The use of aluminum trialkoxide for synthesis of poly (ε-caprolactone) and poly (δ-valerolactone): A comparative study
Four aluminum(III) trialkoxides, namely Al(III) ethoxide (1), Al(III) isopropoxide (2), Al(III) tert-butoxide (3), and Al(III) sec.-butoxide (4), were employed as initiators for the bulk ring-opening polymerizations of δ-valerolactone (VL) and εcaprolactone (CL). Chemical structure and properties...
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Prince of Songkla University
2018-08-01
|
| Series: | Songklanakarin Journal of Science and Technology (SJST) |
| Subjects: | |
| Online Access: | https://rdo.psu.ac.th/sjstweb/journal/40-4/16.pdf |
| _version_ | 1818835155931889664 |
|---|---|
| author | Jitrayut Jitonnom Robert Molloy Winita Punyodom Wijitra Meelua |
| author_facet | Jitrayut Jitonnom Robert Molloy Winita Punyodom Wijitra Meelua |
| author_sort | Jitrayut Jitonnom |
| collection | DOAJ |
| description | Four aluminum(III) trialkoxides, namely Al(III) ethoxide (1), Al(III) isopropoxide (2), Al(III) tert-butoxide (3), and
Al(III) sec.-butoxide (4), were employed as initiators for the bulk ring-opening polymerizations of δ-valerolactone (VL) and εcaprolactone
(CL). Chemical structure and properties of the prepared polymers were assessed by various techniques, such as
1
FTIR, H-NMR, GPC, TGA and DSC. The effects of initiator concentrations and solubility as well as temperature were
investigated for optimum polymerization conditions. It was found that the optimal conditions were 120 °C for 72 hours with
0.2 %mol of initiator. However, 1 and 3 only partially dissolved in the CL monomer and gave no polymerization at low initiator
concentration. In contrast, 4 was completely soluble in CL monomer and gave the highest yield (92%) and molecular weight
( M n = 2.83 x 104
g/mol). Both polymers exhibited similar melting characteristics, with PCL being thermally more stable than
PVL. |
| first_indexed | 2024-12-19T02:46:13Z |
| format | Article |
| id | doaj.art-c37c8b26c4e94546b9f53efc1142b57f |
| institution | Directory Open Access Journal |
| issn | 0125-3395 |
| language | English |
| last_indexed | 2024-12-19T02:46:13Z |
| publishDate | 2018-08-01 |
| publisher | Prince of Songkla University |
| record_format | Article |
| series | Songklanakarin Journal of Science and Technology (SJST) |
| spelling | doaj.art-c37c8b26c4e94546b9f53efc1142b57f2022-12-21T20:38:53ZengPrince of Songkla UniversitySongklanakarin Journal of Science and Technology (SJST)0125-33952018-08-0140485485910.14456/sjst-psu.2018.120The use of aluminum trialkoxide for synthesis of poly (ε-caprolactone) and poly (δ-valerolactone): A comparative studyJitrayut Jitonnom0Robert Molloy1Winita Punyodom2Wijitra Meelua3Division of Chemistry, School of Science, University of Phayao, Mueang, Phayao, 56000 Thailand Polymer Research Laboratory, Department of Chemistry, Faculty of Science, Chiang Mai University, Mueang, Chiang Mai, 50200 Thailand Polymer Research Laboratory, Department of Chemistry, Faculty of Science, Chiang Mai University, Mueang, Chiang Mai, 50200 Thailand Division of Chemistry, School of Science, University of Phayao, Mueang, Phayao, 56000 Thailand Four aluminum(III) trialkoxides, namely Al(III) ethoxide (1), Al(III) isopropoxide (2), Al(III) tert-butoxide (3), and Al(III) sec.-butoxide (4), were employed as initiators for the bulk ring-opening polymerizations of δ-valerolactone (VL) and εcaprolactone (CL). Chemical structure and properties of the prepared polymers were assessed by various techniques, such as 1 FTIR, H-NMR, GPC, TGA and DSC. The effects of initiator concentrations and solubility as well as temperature were investigated for optimum polymerization conditions. It was found that the optimal conditions were 120 °C for 72 hours with 0.2 %mol of initiator. However, 1 and 3 only partially dissolved in the CL monomer and gave no polymerization at low initiator concentration. In contrast, 4 was completely soluble in CL monomer and gave the highest yield (92%) and molecular weight ( M n = 2.83 x 104 g/mol). Both polymers exhibited similar melting characteristics, with PCL being thermally more stable than PVL.https://rdo.psu.ac.th/sjstweb/journal/40-4/16.pdfbulk ring-opening polymerizationlactonealuminum trialkoxidebiodegradable polymercharacterization |
| spellingShingle | Jitrayut Jitonnom Robert Molloy Winita Punyodom Wijitra Meelua The use of aluminum trialkoxide for synthesis of poly (ε-caprolactone) and poly (δ-valerolactone): A comparative study Songklanakarin Journal of Science and Technology (SJST) bulk ring-opening polymerization lactone aluminum trialkoxide biodegradable polymer characterization |
| title | The use of aluminum trialkoxide for synthesis of poly (ε-caprolactone) and poly (δ-valerolactone): A comparative study |
| title_full | The use of aluminum trialkoxide for synthesis of poly (ε-caprolactone) and poly (δ-valerolactone): A comparative study |
| title_fullStr | The use of aluminum trialkoxide for synthesis of poly (ε-caprolactone) and poly (δ-valerolactone): A comparative study |
| title_full_unstemmed | The use of aluminum trialkoxide for synthesis of poly (ε-caprolactone) and poly (δ-valerolactone): A comparative study |
| title_short | The use of aluminum trialkoxide for synthesis of poly (ε-caprolactone) and poly (δ-valerolactone): A comparative study |
| title_sort | use of aluminum trialkoxide for synthesis of poly ε caprolactone and poly δ valerolactone a comparative study |
| topic | bulk ring-opening polymerization lactone aluminum trialkoxide biodegradable polymer characterization |
| url | https://rdo.psu.ac.th/sjstweb/journal/40-4/16.pdf |
| work_keys_str_mv | AT jitrayutjitonnom theuseofaluminumtrialkoxideforsynthesisofpolyecaprolactoneandpolydvalerolactoneacomparativestudy AT robertmolloy theuseofaluminumtrialkoxideforsynthesisofpolyecaprolactoneandpolydvalerolactoneacomparativestudy AT winitapunyodom theuseofaluminumtrialkoxideforsynthesisofpolyecaprolactoneandpolydvalerolactoneacomparativestudy AT wijitrameelua theuseofaluminumtrialkoxideforsynthesisofpolyecaprolactoneandpolydvalerolactoneacomparativestudy AT jitrayutjitonnom useofaluminumtrialkoxideforsynthesisofpolyecaprolactoneandpolydvalerolactoneacomparativestudy AT robertmolloy useofaluminumtrialkoxideforsynthesisofpolyecaprolactoneandpolydvalerolactoneacomparativestudy AT winitapunyodom useofaluminumtrialkoxideforsynthesisofpolyecaprolactoneandpolydvalerolactoneacomparativestudy AT wijitrameelua useofaluminumtrialkoxideforsynthesisofpolyecaprolactoneandpolydvalerolactoneacomparativestudy |