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Modeling the Chain‐Length Differentiated Polymer Microstructure of α ‐Olefins
Author(s) -
Busch Markus,
Becker Katrin
Publication year - 2007
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/masy.200751334
Subject(s) - branching (polymer chemistry) , polymer , chain transfer , molar mass distribution , fractionation , monomer , size exclusion chromatography , polymerization , materials science , polymer chemistry , microstructure , kinetic chain length , gel permeation chromatography , chemical engineering , chemistry , biological system , organic chemistry , radical polymerization , composite material , engineering , biology , enzyme
Summary: Due to a complex polymerization scheme, incorporating besides propagation, termination and transfer to monomer and chain transfer agents in addition intra‐ and inter‐molecular transfer to polymer as well as β ‐scission, α ‐olefin (co)polymers feature a quite complex polymeric microstructure. It is demanding to design a kinetic model that describes these in a predictive manner in order to have a tool for computer‐aided product design. The molecular weight distribution and branching indices together with the composition are the subjects of interest in this case. The latter quantities are often provided as being averaged over the molecular weight distribution. Modern coupled analytical techniques of size exclusion chromatography provide even more insight. The combination of size exclusion chromatography with fractionation techniques provide under adequate processing of the data branching indices and co‐polymer composition differentiated with respect to chain‐lengths. This contribution will inspect how good a model for predicting the chain‐length differentiated co‐polymer composition in high‐pressure high‐temperature ethene – vinyl acetate‐ co ‐polymerizations will coincide with analytical results of technical products.