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dc.contributor.authorIdowu, Loretta A.en
dc.contributor.authorHutchinson, Robin Aen
dc.identifier.citationIdowu, L., & Hutchinson, R. (2019). Solvent Effects on Radical Copolymerization Kinetics of 2-Hydroxyethyl Methacrylate and Butyl Methacrylate. Polymers, 11(3), 487. doi:10.3390/polym11030487en
dc.descriptionFinal publication available at:
dc.description.abstract2-Hydroxyethyl methacrylate (HEMA) is an important component of many acrylic resins used in coatings formulations, as the functionality ensures that the chains participate in the cross-linking reactions required to form the final product. Hence, the knowledge of their radical copolymerization kinetic coefficients is vital for both process and recipe improvements. The pulsed laser polymerization (PLP) technique is paired with size exclusion chromatography (SEC) and nuclear magnetic resonance (NMR) to provide kinetic coefficients for the copolymerization of HEMA with butyl methacrylate (BMA) in various solvents. The choice of solvent has a significant impact on both copolymer composition and on the composition-averaged propagation rate coefficient (kp,cop). Compared to the bulk system, both n-butanol and dimethylformamide reduce the relative reactivity of HEMA during copolymerization, while xylene as a solvent enhances HEMA reactivity. The magnitude of the solvent effect varies with monomer concentration, as shown by a systematic study of monomer/solvent mixtures containing 50 vol%, 20 vol%, and 10 vol% monomer. The observed behavior is related to the influence of hydrogen bonding on monomer reactivity, with the experimental results fit using the terminal model of radical copolymerization to provide estimates of reactivity ratios and kp,HEMA.en
dc.description.sponsorshipCanadian Network for Research and Innovation in Machining Technology, Natural Sciences and Engineering Research Council of Canada: Discoveryen
dc.description.sponsorshipAxalta Coating Systems: Research Fundingen
dc.publisherMDPI AGen
dc.subjectRadical Polymerizationen
dc.subjectHydrogen Bondingen
dc.subject2-Hydroxyethyl Methacrylateen
dc.subjectPolymerization Kineticsen
dc.subjectRadical Propagationen
dc.subjectReactivity Ratiosen
dc.subjectSolvent Effectsen
dc.titleSolvent Effects on Radical Copolymerization Kinetics of 2-Hydroxyethyl Methacrylate and Butyl Methacrylateen
dc.typejournal articleen

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