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Effect of Reaction Conditions and Catalyst Design on the Rheological Properties of Polyolefins Produced in Gas‐Phase Olefin Polymerization Reactors
Author(s) -
Pladis P.,
Kanellopoulos V.,
Chatzidoukas C.,
Kiparissides C.
Publication year - 2008
Publication title -
macromolecular theory and simulations
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.37
H-Index - 56
eISSN - 1521-3919
pISSN - 1022-1344
DOI - 10.1002/mats.200800047
Subject(s) - rheology , polymerization , materials science , polymer , viscoelasticity , chemical engineering , olefin fiber , polymer chemistry , phase (matter) , thermodynamics , chemistry , organic chemistry , composite material , physics , engineering
Abstract A model is developed to predict the viscoelastic behavior of polyolefins produced in catalytic polymerization reactors. The approach is based on the solution of different sub‐models (e.g., a kinetic model, a single particle model, a macroscopic reactor model and a rheological model). From the calculated rheological curve, the polymer melt index is determined. The ability of the proposed model to predict the viscoelastic behavior of linear polymer melts quantitatively is examined for the operation of a catalytic olefin polymerization cascade‐loop reactor process. In addition, the transient rheological properties of polyolefins produced in a Ziegler‐Natta gas‐phase olefin polymerization fluidized‐bed reactor are calculated.