End-Group Evaluation of HEMA Initiated Poly(ε-caprolactone) Macromonomers via Enzymatic Ring-Opening Polymerization
Poly(ε-caprolactone) (PCL) macromonomers comprising acrylate end-functionality were synthesized via enzymatic ring-opening polymerization (eROP) by utilizing commercially available Candida antarctica Lipase B (CALB), Novozyme-435. 2-Hydroxyethyl methacrylate (HEMA) was purposed to be the nucleophili...
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fthindawi:oai:hindawi.com:10.1155/2015/458756 2023-05-15T14:01:44+02:00 End-Group Evaluation of HEMA Initiated Poly(ε-caprolactone) Macromonomers via Enzymatic Ring-Opening Polymerization N. Ugur Kaya Y. Avcibasi Guvenilir 2015 https://doi.org/10.1155/2015/458756 en eng International Journal of Polymer Science https://doi.org/10.1155/2015/458756 Copyright © 2015 N. Ugur Kaya and Y. Avcibasi Guvenilir. Research Article 2015 fthindawi https://doi.org/10.1155/2015/458756 2019-05-26T03:10:52Z Poly(ε-caprolactone) (PCL) macromonomers comprising acrylate end-functionality were synthesized via enzymatic ring-opening polymerization (eROP) by utilizing commercially available Candida antarctica Lipase B (CALB), Novozyme-435. 2-Hydroxyethyl methacrylate (HEMA) was purposed to be the nucleophilic initiator in eROP. The side reactions generated due to the cleavage of ester bonds in HEMA and the growing polymer chains were investigated through altering polymerization period, initiator concentration, temperature, and enzyme concentration. 1H NMR evaluations showed that minimum quantities of side reactions were in lower temperatures, initiator concentration, enzyme concentration, and lower monomer conversions. Gel permeation chromatography (GPC) results revealed that lower polydispersity along with number-average molecular weight of end-functionalized PCL macromonomers was obtained depending on higher initiator/monomer ratios, lower temperature (60°C), enzyme concentration (100 mg), and/or polymerization time (2 h). Furthermore, 0.1 HEMA/ε-caprolactone (CL) ratio had higher molecular weight than 0.5 HEMA/CL ratio, while keeping a close value of methacrylate transfer, total methacrylate end-groups, and lower polyester transfer. Article in Journal/Newspaper Antarc* Antarctica Hindawi Publishing Corporation International Journal of Polymer Science 2015 1 9 |
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Open Polar |
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Hindawi Publishing Corporation |
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fthindawi |
language |
English |
description |
Poly(ε-caprolactone) (PCL) macromonomers comprising acrylate end-functionality were synthesized via enzymatic ring-opening polymerization (eROP) by utilizing commercially available Candida antarctica Lipase B (CALB), Novozyme-435. 2-Hydroxyethyl methacrylate (HEMA) was purposed to be the nucleophilic initiator in eROP. The side reactions generated due to the cleavage of ester bonds in HEMA and the growing polymer chains were investigated through altering polymerization period, initiator concentration, temperature, and enzyme concentration. 1H NMR evaluations showed that minimum quantities of side reactions were in lower temperatures, initiator concentration, enzyme concentration, and lower monomer conversions. Gel permeation chromatography (GPC) results revealed that lower polydispersity along with number-average molecular weight of end-functionalized PCL macromonomers was obtained depending on higher initiator/monomer ratios, lower temperature (60°C), enzyme concentration (100 mg), and/or polymerization time (2 h). Furthermore, 0.1 HEMA/ε-caprolactone (CL) ratio had higher molecular weight than 0.5 HEMA/CL ratio, while keeping a close value of methacrylate transfer, total methacrylate end-groups, and lower polyester transfer. |
format |
Article in Journal/Newspaper |
author |
N. Ugur Kaya Y. Avcibasi Guvenilir |
spellingShingle |
N. Ugur Kaya Y. Avcibasi Guvenilir End-Group Evaluation of HEMA Initiated Poly(ε-caprolactone) Macromonomers via Enzymatic Ring-Opening Polymerization |
author_facet |
N. Ugur Kaya Y. Avcibasi Guvenilir |
author_sort |
N. Ugur Kaya |
title |
End-Group Evaluation of HEMA Initiated Poly(ε-caprolactone) Macromonomers via Enzymatic Ring-Opening Polymerization |
title_short |
End-Group Evaluation of HEMA Initiated Poly(ε-caprolactone) Macromonomers via Enzymatic Ring-Opening Polymerization |
title_full |
End-Group Evaluation of HEMA Initiated Poly(ε-caprolactone) Macromonomers via Enzymatic Ring-Opening Polymerization |
title_fullStr |
End-Group Evaluation of HEMA Initiated Poly(ε-caprolactone) Macromonomers via Enzymatic Ring-Opening Polymerization |
title_full_unstemmed |
End-Group Evaluation of HEMA Initiated Poly(ε-caprolactone) Macromonomers via Enzymatic Ring-Opening Polymerization |
title_sort |
end-group evaluation of hema initiated poly(ε-caprolactone) macromonomers via enzymatic ring-opening polymerization |
publisher |
International Journal of Polymer Science |
publishDate |
2015 |
url |
https://doi.org/10.1155/2015/458756 |
genre |
Antarc* Antarctica |
genre_facet |
Antarc* Antarctica |
op_relation |
https://doi.org/10.1155/2015/458756 |
op_rights |
Copyright © 2015 N. Ugur Kaya and Y. Avcibasi Guvenilir. |
op_doi |
https://doi.org/10.1155/2015/458756 |
container_title |
International Journal of Polymer Science |
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2015 |
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1 |
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9 |
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1766271772298051584 |