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On the uniaxial stress‐strain dependence of highly swollen chemically crosslinked networks
Author(s) -
Zrinyi M.,
Kilian H.G.,
Horkay F.
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.19890300117
Subject(s) - van der waals force , excluded volume , gaussian , volume (thermodynamics) , materials science , stress (linguistics) , thermodynamics , statistical physics , physics , polymer science , chemical physics , polymer , molecule , composite material , quantum mechanics , philosophy , linguistics
Many experiments show that the second Mooney‐Rivlin coefficient disappears for highly swollen chemically cross‐linked gels. Hence we are led to a paradox: Highly swollen gels seem to behave phenomenologically like phantom networks. Due to the finite extensibility of network chains, entanglements and excluded volume effects, one should ‐on the contrary‐ expect non‐Gaussian behaviour. On the basis of the phenomenological van der Waals equation of state, we have concluded that the virtual ideality of highly swollen gels is the consequence of a compensation between global interactions and excluded volume effects.