Synthesis and Characterization of <i>N</i>-Substituted Polyether-<i>Block</i>-Amide Copolymers
A series of <i>N-</i>substituted polyether-<i>block</i>-amide (PEBA-X%) copolymers were prepared by melt polycondensation of nylon-6 prepolymer and polytetramethylene ether glycol at an elevated temperature using titanium isopropoxide as a catalyst. The structure, thermal pro...
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2021-02-01
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| Online Access: | https://www.mdpi.com/1996-1944/14/4/773 |
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| author | Jyun-Yan Ye Kuo-Fu Peng Yu-Ning Zhang Szu-Yuan Huang Mong Liang |
| author_facet | Jyun-Yan Ye Kuo-Fu Peng Yu-Ning Zhang Szu-Yuan Huang Mong Liang |
| author_sort | Jyun-Yan Ye |
| collection | DOAJ |
| description | A series of <i>N-</i>substituted polyether-<i>block</i>-amide (PEBA-X%) copolymers were prepared by melt polycondensation of nylon-6 prepolymer and polytetramethylene ether glycol at an elevated temperature using titanium isopropoxide as a catalyst. The structure, thermal properties, and crystallinity of PEBA-X% were investigated using nuclear magnetic resonance spectroscopy, Fourier-transform infrared spectroscopy, differential scanning calorimetry, wide angle X-ray diffraction, and thermogravimetric analysis. In general, the crystallinity, melting point, and thermal degradation temperature of PEBA-X% decreased as the incorporation of <i>N</i>-methyl functionalized groups increased, owing to the disruption caused to the structural regularity of the copolymer. However, in <i>N</i>-acetyl functionalized analogues, the crystallinity first dropped and then increased because of a new γ form arrangement that developed in the microstructure. After the cross-linking reaction of the <i>N</i>-methyl-substituted derivative, which has electron-donating characteristics, with poly(4,4′-methylenebis(phenyl isocyanate), the decomposition temperature of the resulting polymer significantly increased, whereas no such improvements could be observed in the case of the electro-withdrawing <i>N</i>-acetyl-substituted derivative, because of the incompleteness of its cross-linking reaction. |
| first_indexed | 2024-03-09T05:20:15Z |
| format | Article |
| id | doaj.art-88e73ec22b8044aaa69b6f5b9f428d0f |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-09T05:20:15Z |
| publishDate | 2021-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-88e73ec22b8044aaa69b6f5b9f428d0f2023-12-03T12:41:39ZengMDPI AGMaterials1996-19442021-02-0114477310.3390/ma14040773Synthesis and Characterization of <i>N</i>-Substituted Polyether-<i>Block</i>-Amide CopolymersJyun-Yan Ye0Kuo-Fu Peng1Yu-Ning Zhang2Szu-Yuan Huang3Mong Liang4Department of Applied Chemistry, National Chia-Yi University, Chia-Yi 600, TaiwanDepartment of Footwear Technology, Footwear & Recreation Technology Research Institute, Taichung 407, TaiwanDepartment of Applied Chemistry, National Chia-Yi University, Chia-Yi 600, TaiwanDepartment of Footwear Technology, Footwear & Recreation Technology Research Institute, Taichung 407, TaiwanDepartment of Applied Chemistry, National Chia-Yi University, Chia-Yi 600, TaiwanA series of <i>N-</i>substituted polyether-<i>block</i>-amide (PEBA-X%) copolymers were prepared by melt polycondensation of nylon-6 prepolymer and polytetramethylene ether glycol at an elevated temperature using titanium isopropoxide as a catalyst. The structure, thermal properties, and crystallinity of PEBA-X% were investigated using nuclear magnetic resonance spectroscopy, Fourier-transform infrared spectroscopy, differential scanning calorimetry, wide angle X-ray diffraction, and thermogravimetric analysis. In general, the crystallinity, melting point, and thermal degradation temperature of PEBA-X% decreased as the incorporation of <i>N</i>-methyl functionalized groups increased, owing to the disruption caused to the structural regularity of the copolymer. However, in <i>N</i>-acetyl functionalized analogues, the crystallinity first dropped and then increased because of a new γ form arrangement that developed in the microstructure. After the cross-linking reaction of the <i>N</i>-methyl-substituted derivative, which has electron-donating characteristics, with poly(4,4′-methylenebis(phenyl isocyanate), the decomposition temperature of the resulting polymer significantly increased, whereas no such improvements could be observed in the case of the electro-withdrawing <i>N</i>-acetyl-substituted derivative, because of the incompleteness of its cross-linking reaction.https://www.mdpi.com/1996-1944/14/4/773polyether-<i>block</i>-amide<i>N</i>-substituted nylon elastomerspolyamide 6crystallinitythermal properties |
| spellingShingle | Jyun-Yan Ye Kuo-Fu Peng Yu-Ning Zhang Szu-Yuan Huang Mong Liang Synthesis and Characterization of <i>N</i>-Substituted Polyether-<i>Block</i>-Amide Copolymers Materials polyether-<i>block</i>-amide <i>N</i>-substituted nylon elastomers polyamide 6 crystallinity thermal properties |
| title | Synthesis and Characterization of <i>N</i>-Substituted Polyether-<i>Block</i>-Amide Copolymers |
| title_full | Synthesis and Characterization of <i>N</i>-Substituted Polyether-<i>Block</i>-Amide Copolymers |
| title_fullStr | Synthesis and Characterization of <i>N</i>-Substituted Polyether-<i>Block</i>-Amide Copolymers |
| title_full_unstemmed | Synthesis and Characterization of <i>N</i>-Substituted Polyether-<i>Block</i>-Amide Copolymers |
| title_short | Synthesis and Characterization of <i>N</i>-Substituted Polyether-<i>Block</i>-Amide Copolymers |
| title_sort | synthesis and characterization of i n i substituted polyether i block i amide copolymers |
| topic | polyether-<i>block</i>-amide <i>N</i>-substituted nylon elastomers polyamide 6 crystallinity thermal properties |
| url | https://www.mdpi.com/1996-1944/14/4/773 |
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