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Molecular Architecture of Multi‐Block Polymer Synthesized in a Dual‐Catalyst Single CSTR
Author(s) -
Konstantinov Ivan,
Villa Carlos,
Karjala Tom,
Jain Pradeep
Publication year - 2017
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.201600047
Subject(s) - dispersity , catalysis , continuous stirred tank reactor , copolymer , polymer , polymer chemistry , residence time distribution , materials science , residence time (fluid dynamics) , polymer architecture , macromolecule , chain (unit) , kinetics , molar mass distribution , dual (grammatical number) , chemical engineering , chemistry , thermodynamics , organic chemistry , physics , composite material , inclusion (mineral) , art , literature , biochemistry , geotechnical engineering , quantum mechanics , astronomy , engineering
This work aims at deriving analytical solutions for the molecular architecture of multi‐block polymer synthesized in a dual‐catalyst single CSTR. While the relevant equations are developed for homopolymerization, they can easily be extended to copolymerization. Special emphasis is placed on the quantities associated with each catalyst rather than the overall ones. However, if all rate parameters are available, the expressions can be used to calculate the properties of the material made by each catalyst as well as the overall ones under various process conditions. Given the reasonable assumption of large residence time, the solutions are simplified to elucidate the kinetics of chain‐shuttling involving two catalysts. It is shown that systems with low chain‐shuttling ability, if DP P n,0 ≠ DP Q n,0 , may exhibit significant deviation from Flory's most probable distribution. Furthermore, systems with high chain‐shuttling ability produce macromolecules with more uniform architecture and polydispersity index close to 2.