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 DSC...
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| Format: | Article |
| Language: | English |
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Taylor & Francis Group
2021-01-01
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| Series: | Designed Monomers and Polymers |
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| Online Access: | http://dx.doi.org/10.1080/15685551.2021.1908657 |
| _version_ | 1828283080170799104 |
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| author | Winita Punyodom Wanich Limwanich Puttinan Meepowpan Boontharika Thapsukhon |
| author_facet | Winita Punyodom Wanich Limwanich Puttinan Meepowpan Boontharika Thapsukhon |
| author_sort | Winita Punyodom |
| collection | DOAJ |
| 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 (Ea) 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 7.3x107, 2.8x106 and 1.2x106 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 ($$\overline {{M_{\rm{n}}}} $$= 9.0 × 104 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. |
| first_indexed | 2024-04-13T08:39:36Z |
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| id | doaj.art-0e6bb30ef48e47b2b16e873c2e13bdd5 |
| institution | Directory Open Access Journal |
| issn | 1385-772X 1568-5551 |
| language | English |
| last_indexed | 2024-04-13T08:39:36Z |
| publishDate | 2021-01-01 |
| publisher | Taylor & Francis Group |
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| series | Designed Monomers and Polymers |
| spelling | doaj.art-0e6bb30ef48e47b2b16e873c2e13bdd52022-12-22T02:53:56ZengTaylor & Francis GroupDesigned Monomers and Polymers1385-772X1568-55512021-01-01241899710.1080/15685551.2021.19086571908657Ring-opening polymerization of ε-caprolactone initiated by tin(II) octoate/n-hexanol: DSC isoconversional kinetics analysis and polymer synthesisWinita Punyodom0Wanich Limwanich1Puttinan Meepowpan2Boontharika Thapsukhon3Chiang Mai UniversityRajamangala University of Technology LannaChiang Mai UniversitySchool of Science, University of PhayaoThe 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 (Ea) 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 7.3x107, 2.8x106 and 1.2x106 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 ($$\overline {{M_{\rm{n}}}} $$= 9.0 × 104 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.http://dx.doi.org/10.1080/15685551.2021.1908657kineticsdscε-caprolactonering-opening polymerizationtin(ii) octoate |
| spellingShingle | Winita Punyodom Wanich Limwanich Puttinan Meepowpan Boontharika Thapsukhon Ring-opening polymerization of ε-caprolactone initiated by tin(II) octoate/n-hexanol: DSC isoconversional kinetics analysis and polymer synthesis Designed Monomers and Polymers kinetics dsc ε-caprolactone ring-opening polymerization tin(ii) octoate |
| 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 | kinetics dsc ε-caprolactone ring-opening polymerization tin(ii) octoate |
| url | http://dx.doi.org/10.1080/15685551.2021.1908657 |
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