Hydrogen bonding in radical solution copolymerization kinetics of acrylates and methacrylates: a comparison of hydroxy- and methoxy-functionality
Loading...
Authors
Schier, Jan E. S.
Cohen-Sacal, David
Hutchinson, Robin A
Date
2017-03-21
Type
journal article
Language
Keyword
Alternative Title
Abstract
The pulsed-laser polymerization technique in combination with size exclusion chromatography and nuclear magnetic resonance is used to study the influences of solvent choice and monomer structure on the copolymerization propagation kinetics of 2-hydroxyethyl acrylate (HEA) and 2-methoxyethyl acrylate (MEA). The similarity in the monomer structures provides a means to isolate the influence of H-bonding, which increases the incorporation of HEA into copolymer relative to that of butyl acrylate (BA) dependent on solvent choice. The copolymer-averaged propagation rate coefficient, kcopp, for HEA/BA is also increased over that of BA homopropagation, and is highly influenced by solvent choice. In contrast, MEA copolymerized with butyl acrylate (BA) and butyl methacrylate (BMA) in multiple solvents revealed classic behaviour, with no solvent effects exerted on kcopp or reactivity ratios other than the increase of kcopp in n-butanol (BuOH). The value of kMEAp was determined to be 35 000 L mol−1 s−1 at 50 °C, 30% higher than the value for BA. In a simplified modelling approach, penultimate-unit parameters for BMA/BA were used to represent the evolution of kcopp for BMA/MEA in bulk.
Description
Final publication available at: http://dx.doi.org/10.1039/C7PY00185A
Citation
Schier, J. E. S., Cohen-Sacal, D., & Hutchinson, R. A. (2017). Hydrogen bonding in radical solution copolymerization kinetics of acrylates and methacrylates: a comparison of hydroxy- and methoxy-functionality. Polymer Chemistry, 8(12), 1943–1952. doi:10.1039/c7py00185a
Publisher
Royal Society of Chemistry (RSC)