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Polymer Chain Deformation in Stretched and Swollen Elastomers

Published online by Cambridge University Press:  26 February 2011

Robert Ullman
Robert Ullman*
Affiliation:
Department of Nuclear Engineering, University of Michigan Ann Arbor, MI 48109-2104
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Abstract

In the early theories of rubber elasticity, the retractive force and change in free energy of a stretched specimen were calculated from the deformation of the polymer chains of which the rubber network was formed. The mean chain deformation was presumed to be the same as that of the macroscopic specimen, an assumption which seemed reasonable, but could not be confirmed experimentally. Small angle neutron scattering (SANS) made measurement of chain dimensions possible, and it was soon discovered [1], [2] that the actual relation between dimensional changes of the polymer chain and deformation of the specimen was not at all what had been assumed.

SANS studies of carefully prepared elastomeric networks provide the most direct experimental information required for a molecular theory of rubber elasticity, and have stimulated many new developments.

Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 79: Symposium F – Scattering, Deformation and Fracture in Polymers , 1986 , 225
Copyright
Copyright © Materials Research Society 1987

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