Effects of different reaction mediums on ring opening polymerization of poly(ε-caprolactone) by lipase
This work examined the effects of reaction conditions on ring opening polymerization of poly(ε-caprolactone) (PCL) by Candida antarctica lipase B (Novozym 435) as the catalyst. Different reaction mediums were obtained by changing of temperature, reaction time and solvent types simultaneously. The ma...
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ftjafricanj:oai:ojs.ajol.info:article/129070 2023-05-15T13:59:20+02:00 Effects of different reaction mediums on ring opening polymerization of poly(ε-caprolactone) by lipase Ozsagiroglu, Erhan Iyisan, Banu Avcibasi-Guvenilir, Yuksel 2016-01-21 application/pdf http://www.ajol.info/index.php/ajb/article/view/129070 eng eng Academic Journals (Kenya) http://www.ajol.info/index.php/ajb/article/view/129070/118624 http://www.ajol.info/index.php/ajb/article/view/129070 10.4314/ajb.v11i63. Copyright for articles published in this journal is retained by the journal. African Journal of Biotechnology; Vol 11, No 63 (2012); 12688-12696 1684-5315 Candida antarctica lipase enzymatic ring-opening polymerization polycaprolactone biopolymers info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article 2016 ftjafricanj 2016-01-24T01:04:59Z This work examined the effects of reaction conditions on ring opening polymerization of poly(ε-caprolactone) (PCL) by Candida antarctica lipase B (Novozym 435) as the catalyst. Different reaction mediums were obtained by changing of temperature, reaction time and solvent types simultaneously. The main purpose of this study was to observe molecular weight distribution, conversion rates, and thermal behaviors of PCL and to find the highest molecular weight in enzymatic reaction conditions. Three different reaction temperatures and solvent types were studied in this work. Reactions were carried out at 40, 60 and 80°C and n-hexane, toluene and diisopropyl ether were used as solvents. One more reaction series were done for toluene solution at 30°C. Moreover, experiments were undertaken at seven different time periods. During all the reactions, monomer, solvent, and enzyme concentrations were not changed. For 1 ml monomer/solvent solution (0.44 M monomer and 0.56 M solvent), 10 mg lipase were used in the experiments. All samples were analyzed by gel permeation chromatography (GPC) and hydrogen nuclear magnetic resonance (1H-NMR) to obtain molecular weights, conversion rates, and chemical structures. Fourier transform infrared spectroscopy (FTIR) analysis was performed to determine chain structures of PCL samples. Thermal behaviors of samples were analyzed by differential scanning calorimetry (DSC) to examine and compare polymers with each other.Keywords: Candida antarctica lipase, enzymatic ring-opening polymerization, polycaprolactone, biopolymers Article in Journal/Newspaper Antarc* Antarctica AJOL - African Journals Online |
institution |
Open Polar |
collection |
AJOL - African Journals Online |
op_collection_id |
ftjafricanj |
language |
English |
topic |
Candida antarctica lipase enzymatic ring-opening polymerization polycaprolactone biopolymers |
spellingShingle |
Candida antarctica lipase enzymatic ring-opening polymerization polycaprolactone biopolymers Ozsagiroglu, Erhan Iyisan, Banu Avcibasi-Guvenilir, Yuksel Effects of different reaction mediums on ring opening polymerization of poly(ε-caprolactone) by lipase |
topic_facet |
Candida antarctica lipase enzymatic ring-opening polymerization polycaprolactone biopolymers |
description |
This work examined the effects of reaction conditions on ring opening polymerization of poly(ε-caprolactone) (PCL) by Candida antarctica lipase B (Novozym 435) as the catalyst. Different reaction mediums were obtained by changing of temperature, reaction time and solvent types simultaneously. The main purpose of this study was to observe molecular weight distribution, conversion rates, and thermal behaviors of PCL and to find the highest molecular weight in enzymatic reaction conditions. Three different reaction temperatures and solvent types were studied in this work. Reactions were carried out at 40, 60 and 80°C and n-hexane, toluene and diisopropyl ether were used as solvents. One more reaction series were done for toluene solution at 30°C. Moreover, experiments were undertaken at seven different time periods. During all the reactions, monomer, solvent, and enzyme concentrations were not changed. For 1 ml monomer/solvent solution (0.44 M monomer and 0.56 M solvent), 10 mg lipase were used in the experiments. All samples were analyzed by gel permeation chromatography (GPC) and hydrogen nuclear magnetic resonance (1H-NMR) to obtain molecular weights, conversion rates, and chemical structures. Fourier transform infrared spectroscopy (FTIR) analysis was performed to determine chain structures of PCL samples. Thermal behaviors of samples were analyzed by differential scanning calorimetry (DSC) to examine and compare polymers with each other.Keywords: Candida antarctica lipase, enzymatic ring-opening polymerization, polycaprolactone, biopolymers |
format |
Article in Journal/Newspaper |
author |
Ozsagiroglu, Erhan Iyisan, Banu Avcibasi-Guvenilir, Yuksel |
author_facet |
Ozsagiroglu, Erhan Iyisan, Banu Avcibasi-Guvenilir, Yuksel |
author_sort |
Ozsagiroglu, Erhan |
title |
Effects of different reaction mediums on ring opening polymerization of poly(ε-caprolactone) by lipase |
title_short |
Effects of different reaction mediums on ring opening polymerization of poly(ε-caprolactone) by lipase |
title_full |
Effects of different reaction mediums on ring opening polymerization of poly(ε-caprolactone) by lipase |
title_fullStr |
Effects of different reaction mediums on ring opening polymerization of poly(ε-caprolactone) by lipase |
title_full_unstemmed |
Effects of different reaction mediums on ring opening polymerization of poly(ε-caprolactone) by lipase |
title_sort |
effects of different reaction mediums on ring opening polymerization of poly(ε-caprolactone) by lipase |
publisher |
Academic Journals (Kenya) |
publishDate |
2016 |
url |
http://www.ajol.info/index.php/ajb/article/view/129070 |
genre |
Antarc* Antarctica |
genre_facet |
Antarc* Antarctica |
op_source |
African Journal of Biotechnology; Vol 11, No 63 (2012); 12688-12696 1684-5315 |
op_relation |
http://www.ajol.info/index.php/ajb/article/view/129070/118624 http://www.ajol.info/index.php/ajb/article/view/129070 10.4314/ajb.v11i63. |
op_rights |
Copyright for articles published in this journal is retained by the journal. |
_version_ |
1766267864804753408 |