Molecular Basis of Polymer Networks: Proceedings of the 5th IFF-ILL Workshop, Jülich, Fed. Rep. of Germany, October 5–7, 1988Artur Baumgärtner, Claude E. Picot The workshop on the "Molecular Basis of Polymer Networks", held October 5- 7, 1988 in 1iilich, FRG, continued a series of workshops jointly organized by the Institute Laue Langevin (ILL) in Grenoble, and the Institute of Solid State Physics of the KFA, 1iilich. The aim of this workshop was to provide a platform for discussions between theoreticians and experimentalists interested in the physics of polymer networks, in the hope that the two types of discussion would be synergistic. As revealed by the title of this workshop, the main focus of the lectures was on molecular aspects of the problem. The individual parts of these proceedings cover various approaches. Following quite general comments from a physicist examining the situation from "outside", various new theoretical concepts are developed. During the last decade the advent of Small Angle Neutron Scattering (SANS) has allowed the molecular structure of polymer networks to be studied and thus the reliability of the theories to be tested directly at the molecular level. Recent advances in this field are presented. The use of new techniques such as 2H NMR or QELS and the refinements of more classical, mechanical experimental measure ments have provided new information about the relation between the macroscopic behavior and the microscopic structure of polymer networks. Some recent results in this area are discussed for both chemically cross-linked networks and gels built by specific interchain interactions. |
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Page 178
... layer . Now random mixing can be applied within each layer . Furthermore , a surface is a barrier which affects the random walk statistics . DIMARZIO [ 5 ] showed that , in order to get the proper chain statistics , the surface should ...
... layer . Now random mixing can be applied within each layer . Furthermore , a surface is a barrier which affects the random walk statistics . DIMARZIO [ 5 ] showed that , in order to get the proper chain statistics , the surface should ...
Page 179
... layer i to layer j . Following LEERMAKERS [ 10 ] , λ is approximated by the following reasoning : Allowing a segment only to be be connected to segments in the same , or in an adjacent layer , it is reasonable to assume that the number ...
... layer i to layer j . Following LEERMAKERS [ 10 ] , λ is approximated by the following reasoning : Allowing a segment only to be be connected to segments in the same , or in an adjacent layer , it is reasonable to assume that the number ...
Page 181
... layer k ( s , d ) , the third factor is related to the probability of the chains tracing out the path of ... layer i ) = n L4 exp ( HTHO ) Pi . KT ( 10 ) Since Li / n is the probability of finding a site in layer i divided by the ...
... layer k ( s , d ) , the third factor is related to the probability of the chains tracing out the path of ... layer i ) = n L4 exp ( HTHO ) Pi . KT ( 10 ) Since Li / n is the probability of finding a site in layer i divided by the ...
Contents
Remarks | 2 |
The BaumgärtnerMuthukumar Effect in Networks | 11 |
Statistical Mechanics of dDimensional Polymer Networks and Exact | 17 |
Copyright | |
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anisotropy Basis of Polymer Bastide Baumgärtner behaviour calculated carrageenan chain segments Chem chemical chemical potential concentration conformation constraints corresponding crosslinking curves deformation density dependence deswelling deuterated distribution dynamics Editors Edwards effect elastic free energy elementary strand elongation entanglements entropy equation equilibrium excluded volume experimental experiments exponent factor Flory Flory-Huggins Flory-Huggins theory fluctuations fractal dimension free chains free energy Gaussian gelation Gennes helix Herz increases interaction parameter isotropic labelled paths length linear Macromolecules macroscopic measurements melt modulus Molecular Basis molecular weight monomers network chains neutron scattering observed obtained P.G. de Gennes PDMS chains phantom network Phys Picot polybutadiene polyelectrolyte Polymer Networks polymeric fractals Proceedings in Physics radius of gyration ratio relaxation Rouse model rubber elasticity sample scaling solution solvent Springer Proceedings star molecules structure swelling swollen temperature theory topological uniaxial values vector Vilgis viscoelastic volume fraction