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Polydisperse polymers: Relations among molecular weight distribution, stress relaxation, and distribution of relaxation times
Author(s) -
Menefee E.
Publication year - 1972
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1972.070160906
Subject(s) - viscoelasticity , polymer , shearing (physics) , relaxation (psychology) , stress relaxation , molar mass distribution , thermodynamics , viscosity , mixing (physics) , materials science , distribution (mathematics) , polymer chemistry , statistical physics , physics , mathematics , mathematical analysis , composite material , psychology , social psychology , creep , quantum mechanics
Relaxation times in polydisperse polymers were calculated on the basis of more realistic viscosity mixing rules than have previously been used. These relaxation times and mixing rules are in turn used to calculate viscoelastic functions such as stress relaxation following sudden straining or steady shearing. Inversion of these functions provides an accurate way to estimate the molecular weight distribution. This method is useful for insoluble or otherwise intractable polymers.