Physics of Finely Divided Matter

1. Properties of Branched Polymers and Gels

   1. Front Matter

      Pages 127-127

      PDF

   2. Structure of Branched Polymers

      • W. Burchard, A. Thurn, E. Wachenfeld

      Pages 128-134

   3. Size Distribution and Conformation of Branched Molecules Prepared by Cross-linking of Polymer Solutions

      • L. Leibler, F. Schosseler

      Pages 135-139

   4. Viscoelastic Effects Occurring the Sol-Gel Transition

      • B. Gauthier-Manuel

      Pages 140-147

   5. Neutron Scattering Investigation of the Loss of Affineness in Deswollen Gels

      • Jacques Bastide

      Pages 148-153

   6. Scaling NMR Properties in Polymeric Gels

      • J. P. Cohen-Addad

      Pages 154-159

2. Elastic and Dielectric Properties of ill-connected Media

   1. Front Matter

      Pages 161-161

      PDF

   2. Scaling and Crossover Considerations in the Mechanical Properties of Amorphous Materials

      • S. Alexander

      Pages 162-170

   3. Elastic Properties of Depleted Networks and Continua

      • P. N. Sen, S. Feng, B. I. Halperin, M. F. Thorpe

      Pages 171-179

   4. The Elastic Properties of Fractal Structures

      • Itzhak Webman

      Pages 180-187

   5. Elasticity of Percolative Systems

      • L. Benguigui

      Pages 188-192

   6. Electrical Properties of Percolation Clusters: Exact Results on a Deterministic Fractal

      • J. P. Clerc, G. Giraud, J. M. Laugier, J. M. Luck

      Pages 193-201

   7. Introduction to the Ionic Transport in Semi-Crystalline Complexes

      • A. Le Mehauté

      Pages 202-205

   8. Williams-Watts or Cole-Cole: The Universal Response of Polymers

      • A. Le Mehauté, L. Fruchter

      Pages 206-209

3. Aggregation and Instability

   1. Front Matter

      Pages 211-211

      PDF

   2. Random Kinetic Aggregation

      • T. A. Witten

      Pages 212-230

   3. Scaling of Cluster Aggregation

      • R. Botet, M. Kolb, R. Jullien

      Pages 231-237

   4. Dynamic Scaling in Aggregation Phenomena

      • Fereydoon Family, Tamas Vicsek

      Pages 238-244

   5. Fractal Growth of Viscous Fingers: New Experiments and Models

      • Gerard Daccord, Johann Nittmann, H. E. Stanley

      Pages 245-251

   6. Fingering Patterns in Hele-Shaw Flow

      • J. V. Maher

      Pages 252-257

The Second Winter School on the "~hysics of Finely Divided Matter" was held at the Centre de Physique des Houches from 25 March to 5 April 1985. This meeting brought together experts from the areas of gels and porous media. People with different backgrounds - chemists, physicists - from university as well as industrial labora­ tories, had the opportunity to compare their most recent experimental and theoreti­ cal results. Although the experimental situations and techniques may seem at first sight unrelated, the theoretical interpretations are very similar and may be divided roughly into two categories: percolation and aggregation. These are present for the description of the synthesis of some gels as well as for a description of the struc­ ture of packings. They are also a precious help for understanding flows in porous media and hydrodynamic instabilities such as viscous fingering. A different aspect, still in its early stages, deals with the influence of a ran­ dom medium on a phase transition. This leads to metastable states and is interpreted in terms of random fields. The following topics were covered: introduction to physical and chemical gels structure of packings and porous media microemulsions percol ati on aggregation elastic and dielectric properties of ill-connected media properties of gels near and far from the gelation threshold flow, diffusion and dispersion in porous media transitions in porous media. Most of these are rapidly growing subjects, and we hope that these proceedings will serve as a reference for those entering this fascinating area.

• biopolymer
• crystal
• diffusion
• dispersion
• dynamics
• elasticity
• mechanical property
• minerals
• multiphase flow
• neutron diffraction
• phase transition
• polymer
• scattering
• surfaces
• transitions

• Centre de Physique, Université Scientifique et Médicale de Grenoble, Les Houches, France

  Nino Boccara

• Commissariat à I’Energie Atomique Service de Spectrometrie et Diffraction Neutroniques C. E. N. Saclay, Gif-sur-Yvette Cedex, France

  Mohamed Daoud

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