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Characterization of polymer molecular mass distribution from rheological measurements
Author(s) -
Fleissner M.
Publication year - 1992
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.19920610126
Subject(s) - rheology , viscoelasticity , polymer , molecular mass , homologous series , materials science , mass distribution , molar mass distribution , viscosity , shear modulus , dynamic modulus , dynamic mechanical analysis , thermodynamics , analytical chemistry (journal) , composite material , chemistry , chromatography , organic chemistry , physics , quantum mechanics , galaxy , enzyme
Various methods for the determination of molecular mass distribution from rheological measurements of polymer melts are introduced. Shear viscosity, entrance pressure loss, recoverable shear, and in particular the dynamic viscoelasticity data G' and G” are discussed as analytical tools to evaluate the molecular mass distribution. Well characterized samples and homologous series of the polymers PS, PE‐HD, PP, and PTFE were measured to check the methods. Precise and reliable results can be obtained by calculating the molecular mass distribution from the frequency dependence of the storage modulus.