Abstract
Uniaxial stress-strain properties of highly swollen and stretched rubbers are discussed in the framework of a recently developed non-Gaussian network model that considers the finite extensibility of network chains together with topological chain constraints. The finite extensibility is described by the well-known inverse Langevin function of the network chain end-to-end distance. The model consequently distinguishes between topological constraints coming from packing effects of neighboring chains and from trapped entanglements. Whereas the latter act as additional network junctions, the packing effects are modeled in a mean-field-like manner through strain-dependent conformational tubes
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