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 14
... excluded volume to obtain a variety of laws according to the values of the excluded volume , the disorder and the chain length . EM found an extrapolation formula < R2 > = 1 z 2 ( 1 − e − v2 Ne2 ) , ( 3.1 ) where v = cf W2 ( r ) d3r ...
... excluded volume to obtain a variety of laws according to the values of the excluded volume , the disorder and the chain length . EM found an extrapolation formula < R2 > = 1 z 2 ( 1 − e − v2 Ne2 ) , ( 3.1 ) where v = cf W2 ( r ) d3r ...
Page 58
... excluded volume interaction between the chain segments induces in general an overswelling , but according to the present model it is not homogeneous . As a matter of fact , the " frozen blobs " are already in an optimal excluded volume ...
... excluded volume interaction between the chain segments induces in general an overswelling , but according to the present model it is not homogeneous . As a matter of fact , the " frozen blobs " are already in an optimal excluded volume ...
Page 219
... excluded volume case ( dotted lines ) . Ti = ( 6 = ) ( 3.12 ) where z is obtained from the constaint ( 2.1 ) and can ... excluded volume effects In this section we extend the treatment just given to the more realistic case in which ...
... excluded volume case ( dotted lines ) . Ti = ( 6 = ) ( 3.12 ) where z is obtained from the constaint ( 2.1 ) and can ... excluded volume effects In this section we extend the treatment just given to the more realistic case in which ...
Contents
Remarks | 2 |
Statistical Mechanics of dDimensional Polymer Networks and Exact | 17 |
FluctuationInduced Deformation Dependence of the FloryHuggins | 35 |
Copyright | |
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42 Editors anisotropy Basis of Polymer Bastide Baumgärtner and C.E. behaviour C.E. Picot Molecular calculated carrageenan chain segments Chem chemical chemical potential concentration conformation constraints corresponding crosslinking curves deformation density deswelling deuterated distribution dynamics effect elastic free energy elementary strand elongation entropy equation equilibrium excluded volume experimental experiments exponent factor Flory Flory-Huggins Flory-Huggins theory fluctuations fractal dimension free chains free energy Gaussian gelation Heidelberg 1989 interaction parameter isotropic labelled paths length linear Macromolecules macroscopic melt modulus molecular weight monomers network chains Networks Springer-Verlag Berlin neutron scattering observed obtained P.G. de Gennes PDMS chains phantom network Phys Picot Molecular Basis polybutadiene polyelectrolyte Polymer Networks Springer-Verlag polymeric fractals Proceedings in Physics radius of gyration ratio relaxation sample scaling solution solvent Springer Proceedings star molecules structure swelling swollen temperature theory topological uniaxial values vector viscoelastic volume fraction