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 66
... temperature T above the glass transition temperature Tg = 100 ° C in order to put the chains in the liquid state . Then the sample has the properties of an elastomer . We deform it by stretching , then maintain it at constant length for ...
... temperature T above the glass transition temperature Tg = 100 ° C in order to put the chains in the liquid state . Then the sample has the properties of an elastomer . We deform it by stretching , then maintain it at constant length for ...
Page 159
... temperature or ionic content and ( ii ) that the non- electrostatic contribution to the helix propagation step may be decomposed as Aμnon - el = AH2 non - el + TAS non - el , ( 2 ) where AHnon - cl and AS non - el are constants ...
... temperature or ionic content and ( ii ) that the non- electrostatic contribution to the helix propagation step may be decomposed as Aμnon - el = AH2 non - el + TAS non - el , ( 2 ) where AHnon - cl and AS non - el are constants ...
Page 164
... temperature of a wavelength = 632 nm observed with the mechanical properties of the system on cooling and heating . Therefore the gel state is influenced by the thermal prehistory which is similar to the behaviour of glasses [ 2 ] . In ...
... temperature of a wavelength = 632 nm observed with the mechanical properties of the system on cooling and heating . Therefore the gel state is influenced by the thermal prehistory which is similar to the behaviour of glasses [ 2 ] . In ...
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