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The Integrated Deconvolution Estimation Model: A Parameter Estimation Method for Ethylene/ α ‐Olefin Copolymers Made with Multiple‐Site Catalysts
Author(s) -
AlSaleh Mohammad A.,
Soares João B. P.,
Duever Thomas A.
Publication year - 2010
Publication title -
macromolecular reaction engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.37
H-Index - 32
eISSN - 1862-8338
pISSN - 1862-832X
DOI - 10.1002/mren.201000009
Subject(s) - reactivity (psychology) , deconvolution , copolymer , ethylene , olefin fiber , fraction (chemistry) , catalysis , polymer chemistry , chemistry , materials science , mathematics , organic chemistry , statistics , polymer , medicine , alternative medicine , pathology
The integrated deconvolution estimation model (IDEM) to estimate the microstructural parameters of polyolefins made with multiple‐site catalysts is described. IDEM estimates ethylene/ α ‐olefin reactivity ratios for each site type in two‐steps. In the first step, the MWD of the whole copolymer is deconvoluted into several Flory's most probable distributions, to determine the number of site types and the weight fraction of copolymer made on each of them. In the second estimation step, the model deconvolutes the CSLD of the copolymer into its individual components per site type, and estimates their respective reactivity ratios. This is the first time that MWD and CSLD information is integrated to estimate the reactivity ratios of polyolefins made with multiple‐site catalysts.