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An alternative approach to rubber elasticity theory based on a lattice model
Author(s) -
Schwarz Jürgen
Publication year - 1989
Publication title -
makromolekulare chemie. macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 0258-0322
DOI - 10.1002/masy.19890300121
Subject(s) - elastomer , rubber elasticity , materials science , elasticity (physics) , homogeneous , natural rubber , lattice (music) , thermodynamics , condensed matter physics , statistical physics , composite material , physics , acoustics
An alternative rubber elasticity theory for bulk elastomers has been developed. It is based on the model of a cubic lattice which is filled completely with long flexible chains. The dependence of the configurational entropy on the orientation factor of Hermans has been derived for a uniaxial homogeneous orientation of the system. With the assumption of a constant stress‐optical coefficient, the dependence of the true stress Γ on the deformation λ = L/L 0 , with L the length of the sample, can be described approximately as τ ∝ in λ both for uniaxial extension and compression, which agrees quite well with experimental results on bulk elastomers.