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Ring-opening polymerization of ε-caprolactone initiated by tin(II) octoate/n-hexanol: DSC isoconversional kinetics analysis and polymer synthesis

The kinetics of ring-opening polymerization (ROP) of ε-caprolactone (ε-CL) initiated by 1.0, 1.5 and 2.0 mol% of stannous(II) octoate/n-hexanol (Sn(Oct)(2)/n-HexOH) wase successfully studied by non-isothermal differential scanning calorimetry (DSC) at heating rates of 5, 10, 15 and 20 °C/min. The DS...

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Autores principales: Punyodom, Winita, Limwanich, Wanich, Meepowpan, Puttinan, Thapsukhon, Boontharika
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Taylor & Francis 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8043532/
https://www.ncbi.nlm.nih.gov/pubmed/33889054
http://dx.doi.org/10.1080/15685551.2021.1908657
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author Punyodom, Winita
Limwanich, Wanich
Meepowpan, Puttinan
Thapsukhon, Boontharika
author_facet Punyodom, Winita
Limwanich, Wanich
Meepowpan, Puttinan
Thapsukhon, Boontharika
author_sort Punyodom, Winita
collection PubMed
description The kinetics of ring-opening polymerization (ROP) of ε-caprolactone (ε-CL) initiated by 1.0, 1.5 and 2.0 mol% of stannous(II) octoate/n-hexanol (Sn(Oct)(2)/n-HexOH) wase successfully studied by non-isothermal differential scanning calorimetry (DSC) at heating rates of 5, 10, 15 and 20 °C/min. The DSC polymerization kinetic parameters of ε-CL were calculated using differential (Friedman) and integral isoconversional methods (Kissinger-Akahira-Sunose, KAS). The average activation energy (E(a)) values obtained from Friedman and KAS methods were in the range of 64.9–70.5 kJ/mol and 64.9–80.4 kJ/mol, respectively. The values of frequency factor (A) were determined from model fitting method using Avrami-Erofeev reaction model. The average values of A for the ROP of ε-CL initiated by 1.0, 1.5 and 2.0 mol% of Sn(Oct)(2)/n-HexOH (1:2) were 7.3x10(7), 2.8x10(6) and 1.2x10(6) min(−1), respectively. From kinetics studied, the polymerization rate of ε-CL increased with increasing initiator concentration. The performance of Sn(Oct)(2)/n-HexOH in the synthesis of poly(ε-caprolactone) (PCL) was investigated by bulk polymerization at temperatures of 140, 160 and 180 °C. Sn(Oct)(2)/n-HexOH (1:2) could produce high number average molecular weight ([Image: see text] = 9.0 × 10(4) g/mol) and %yield (89%) of PCL in a short period of time at Sn(Oct)(2) concentration of 0.1 mol% and temperature of 160°C. The mechanism of the ROP of ε-CL with Sn(Oct)(2)/n-HexOH was proposed through the coordination-insertion mechanism.
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spelling pubmed-80435322021-04-21 Ring-opening polymerization of ε-caprolactone initiated by tin(II) octoate/n-hexanol: DSC isoconversional kinetics analysis and polymer synthesis Punyodom, Winita Limwanich, Wanich Meepowpan, Puttinan Thapsukhon, Boontharika Des Monomers Polym Full Length Article The kinetics of ring-opening polymerization (ROP) of ε-caprolactone (ε-CL) initiated by 1.0, 1.5 and 2.0 mol% of stannous(II) octoate/n-hexanol (Sn(Oct)(2)/n-HexOH) wase successfully studied by non-isothermal differential scanning calorimetry (DSC) at heating rates of 5, 10, 15 and 20 °C/min. The DSC polymerization kinetic parameters of ε-CL were calculated using differential (Friedman) and integral isoconversional methods (Kissinger-Akahira-Sunose, KAS). The average activation energy (E(a)) values obtained from Friedman and KAS methods were in the range of 64.9–70.5 kJ/mol and 64.9–80.4 kJ/mol, respectively. The values of frequency factor (A) were determined from model fitting method using Avrami-Erofeev reaction model. The average values of A for the ROP of ε-CL initiated by 1.0, 1.5 and 2.0 mol% of Sn(Oct)(2)/n-HexOH (1:2) were 7.3x10(7), 2.8x10(6) and 1.2x10(6) min(−1), respectively. From kinetics studied, the polymerization rate of ε-CL increased with increasing initiator concentration. The performance of Sn(Oct)(2)/n-HexOH in the synthesis of poly(ε-caprolactone) (PCL) was investigated by bulk polymerization at temperatures of 140, 160 and 180 °C. Sn(Oct)(2)/n-HexOH (1:2) could produce high number average molecular weight ([Image: see text] = 9.0 × 10(4) g/mol) and %yield (89%) of PCL in a short period of time at Sn(Oct)(2) concentration of 0.1 mol% and temperature of 160°C. The mechanism of the ROP of ε-CL with Sn(Oct)(2)/n-HexOH was proposed through the coordination-insertion mechanism. Taylor & Francis 2021-04-11 /pmc/articles/PMC8043532/ /pubmed/33889054 http://dx.doi.org/10.1080/15685551.2021.1908657 Text en © 2021 The Author(s). Published by Informa UK Limited, trading as Taylor & Francis Group. https://creativecommons.org/licenses/by-nc/4.0/This is an Open Access article distributed under the terms of the Creative Commons Attribution-NonCommercial License (http://creativecommons.org/licenses/by-nc/4.0/ (https://creativecommons.org/licenses/by-nc/4.0/) ), which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
spellingShingle Full Length Article
Punyodom, Winita
Limwanich, Wanich
Meepowpan, Puttinan
Thapsukhon, Boontharika
Ring-opening polymerization of ε-caprolactone initiated by tin(II) octoate/n-hexanol: DSC isoconversional kinetics analysis and polymer synthesis
title Ring-opening polymerization of ε-caprolactone initiated by tin(II) octoate/n-hexanol: DSC isoconversional kinetics analysis and polymer synthesis
title_full Ring-opening polymerization of ε-caprolactone initiated by tin(II) octoate/n-hexanol: DSC isoconversional kinetics analysis and polymer synthesis
title_fullStr Ring-opening polymerization of ε-caprolactone initiated by tin(II) octoate/n-hexanol: DSC isoconversional kinetics analysis and polymer synthesis
title_full_unstemmed Ring-opening polymerization of ε-caprolactone initiated by tin(II) octoate/n-hexanol: DSC isoconversional kinetics analysis and polymer synthesis
title_short Ring-opening polymerization of ε-caprolactone initiated by tin(II) octoate/n-hexanol: DSC isoconversional kinetics analysis and polymer synthesis
title_sort ring-opening polymerization of ε-caprolactone initiated by tin(ii) octoate/n-hexanol: dsc isoconversional kinetics analysis and polymer synthesis
topic Full Length Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8043532/
https://www.ncbi.nlm.nih.gov/pubmed/33889054
http://dx.doi.org/10.1080/15685551.2021.1908657
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