Kinetics of Enzymatic Ring-Opening Polymerization of ε-Caprolactone in Supercritical Carbon Dioxide
The kinetics of enzymatic ring-opening polymerization (eROP) of ε-caprolactone in supercritical carbon dioxide (scCO2) was investigated using a new, high-pressure sampling autoclave. The polymerization was performed using Candida antarctica lipase B (CALB) as catalyst and was found to be approximate...
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American Chemical Society
2006
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ftunivqespace:oai:espace.library.uq.edu.au:UQ:162176 2023-05-15T13:55:31+02:00 Kinetics of Enzymatic Ring-Opening Polymerization of ε-Caprolactone in Supercritical Carbon Dioxide Thurecht, Kristofer J. Heise, Andreas deGeus, Matthijs Villarroya, Silvia Zhou, Jiaxiang Wyatt, Mark F. Howdle, Steven M. 2006-01-01 https://espace.library.uq.edu.au/view/UQ:162176 eng eng American Chemical Society doi:10.1021/ma061310q issn:0024-9297 orcid:0000-0002-4100-3131 Polymer Science 030301 Chemical Characterisation of Materials Journal Article 2006 ftunivqespace https://doi.org/10.1021/ma061310q 2020-10-27T00:08:18Z The kinetics of enzymatic ring-opening polymerization (eROP) of ε-caprolactone in supercritical carbon dioxide (scCO2) was investigated using a new, high-pressure sampling autoclave. The polymerization was performed using Candida antarctica lipase B (CALB) as catalyst and was found to be approximately first order with respect to monomer up to 80% conversion. For the first time we have been able to present kinetic results on the eROP of caprolactone in scCO2. These results show that high molecular weight polymer could be obtained (up to 50 kDa) with polydispersities in the range of 2. The relatively poor molecular weight control was attributed to the large degree of enzyme-catalyzed transesterification that forms both cyclic species (intramolecular transesterification) and linear polymer (intermolecular transesterification). This effect has also been observed for eROP of ε-caprolactone in conventional solvents. The formation of cyclic oligomers of poly(caprolactone) (PCL) was investigated as a function of conversion, and comparisons were made to similar studies undertaken in conventional solvents. Article in Journal/Newspaper Antarc* Antarctica The University of Queensland: UQ eSpace Macromolecules 39 23 7967 7972 |
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Open Polar |
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The University of Queensland: UQ eSpace |
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ftunivqespace |
language |
English |
topic |
Polymer Science 030301 Chemical Characterisation of Materials |
spellingShingle |
Polymer Science 030301 Chemical Characterisation of Materials Thurecht, Kristofer J. Heise, Andreas deGeus, Matthijs Villarroya, Silvia Zhou, Jiaxiang Wyatt, Mark F. Howdle, Steven M. Kinetics of Enzymatic Ring-Opening Polymerization of ε-Caprolactone in Supercritical Carbon Dioxide |
topic_facet |
Polymer Science 030301 Chemical Characterisation of Materials |
description |
The kinetics of enzymatic ring-opening polymerization (eROP) of ε-caprolactone in supercritical carbon dioxide (scCO2) was investigated using a new, high-pressure sampling autoclave. The polymerization was performed using Candida antarctica lipase B (CALB) as catalyst and was found to be approximately first order with respect to monomer up to 80% conversion. For the first time we have been able to present kinetic results on the eROP of caprolactone in scCO2. These results show that high molecular weight polymer could be obtained (up to 50 kDa) with polydispersities in the range of 2. The relatively poor molecular weight control was attributed to the large degree of enzyme-catalyzed transesterification that forms both cyclic species (intramolecular transesterification) and linear polymer (intermolecular transesterification). This effect has also been observed for eROP of ε-caprolactone in conventional solvents. The formation of cyclic oligomers of poly(caprolactone) (PCL) was investigated as a function of conversion, and comparisons were made to similar studies undertaken in conventional solvents. |
format |
Article in Journal/Newspaper |
author |
Thurecht, Kristofer J. Heise, Andreas deGeus, Matthijs Villarroya, Silvia Zhou, Jiaxiang Wyatt, Mark F. Howdle, Steven M. |
author_facet |
Thurecht, Kristofer J. Heise, Andreas deGeus, Matthijs Villarroya, Silvia Zhou, Jiaxiang Wyatt, Mark F. Howdle, Steven M. |
author_sort |
Thurecht, Kristofer J. |
title |
Kinetics of Enzymatic Ring-Opening Polymerization of ε-Caprolactone in Supercritical Carbon Dioxide |
title_short |
Kinetics of Enzymatic Ring-Opening Polymerization of ε-Caprolactone in Supercritical Carbon Dioxide |
title_full |
Kinetics of Enzymatic Ring-Opening Polymerization of ε-Caprolactone in Supercritical Carbon Dioxide |
title_fullStr |
Kinetics of Enzymatic Ring-Opening Polymerization of ε-Caprolactone in Supercritical Carbon Dioxide |
title_full_unstemmed |
Kinetics of Enzymatic Ring-Opening Polymerization of ε-Caprolactone in Supercritical Carbon Dioxide |
title_sort |
kinetics of enzymatic ring-opening polymerization of ε-caprolactone in supercritical carbon dioxide |
publisher |
American Chemical Society |
publishDate |
2006 |
url |
https://espace.library.uq.edu.au/view/UQ:162176 |
genre |
Antarc* Antarctica |
genre_facet |
Antarc* Antarctica |
op_relation |
doi:10.1021/ma061310q issn:0024-9297 orcid:0000-0002-4100-3131 |
op_doi |
https://doi.org/10.1021/ma061310q |
container_title |
Macromolecules |
container_volume |
39 |
container_issue |
23 |
container_start_page |
7967 |
op_container_end_page |
7972 |
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1766262183626276864 |