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A method for determining the melt elasticity in capillary flow
Author(s) -
Han C. D.,
Charles M.
Publication year - 1970
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.760100304
Subject(s) - materials science , capillary action , polypropylene , elasticity (physics) , polyethylene , polymer , capillary pressure , residual , composite material , mechanics , flow (mathematics) , melt flow index , computer science , algorithm , physics , porous medium , porosity , copolymer
A method for determining the melt elasticity is developed. The method requires the measurement of axial pressure distribution in a capillary and makes use of the extrapolated value of the pressure at the exit of a capillary, the so‐called “residual pressure.” The same measurement also provides data for determining the flow curve. Measurements were taken with polyethylene and polypropylene. The results are presented and discussed with particular emphasis on the application of the method to various ways of processing polymers.