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Evaluation of steady‐state flow curves from model molecular weight distributions
Author(s) -
Cote J. A.,
Shida M.
Publication year - 1973
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.1973.070170601
Subject(s) - skewness , flow (mathematics) , steady state (chemistry) , distribution (mathematics) , molar mass distribution , simple (philosophy) , thermodynamics , mathematics , statistical physics , mechanics , physics , chemistry , statistics , mathematical analysis , polymer , nuclear magnetic resonance , philosophy , epistemology
Graessley's theory of entanglement was applied to several model distributions. The distribution functions chosen were such that the differential weight distributions were triangular with respect to a log molecular weight axis. The molecular weight level, breadth of the molecular weight distribution, skewness, and blending of simple distributions were studied in their effect on the steady‐state flow curve. The governing factor for the shape of the reduced flow curve was shown to be M̄ z +1 · M̄ z / M̄ w 2 . Other general features of the flow curve predicted by Graessley's theory were discussed.