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Prediction of polyethylene melt rheological properties from molecular weight distribution data obtained by gel permeation chromatography
Author(s) -
Shah Basit H.,
Darby Ron
Publication year - 1976
Publication title -
polymer engineering and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.503
H-Index - 111
eISSN - 1548-2634
pISSN - 0032-3888
DOI - 10.1002/pen.760160810
Subject(s) - rheology , gel permeation chromatography , materials science , polyethylene , molar mass distribution , shear (geology) , linear low density polyethylene , range (aeronautics) , viscosity , high density polyethylene , composite material , polymer
A method is presented for predicting rheological characteristics, such as shear dependent (non‐Newtonian) viscosity and components of linear oscillatory (complex) response functions for polyethylene melts from molecular weight distribution data obtained from gel permeation chromatographic (GPC) analysis. The results are compared with measured values of the rheological functions obtained from a variety of instruments over an extensive range of shear rates‐and frequencies. The agreement between predicted and measured rheological functions is quite good for high density resins. However, for a low density resin the agreement is not as good, although still reasonable over a considerable range of conditions. It is concluded that the quality of the GPC data is the key factor in the degree of success of the method.