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Model Theory of Visco‐Elastic Properties and Relaxation Spectra of Two Different Interpenetrating Polymer Networks
Author(s) -
Gotlib Yuli Ya.,
Torchinskii Isaak A.,
Toshchevikov Vladimir P.,
Shevelev Vladimir A.
Publication year - 2009
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/masy.200950412
Subject(s) - viscoelasticity , relaxation (psychology) , rigidity (electromagnetism) , spectrum (functional analysis) , physics , spectral line , stress relaxation , statistical physics , topology (electrical circuits) , polymer , classical mechanics , mathematics , thermodynamics , nuclear magnetic resonance , quantum mechanics , kinetics , combinatorics , psychology , social psychology
Dynamic viscoelastic models of the system of two different interpenetrating polymer networks with different topology and type of interactions were used for calculating spectra of relaxation times of the system under consideration. It was shown, that two branches of the relaxation spectrum appear for two models of interpenetrating networks with different components. One of the branches is the branch of the collective motion of double network consisting of two initial interacting networks. Parameters of this branch of relaxation spectrum are defined by both own elastic constants of each of interacting networks and by effective quasi‐elastic interactions between two networks. This branch is the low frequency one and is described by broad relaxation time spectrum. The second branch is the high frequency one and characterizes mutual local motions of two interacting networks. The relaxation spectrum of this branch is comparatively narrow and depends on the quasi‐elastic constants and mutual friction which is defined by the entanglements of the networks and by its effective rigidity. The second branch does not contain extremely large relaxation times for infinitely large networks.