Solvent effects on acrylate kpin organic media? - A systematic PLP-SEC study

Haehnel, A. P., Wenn, B., Kockler, K., Bantle, T., Misske, A. M., Fleischhaker, F., Junkers, T., & Barner-Kowollik, C. (2014) Solvent effects on acrylate kpin organic media? - A systematic PLP-SEC study. Macromolecular Rapid Communications, 35(23).

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The Arrhenius parameters of the propagation rate coefficient, kp, are determined employing high-frequency pulsed laser polymerization-size exclusion chromatography (PLP-SEC) for the homologous series of five linear alkyl acrylates (i.e., methyl acrylate (MA), butyl acrylate (BA), dodecyl acrylate (DA), stearyl acrylate (SA), and behenyl acrylate (BeA)) in 1 M solution in butyl acetate (BuAc) as well as in toluene. The comparison of the obtained kp values with the literature known values for bulk demonstrates that no significant solvent influence neither in BuAc nor in toluene on the propagation reaction compared to bulk is detectable. Concomitantly, the kp values in toluene and in BuAc solution display a similar increase with increasing number of C-atoms in the ester side chain as was previously reported for the bulk systems. These findings are in clear contrast to earlier studies, which report a decrease of kp with increasing ester side chain length in toluene. The additional investigation of the longest and shortest ester side chain acrylate (i.e., BeA and MA) over the entire experimentally available concentration range at one temperature (i.e., 50 °C) does not reveal any general concentration dependence and all observed differences in the kp are within the experimental error. (Graph Presented). © 2014 Wiley-VCH Verlag GmbH & Co. KGaA.

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ID Code: 99386
Item Type: Journal Article
Refereed: Yes
Additional Information: Cited By :6
Export Date: 5 September 2016
Correspondence Address: Junkers, T.; Polymer Reaction Design Group, Institute for Materials Research (IMO-IMOMEC), Universiteit Hasselt, Agoralaan Building D, Belgium
Chemicals/CAS: acrylic acid, 10344-93-1, 79-10-7; acrylic acid methyl ester, 96-33-3; Acrylates; acrylic acid; methyl acrylate; n-butyl acrylate; Solvents
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Keywords: Arrhenius parameters, Free radical polymerization, Kinetics, PLP-SEC, Solvent effects, Acrylic monomers, Acrylics, Chains, Enzyme kinetics, Esterification, Esters, Free radicals, Organic solvents, Size exclusion chromatography, Solvents, Toluene, Concentration dependence, Concentration ranges, Propagation rate coefficient, Propagation reaction, Pulsed laser polymerization, acrylic acid, acrylic acid derivative, acrylic acid methyl ester, n-butyl acrylate, solvent, chemistry, Acrylates
DOI: 10.1002/marc.201400479
ISSN: 10221336
Divisions: Current > Schools > School of Chemistry, Physics & Mechanical Engineering
Current > Institutes > Institute for Future Environments
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Deposited On: 22 Sep 2016 04:50
Last Modified: 27 Sep 2016 03:30

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