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 109
... uniaxial around the direction of the applied constraint . Therefore the observed spectrum for λ 1 appears as the typical response of an uniaxial fluid medium . The corresponding degree of order S = < P ( cose ) > can be easily dedu- ced ...
... uniaxial around the direction of the applied constraint . Therefore the observed spectrum for λ 1 appears as the typical response of an uniaxial fluid medium . The corresponding degree of order S = < P ( cose ) > can be easily dedu- ced ...
Page 113
... uniaxial extension ( -1 < 1 ) and for uniaxial compression ( 2 - 1 > 1 ) . The experimental data are from measurements on PDMS networks ( see ( 20 ) , Fig.3 ; the solid line is computed with Eq . [ 5 ] with x 0.12 and Y = 0.004 ...
... uniaxial extension ( -1 < 1 ) and for uniaxial compression ( 2 - 1 > 1 ) . The experimental data are from measurements on PDMS networks ( see ( 20 ) , Fig.3 ; the solid line is computed with Eq . [ 5 ] with x 0.12 and Y = 0.004 ...
Page 115
... uniaxial dyna- mics , resulting in a nematic - like order , whose symmetry axis is in the stress direction [ 1 ] . - Probes introduced into the network ( which may be either conventional solvent molecules [ 2 ] or free PDMS chains [ 3 ] ...
... uniaxial dyna- mics , resulting in a nematic - like order , whose symmetry axis is in the stress direction [ 1 ] . - Probes introduced into the network ( which may be either conventional solvent molecules [ 2 ] or free PDMS chains [ 3 ] ...
Contents
Remarks | 2 |
Statistical Mechanics of dDimensional Polymer Networks and Exact | 17 |
FluctuationInduced Deformation Dependence of the FloryHuggins | 35 |
Copyright | |
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anisotropy Basis of Polymer Bastide behaviour bonds calculated carrageenan chain segments Chem chemical chemical potential concentration configuration conformation constraints correlations corresponding covalent covalent bonds crosslinking curves deformation density deswelling deuterated deviatoric distribution dynamics Editors effect elastic free energy elementary strand elongation entanglements entropy equation equilibrium EV interactions excluded volume experimental experiments exponent factor Flory fluctuations fractal dimension free chains free energy function Gaussian gelation Gennes increases interaction parameter isotropic labelled paths length linear Macromolecules macroscopic melt modulus Molecular Basis molecular weight monomers network chains neutron scattering observed obtained orientation PDMS chains phantom network Phys Picot points polybutadiene polyelectrolyte Polymer Networks polymeric fractals Proceedings in Physics radius of gyration ratio relaxation rubber elasticity sample scaling simulations solution solvent Springer Proceedings star molecules stress structure swelling swollen temperature theory topological uniaxial values vector Vilgis volume fraction