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Please use this identifier to cite or link to this item: http://hdl.handle.net/1942/21674

Title: Determining Free-Radical Propagation Rate Coefficients with High-Frequency Lasers: Current Status and Future Perspectives
Authors: Kockler, Katrin B.
Haehnel, Alexander P.
Junkers, Thomas
Barner-Kowollik, Christopher
Issue Date: 2016
Abstract: Detailed knowledge of the polymerization mechanisms and kinetics of academically and industrially relevant monomers is mandatory for the precision synthesis of tailor-made polymers. The IUPAC-recommended pulsed-laser polymerization-size exclusion chromatography (PLP-SEC) approach is the method of choice for the determination of propagation rate coefficients and the associated Arrhenius parameters for free radical polymerization processes. With regard to specific monomer classes-such as acrylate-type monomers, which are very important from a materials point of view-high laser frequencies of up to 500 Hz are mandatory to prevent the formation of mid-chain radicals and the occurrence of chain-breaking events by chain transfer, if industrially relevant temperatures are to be reached and wide temperature ranges are to be explored (up to 70 degrees C). Herein the progress and state-of-the-art of high-frequency PLP-SEC with pulse repetition rates of 500 Hz is reported, with a critical collection of to-date investigated 500 Hz data as well as future perspectives for the field.
Notes: [Kockler, Katrin B.; Haehnel, Alexander P.; Barner-Kowollik, Christopher] Karlsruhe Inst Technol, Inst Tech Chem & Polymerchem, Preparat Macromol Chem, Engesserstr 18, D-76128 Karlsruhe, Germany. [Kockler, Katrin B.; Haehnel, Alexander P.; Barner-Kowollik, Christopher] Karlsruhe Inst Technol, Inst Biol Grenzflachen, Hermann von Helmholtz Pl 1, D-76344 Karlsruhe, Germany. [Junkers, Thomas] Univ Hasselt, Inst Mat Res, Polymer React Design Grp, Martelarenlaan 42, B-3500 Hasselt, Belgium. [Junkers, Thomas] IMEC Associated Lab IMOMEC, Wetenschapspk 1, B-3590 Diepenbeek, Belgium. [Haehnel, Alexander P.] Freudenberg New Technol SE & Co KG, Hohnerweg 2-4, D-69469 Weinheim, Germany.
URI: http://hdl.handle.net/1942/21674
DOI: 10.1002/marc.201500503
ISI #: 000369833200001
ISSN: 1022-1336
Category: A1
Type: Journal Contribution
Validation: ecoom, 2017
Appears in Collections: Research publications

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