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An analysis of the rheology of polypropylene below its melting point
Author(s) -
Funt John M.
Publication year - 1975
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.760151109
Subject(s) - materials science , rheology , creep , composite material , constitutive equation , polypropylene , uniaxial tension , elasticity (physics) , melting point , shear (geology) , planar , deformation (meteorology) , ultimate tensile strength , thermodynamics , computer science , finite element method , physics , computer graphics (images)
Three sets of data for the deformation of crystalline poly‐propylene in uniaxial tensile tests and uniaxial creep, in equal biaxial creep and in planar shear are examined. The methods of analysis used in the original papers, all based on variants of linear elasticity, are critically evaluated, and a constitutive equation based on the theory of a simple fluid with memory is proposed.