## Molecular basis of polymer networks: proceedings of the 5th IFF-Ill Workshop, Jülich, Fed. Rep. of Germany, October 5-7, 1988The contributors to this volume appraise our knowledge of the molecular physics of polymer networks and pinpoint areas of research where significant advances can be made using new theories and techniques. They describe both theoretical approaches, based on new theoretical concepts and original network models, and recent experimental investigations using SANS, 2H NMR or QELS. These new techniques provide precise information about network behaviour at the molecular level. Reported results of the application of these and more traditional techniques include the microscopic conformation and properties of permanent networks or gels formed by specific interchain interactions, the behaviour of elastomer liquid crystals, and the static and dynamic properties of star-branched polymers. |

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Page 200

The melt measurements show that the Bcnoit scattering function, based on a

random-walk model, gives an extremely good fit to the neutron scattering data,

but the molecules are swollen with respect to a simple Gaussian conformation.

The swelling is consistent with a model of an impenetrable core from which the

arms of the star diffuse outwards. In the thcla solvent, the

swollen compared to those in the melt. The swelling increases with the number of

arms, but is ...

The melt measurements show that the Bcnoit scattering function, based on a

random-walk model, gives an extremely good fit to the neutron scattering data,

but the molecules are swollen with respect to a simple Gaussian conformation.

The swelling is consistent with a model of an impenetrable core from which the

arms of the star diffuse outwards. In the thcla solvent, the

**star molecules**areswollen compared to those in the melt. The swelling increases with the number of

arms, but is ...

Page 206

Rep. of Germany We report on static and dynamic neutron small angle scattering

experiments on

partial deuteration it was possible to investigate also the structure and dynamics

of designated parts of these

architecture and dynamic response was observed. In particular we found a

pronounced minimum in the Q-dependence of the reduced

Rep. of Germany We report on static and dynamic neutron small angle scattering

experiments on

**star**polymers of different functionality and molecular weight. Bypartial deuteration it was possible to investigate also the structure and dynamics

of designated parts of these

**molecules**. In all cases a strong relation between**star**architecture and dynamic response was observed. In particular we found a

pronounced minimum in the Q-dependence of the reduced

**star**relaxation rates.Page 217

the mean end to end distance squared of the arms in a star with k polymers. The

variables ak are thus completely specified upon specification of the statistics of

the arms of the

disregarding excluded volume effects, and evaluate (*} — ToV'To explicitly. The

inclusion of these excluded volume effects will be treated in section 4. 3

of the star ...

the mean end to end distance squared of the arms in a star with k polymers. The

variables ak are thus completely specified upon specification of the statistics of

the arms of the

**star molecules**. In the next section we will further specify jkdisregarding excluded volume effects, and evaluate (*} — ToV'To explicitly. The

inclusion of these excluded volume effects will be treated in section 4. 3

**Star****molecules**with non-interacting arms In order to calculate the statistical propertiesof the star ...

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### Contents

Remarks | 2 |

Statistical Mechanics of dDimensional Polymer Networks and Exact | 17 |

FluctuationInduced Deformation Dependence of the FloryHuggins | 35 |

Copyright | |

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### Common terms and phrases

anisotropy Basis of Polymer Bastide behaviour blends calculated carrageenan chain segments Chem chemical chemical potential configuration conformation constant constraints corresponding crosslinking curves deformation density dependence deswelling deuterated deviatoric distribution dynamics Editors effect elastic free energy elementary strand elongation entanglements entropy equation equilibrium excluded volume experimental experiments exponent factor Flory Flory-Huggins fluctuations fractal dimension free chains free energy Gaussian gelation Gennes 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 polyelectrolyte Polymer Networks polymeric fractals polystyrene Proceedings in Physics properties radius of gyration ratio reptation rod network Rouse model rubber elasticity sample scaling solution solvent Springer Proceedings star molecules star polymers structure surface swelling swollen temperature theory topological uniaxial values vector viscoelastic viscosity volume fraction