD 5.3 Velocity Field in an Elongational Polymer Solution Flow • • • • • • • • 141

A. Lyazid, O. Scrivener, and R. Teitgen

FD 5.4 Determination of Characteristic Functions of a Viscoelastic Liquid in a Non-viscometric

FD 5.5

Flow. • • • • • . • • J.R. Clermont, P. Le Roy,

and J.M. Pierrard

The Wall Effect in Orthogonal Stagnation Flow • • • • • . • •

T. Hsu, P. Shirodkar, R.L. Laurence and H.H. Winter

RHEOMETRY

RH 1.10 Normal Stress Measurements in Low­Elasticity Liquids

A.S. Lodge, T.H. Hou, and P.P. Tong

RH 1.20 In-line Elasticity Measurement for Molten Polymers

RH 1.3

A.S. Lodge and De Vargas

Measurement of the First Normal Stress Coefficient of Polymer Melts in a Circumferential Flow Through an Annulus by means of a Pressure Difference Transducer .•••••

K. Geiger

RH 1.4 Measurement of the Second Normal Stress Difference by Different Methods with a Rotational Viscometer • • • • •

M. Seeger and W. Heinz

RH 1.5 Normal Stress Measurements in Viscoelastic Liquids Using Holographic Interfero­metry to measure the Free Surface e in the Weissenberg Effect ••••••

Rh 1.6

M.F. Hibberd and H.G. Hornung

Continuous Rheometry: A New Process for On-Line Measurements and

Control for Laboratory and Industry A. Kepes

149

155

163

165

167

173

179

185

CONTENTS

RH 2.1 Slit Rheometry of BPA-Polycarbonate M.G. Hansen and J.B. Jansma

RH 2.2 Non-Newtonian Viscosity at High Stresses • . • . . • . .

A. Estwood and G. Harrison

RH 2.3 Force Balance Capillary Rheometer J.P. Chalifoux and E.A. Meinecke

RH 2.4 Slip Effect in Viscosity Measurement of Gases at Low Pressure with an Oscillating-Disk Viscometer

RH 2.5

RH 2.6

RH 2.7

K. Yoshida, Y. Kurano and M. Kawata

A Modified Pulsatile Flow Apparatus for Measuring Flow Enhancement in Combined Steady and Oscillatory Shear Flow . . •

J.M. Davies and A. Chakrabarti

Non-Isothermal Rotational Viscometry A.Ya. Malkin and A.M. Stolin

A New Research Rheometer J .M. Starita

RH 3.1 Use of Annular Flat Plates in the Modified Balance Rheometer to Measure Normal Stresses

T.E.R. Jones and J.M. Davies

RH 3.2 On the Torque and Energy Balances for the Flow Between Eccentric

RH 3.3

Rotating Discs H.A. Waterman

A Computerized Torsional Pendulum for Measuring the Dynamic Mechanical Properties of Polymers . . • • •

M. Seeger

RH 3.40 The Measurement of Dynamic Shear Properties of Polymer Melts With a Rheovibron Viscoelastometer

RH 3.5

T. Murayama

The Measurement of the Elongational Viscosity of Polymer Solutions

J. Ferguson and M.K.H. El-Tawashi

xvii

193

199

205

211

217

223

229

235

241

249

255

257

xviii

RH 3.60 The Use of Extensional Rheometry to Establish Operating Parameters for Stretching Processes • •

G.H. Pearson and R.W. Connelly

PS 1.1

POLYMER SOLUTIONS

Dilute Solution Properties of Polystyrene, Polymethylmethacrylate and Their Copolymers . . . . . . . .

S .K. Ahuja

PS 1.20 Correlations for Relaxation-Times for Monodisperse Polystyrene Solut ions . . . . . . . . .

PS 1.3

P. Attane, P. Le Roy, J.M. Pierrard, and G. Turrel

Hydrophobic Effects on the Intrinsic Viscosity of Globular Proteins

R. Tanner and C.K. Rha

PS 1.4 Linear Viscoelastic Properties of Polybutadiene Solutions

G. Marin, W.W. Graessley, J.P. Montfort, and P. Monge

PS 1.50 A Comparison of the Behavior of Concentrated Polyisobutylene Solutions and the Predictions of a New Constitutive Equation

PS 1.6

L.J. Zapas

Characterization of Concentrated Systems: Constraints and Compressibility Effects

J.A. Menjivar and C.K. Rha

PS 1.70 Broad Shear Range Viscometry of High Polymer Solutions: Polystyrene and Polyisobutene in Decalin

PS 2.1

T. Shimida, P.L. Horng, and R.S. Porter

Shear Rate Dependence of the Association of High Molecular Weight Macro­molecules in Dilute Solutions

M.N. Layec-Raphalan and C. Wolff

CONTENTS

263

267

275

277

285

291

293

301

303

CONTENTS

PS 2.2

PS 2.3

PS 2.4

Ultrasonic Velocities and Rao Formalism in Polymer Solutions • • • •

R.P. Singh, G.V. Reddy, S. Majumder, and Y.P. Singh

The Importance of Energetic Interactions on The Viscoelastic Properties of Polymer Solutions • • • • • • •

W.M. Ku1icke

Effects of Polymer Concentration and Shear Rate on Diffusion in Polysaccharide Solutions .

D.W. Hubbard, F.D. Williams, and G.P. Heinrich

PS 2.50 Non-Newtonian Effects in Dilute Solutions Due to Heterogeneity

PS 2.6

PS 2.7

C. Elata and H. Ram

An Analysis of Rheological Behaviors of Polymer Solution with Beads­Spring Model • • • • • • • . . •

Y.T. Hsu and P. Schummer

A Rheological Investigation of a Semi­Stiff Chain Aromatic Po1yamine­dehydrazide in Dilute Solution: Ultra-High Modulus Fibres and Liquid Crystalline Polymer Solutions .•.•

L.L. Chapoy and N.F. La Cour

PS 2.80 Shear Degradation of Po1y(Viny1 Acetate) in Toluene Solutions by High Speed Stirring • . . • • • • • . •

S.H. Agarwal and R.S. Porter

PS 3.1

PS 3.2

Apparent Viscosity Characteristics of Guar Gum Sols .•• • • • •

S.C. Naik

Polymers in Enhanced Oil Recovery­Solution Structure and Viscosity of Water Soluble Vinyl Polymers

J. Klein

PS 3.3 Rheological Properties of Polymer Solutions Used for Tertiary Oil. Recovery • • • .

W. Lange and G. Rehage

xix

309

315

319

325

327

333

339

341

347

353

xx

PS 3.4

PS 3.5

PS 4.1

PS 4.2

PS 4.3

PS 4.4

PS 4.5

ML 1.1

ML 1.2

Dependence of Drag Reduction on Polymer Size Distribution and Configuration • • • •

N.C. Sandjani, J.M. Sangster, and H.P. Schreiber

Application of Thermodynamics to Stability of Flow and Drag Reduction • • • • • • • •

W.M. Jones

Contribution to the Elongational Viscosimetry of High-Polymeric Solutions ••••..•.

E.O. Reher and R. Kramer

Dynamic of Flexible and Large Macromolecules in Elongational Flow Using Flow Refringence

R. Cressely and R. Hocquart

Extensional Flow of Dilute Polymer Solution .•.••.

S.T.J. Peng and R.F. Landel

Effect of Molecular Weight and Flow Type of Flow Birefringence on Dilute Polymer Solutions

G.G. Fuller and L.G. Leal

Viscoelastic Properties of Mixtures of Optical Isomers of Polybenzylglutamate in Liquid Crystal Solution in Tetrahydrofuran

D.B. Du Pre and D.L. Patel

POLYMER MELTS

Elongational Viscosity of Polyethylene Melts • • . • • • • . • •

G. Attalla, G. Corrieri, and D. Romanini

The Elongational Behavior of Various Polymer Melts ••.•.• • •

H. M'dnstedt

CONTENTS

359

365

371

377

385

393

399

407

413

CONTENTS

ML 1.3 Stresses and Recoverable Strains of Stretched Polymer Melts and Their Prediction by Means of a Single Integral

xxi

Constitutive Equation . . . . . • . . • . . 419

ML 1.4

ML 1.5

ML 1.6

ML 1.7

H.M. Laun

Uniaxial Extensional Experiments with Large Strains Performed with Low Density Polyethylene (LDPE)

T. Raible and J. Meissner

Large Homogeneous Biaxial Extension of Polyisobutylene and Comparison with Uniaxial Behavior . . .

S.E. Stephenson and J. Meissner

Non-Isothermal Effects in the Elongational Flow of Polymer Melts . . . .

D. Acierno, L. Dieli, F.P. La Mantia, and G. Titomanlio

Double Step Strain and Relaxation of Polymer Melts . . . . . . . .

G. Marrucci, F.P. La Mantia, G. Spadaro, and G. Titomanlio

ML 1.8 Q Constitutive Equations, Deformation Rate Softening and Elongational Flow Characteristics of Polymer Melts ............ .

J.L. White, H. Tanaka, and W. Minoshima

ML 2.1 Rheo-Optical Study of the Flow of Molten Polymers " • .

C. Dehenneau

ML 2.2 Two Simple Time-Shear Rate Relations Combining Viscosity and First Normal Stress Coefficient in the Linear and Non-linear Flow Range

W. Gleissle

ML 2.3 Applications of the Laser Doppler Velocimetry of Polymer Melt Flow Studies . . . . .

H. Kramer and J. Meissner

425

431

437

443

449

451

457

463

xxii

ML 2.4 Effect of Carbon Black on the Rheological Properties of Styrene n-Butyl Methacrylate Copolymers • . . . . .

S .K. Ahuja

ML 2.5 Large Elastic Deformations of Flowing Polymers in Shear and Extension

A.Y. Malkin, O.Y. Sabsai, and V.P. Begishev

ML 2.6° Microviscoelasticity and Viscoelastic Properties of Linear Flexible-Chain Polymers . . . . .

G.V. Vinogradov, Y.G. Yanovsky, L.I. Iv an ova , and V.S. Volkov

ML 2.7° The Effect of Ultrasonic Vibration on Polymers in Fluid State

M.L. Fridman, S.L. Peshkovsky, A.I. Tukachinski, V.I. Brizitsky, and G.V. Vinogradov

ML 3.1 Capillary Rheometry of Polypropylene: Influence of Molecular Weight on Die Swelling . .

D. Romanini and G. Pezzin

ML 3.2 The Creep Behavior of a High Molecular Weight Polystyrene . . .

D.J. Plazek, N. Raghupathi, and V.M. O'Rourke

ML 3.3° Flow Characteristics of Epoxide Prepolymers ....•.

J.V. Aleman

ML 3.4 Linear and Nonlinear Viscoelastic Behavior of ABS Melts

H.C. Booij and J.H.M. Palmen

. .

·

·

·

ML 3.5 The Influence of Molecular Weight on the Rheological Parameters and Relaxation Spectrum of Poly (2,6 Dimethyl - 1,4 Phenylene

.

.

CONTENTS

469

· · · 477

· · · 483

· · 485

· · · 487

· · · 493

499

501

Oxide) . • . . . . . . . . . . . . . . . . . 507 L.R. Schmidt and J.A.O. Emmanuel

CONTENTS

ML 3.7 Oscillatory Rheology: Polycarbonate C.J. Aloisio and V.W. Boehm

ML 4.1° The Viscoelastic Properties of Helts of Polypropylene and its Blends with High-Density Polyethylene. • • •

J.S. Anand and I.S. Bhardwaj

ML 4.2

ML 4.3

Rheology and Horphology of Dispersed Two-Phase Polymer Blends in Capillary Flow .•....

N. Alle and J. Lyngaae-Jorgensen

Experimental Study of the Rheological Properties of Ion Containing Amorphous Polymers . . . . •

G. Broze, R. Jerome, P. Teyssie, and C. Harco

ML 4.4 Entanglement Formation near the Glass Transition Temperature

ML 4.5

ML 4.6

ML 4.7

SS 1.1

SS 1.2

H.H. Kausch and K. Jud

Irreversible Network Disentanglement and Time-Dependent Flows of Polymer Helts . . . . . . . . .

H.H. Wagner

The Effect of Pressure on Helt Viscosity of High Impact Polystyrene Helt Containing Antimony Trioxide

F. Vecerka and Z. Horak

Influence of Blending Upon Rheological Properties of Polymer in the Helt

V. Dobrescu

SUSPENSIONS

A Procedure for the Definition of a Thixotropic Inelastic Hodel

R. Lapasin, A. Alessandrini, and F. Sturzi

Some Aspects of the Flow Properties of High-Build Paints . . . .

R. Lapasin, A. Papo, and G. Torriano

xxiii

513

519

521

527

535

541

549

555

563

569

xxiv

SS 1.3

SS 1.5

Determination of the Thixotropic Property of an Emulsion Gel Paint •...•.•

D.C.H. Cheng and R.A. Richmond

Constitutive Equations for Concentrated Suspensions . . . . . . . .

D.V. Boger, R.R. Hui1go1, and N. Phan Thien

A Mixture Theory of Suspensions . S.L. Passman, J.W. Nunziato,

P.B. Bailey, and E.K. Walsh

ss 1.b Dispersion in Laminar Flows R.L. Powell and S.G. Mason

SS 1.70 Structure Formation in Concentrated Disperse Systems under Dynamic

SS 2.1

SS 2.2

Conditions ......... . N.B. Uriev

Viscoelastic Properties of Highly Filled Liquid Polyester Compositions .. . . . . .

Y. Ivanov, R. Rotsi1kova, and Y. Simeonov

An Experimental Study of the Dynamic Viscosity of Emulsions With Small Droplets in the kHZ Region .. . . . . . . . .

M. Oosterbroek, J.S. Lopu1issa, and J. Mellema

SS 2.3 0 Microrheo1ogy of Suspensions: Oscillations in Viscosity of Sheared Suspensions of Uniform Rigid Rods .....

Y. Ivanov, Z. Prie1, and S.G. Mason

ss 2.4 Rheological Characterization of Paste-Like Disperse Systems . . . . . . . . . .

D. Hadjistamov

SS 2.5 Rheology of Ageing of Coal-Oil

CONTENTS

575

581

583

591

593

595

601

607

609

Suspensions . . . . • . . . . . . . • 615 S.N. Bhattacharya and L. Barro

CONTENTS

SS 2.6 Rheological Properties of Allophane Colloid • . . . . • . . .

R. Yasutami and M. Seno

SS 2.70 Steady Shear and Viscoelastic Properties of Sterically Stabilized Non-aqueous Dispersions

T.H. Milkie, M.L. Hair, and M.D. Croucher

SS 3.1/2°Rheology of Suspensions S.G. Mason

SS 3.3

SS 3.4

SS 3.5

A Two-Fluid Model for Highly Concentrated Suspension Flow Through Narrow Tubes and Slits: Velocity Profiles, Apparent Fluidity and Wall Layer Thickness

D. Quemada, J. Dufaux, and P. Mills

Suspensions Flow Described by Means of a Micropolar Fluid Theory and Apparent Viscosity of Aggregable Particle Suspension in a Couette Flow

P. Mills, J.M. Rubi, and D. Quemada

On Boundary Conditions for Fluids • • • . • . .

J.M. Rubi, P. Mills, D. and J. Casas-Vasquez

Micropolar

Quemada,

SS 3.6 Rheology of Disperse Systems­Influence of NaCl on Viscous Properties of Aqueous Bentonite Suspensions . . . . • . . . . .

SS 3.7

M. Ippolito and C. Sabatino

Analysis and Estimation of the Yield Stress of Dispersions

E.R. Lang and C.K. Rha

Author Index .

Subj ect Index

xxv

623

629

631

633

639

645

651

659

667

675