Rheology and processing of linear low density polyethylene resins as affected by alpha‐olefin comonomers

Dilhan M. Kalyon, Dong‐Woo ‐W Yu, Francis H. Moy

Research output: Contribution to journalArticlepeer-review

24 Scopus citations

Abstract

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.

Original languageEnglish
Pages (from-to)1542-1550
Number of pages9
JournalPolymer Engineering and Science
Volume28
Issue number23
DOIs
StatePublished - Dec 1988

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