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Rheology and processing of linear low density polyethylene resins as affected by alpha‐olefin comonomers
Author(s) -
Kalyon Dilhan M.,
Yu DongWoo,
Moy Francis H.
Publication year - 1988
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.760282304
Subject(s) - materials science , linear low density polyethylene , rheology , extensional viscosity , composite material , polyethylene , shear stress , stress relaxation , extrusion , shear (geology) , stress (linguistics) , high density polyethylene , environmental stress cracking , polymer chemistry , shear viscosity , creep , linguistics , philosophy , alloy , stress corrosion cracking
The effects of the higher alpha‐olefin comonomers on the rheology and processing behavior of linear low density polyethylenes were investigated. Four linear low density polyethylene resins polymerized with butene, hexene and octene comonomers and a low density polyethylene were characterized in terms of their shear viscosity, first normal stress difference, storage and loss moduli, shear stress growth, stress relaxation upon step strain, stress relaxation upon the cessation of steady shear, and uniaxial extensional stress growth material functions. Differences in first normal stress difference, relaxation moduli, damping function parameters, and uniaxial extensional stress growth behavior were noted. The observations were elucidated in terms of the processability considerations in blown film extrusion process.