Aluminum trifate‑cocatalyzed radical copolymerization of styrene and ethyl acrylate
Various random copolymers, poly(styrene-co-ethyl acrylate), were synthesized by free radical bulk copolymerization cocatalyzed by aluminum trifate (Al(OTf)3). The experimental conditions for the polymerization reactions, which include the amount of cocatalyst, polymerization time and ratio of st...
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Springer
2021
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| Online Access: | https://doi.org/10.1007/s00289-019-02847-3 http://hdl.handle.net/11408/4620 |
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| author | Guyo, Upenyu Otto, Daniel P. Young, Desmond A. Vosloo, Hermanus C. M. |
| author_facet | Guyo, Upenyu Otto, Daniel P. Young, Desmond A. Vosloo, Hermanus C. M. |
| author_sort | Guyo, Upenyu |
| collection | DSpace |
| description | Various random copolymers, poly(styrene-co-ethyl acrylate), were synthesized by
free radical bulk copolymerization cocatalyzed by aluminum trifate (Al(OTf)3). The
experimental conditions for the polymerization reactions, which include the amount of cocatalyst, polymerization time and ratio of styrene to ethyl acrylate, were investigated. The copolymer molecular weights were determined by gel permeation chromatography coupled to multi-angle laser light scattering. Compositional analysis was performed using proton nuclear magnetic resonance spectrometry. Electron paramagnetic resonance spectroscopy was also used to study the radical species which form in the presence or absence of Al(OTf)3. Kinetic studies were performed by determining monomer conversions as a function of time on gas chromatography. It was found that Al(OTf)3 accelerated the rate of polymerization signifcantly while also increasing the polymer molecular weights for a given conversion compared to the reactions where the trifate was absent. Al(OTf)3 can be a signifcantly more cost-efective and abundant alternative polymerization cocatalyst compared to some of the rare lanthanide trifates. |
| format | Article |
| id | ir-11408-4620 |
| institution | My University |
| language | English |
| publishDate | 2021 |
| publisher | Springer |
| record_format | dspace |
| spelling | ir-11408-46202022-06-27T13:49:06Z Aluminum trifate‑cocatalyzed radical copolymerization of styrene and ethyl acrylate Guyo, Upenyu Otto, Daniel P. Young, Desmond A. Vosloo, Hermanus C. M. Copolymerization Ethyl acrylate Styrene Aluminum trifate Radical stability Various random copolymers, poly(styrene-co-ethyl acrylate), were synthesized by free radical bulk copolymerization cocatalyzed by aluminum trifate (Al(OTf)3). The experimental conditions for the polymerization reactions, which include the amount of cocatalyst, polymerization time and ratio of styrene to ethyl acrylate, were investigated. The copolymer molecular weights were determined by gel permeation chromatography coupled to multi-angle laser light scattering. Compositional analysis was performed using proton nuclear magnetic resonance spectrometry. Electron paramagnetic resonance spectroscopy was also used to study the radical species which form in the presence or absence of Al(OTf)3. Kinetic studies were performed by determining monomer conversions as a function of time on gas chromatography. It was found that Al(OTf)3 accelerated the rate of polymerization signifcantly while also increasing the polymer molecular weights for a given conversion compared to the reactions where the trifate was absent. Al(OTf)3 can be a signifcantly more cost-efective and abundant alternative polymerization cocatalyst compared to some of the rare lanthanide trifates. 2021-11-30T10:39:54Z 2021-11-30T10:39:54Z 2019 Article 0170-0839 1436-2449 https://doi.org/10.1007/s00289-019-02847-3 http://hdl.handle.net/11408/4620 en Polymer Bulletin; open Springer |
| spellingShingle | Copolymerization Ethyl acrylate Styrene Aluminum trifate Radical stability Guyo, Upenyu Otto, Daniel P. Young, Desmond A. Vosloo, Hermanus C. M. Aluminum trifate‑cocatalyzed radical copolymerization of styrene and ethyl acrylate |
| title | Aluminum trifate‑cocatalyzed radical copolymerization of styrene and ethyl acrylate |
| title_full | Aluminum trifate‑cocatalyzed radical copolymerization of styrene and ethyl acrylate |
| title_fullStr | Aluminum trifate‑cocatalyzed radical copolymerization of styrene and ethyl acrylate |
| title_full_unstemmed | Aluminum trifate‑cocatalyzed radical copolymerization of styrene and ethyl acrylate |
| title_short | Aluminum trifate‑cocatalyzed radical copolymerization of styrene and ethyl acrylate |
| title_sort | aluminum trifate‑cocatalyzed radical copolymerization of styrene and ethyl acrylate |
| topic | Copolymerization Ethyl acrylate Styrene Aluminum trifate Radical stability |
| url | https://doi.org/10.1007/s00289-019-02847-3 http://hdl.handle.net/11408/4620 |
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