منابع مشابه
Thermal fluctuations and rubber elasticity.
The effects of thermal elastic fluctuations in rubbery materials are examined. It is shown that, due to their interplay with the incompressibility constraint, these fluctuations qualitatively modify the large-deformation stress-strain relation, compared to that of classical rubber elasticity. To leading order, this mechanism provides a simple and generic explanation for the peak structure of Mo...
متن کامل~ 1 Rubber Elasticity : BasicConcepts and Behavior
The single most important property of elastomers—that from which their name derives—is their ability to undergo large elastic deformations, that is, to stretch and return to their original shape in a reversible way. Theories to account for this characteristic high elasticity have passed through three distinct phases: the early development of a molecular model relating experimental observations ...
متن کاملNonaffine rubber elasticity for stiff polymer networks.
We present a theory for the elasticity of cross-linked stiff polymer networks. Stiff polymers, unlike their flexible counterparts, are highly anisotropic elastic objects. Similar to mechanical beams, stiff polymers easily deform in bending, while they are much stiffer with respect to tensile forces ("stretching"). Unlike in previous approaches, where network elasticity is derived from the stret...
متن کاملNon-entropic theory of rubber elasticity: flexible chains grafted on a rigid surface
The elastic response is studied of (i) a single flexible chain grafted on a rigid plane and (ii) an ensemble of non-interacting tethered chains. It is demonstrated that the entropic theory of rubber elasticity leads to conclusions that disagree with experimental data. A modification of the conventional approach is proposed, where the end-to-end distribution function (treated as the governing pa...
متن کاملNon-entropic theory of rubber elasticity: flexible chains with weak excluded-volume interactions
Strain energy density is calculated for a network of flexible chains with weak excluded-volume interactions (whose energy is small compared with thermal energy). Constitutive equations are developed for an incompressible network of chains with segment interactions at finite deformations. These relations are applied to the study of uniaxial and equi-biaxial tension (compression), where the stres...
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ژورنال
عنوان ژورنال: Polymer Journal
سال: 1985
ISSN: 0032-3896,1349-0540
DOI: 10.1295/polymj.17.1