Crystallization behavior and morphological features of ethylene-vinyl alcohol 44 copolymer
This work is a first attempt to study the crystallization behavior of ethylene-vinyl alcohol copolymer with 44 mol% of ethylene units (EVOH44) and to observe the supermolecular structures developed during its crystallization. Thermal analysis has evidenced a very fast crystallization and the formati...
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| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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Budapest University of Technology and Economics
2022-04-01
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| Series: | eXPRESS Polymer Letters |
| Subjects: | |
| Online Access: | http://www.expresspolymlett.com/letolt.php?file=EPL-0011583&mi=cd |
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| author | Clement Freymond Alain Guinault Matthieu Gervais Miroslaw Pluta Tomasz Makowski Ewa Piorkowska Cyrille Sollogoub |
| author_facet | Clement Freymond Alain Guinault Matthieu Gervais Miroslaw Pluta Tomasz Makowski Ewa Piorkowska Cyrille Sollogoub |
| author_sort | Clement Freymond |
| collection | DOAJ |
| description | This work is a first attempt to study the crystallization behavior of ethylene-vinyl alcohol copolymer with 44 mol% of ethylene units (EVOH44) and to observe the supermolecular structures developed during its crystallization. Thermal analysis has evidenced a very fast crystallization and the formation of different crystal populations during isothermal crystallization. In-situ wide-angle X-ray scattering experiments using a synchrotron radiation source have shown a unique orthorhombic morphology, independently of the crystallization conditions. Small spherulites (with an average radius of about 1 μm) were observed using polarized optical microscopy and confirmed by typical four-leaf patterns obtained by small-angle light scattering. In-situ atomic force microscopy has revealed stacked lamellae growing from common centers to form small spherulitic entities. Finally, studies of isothermal crystallization have evidenced the existence of partial crystallization (especially at high crystallization temperatures) and the need for higher undercooling to complete crystallization. |
| format | Article |
| id | doaj-art-2ff6e6eb4bb74be296890e6f46acf9f3 |
| institution | Matheson Library |
| issn | 1788-618X |
| language | English |
| publishDate | 2022-04-01 |
| publisher | Budapest University of Technology and Economics |
| record_format | Article |
| series | eXPRESS Polymer Letters |
| spelling | doaj-art-2ff6e6eb4bb74be296890e6f46acf9f32025-07-02T05:27:45ZengBudapest University of Technology and EconomicseXPRESS Polymer Letters1788-618X2022-04-0116433835310.3144/expresspolymlett.2022.26Crystallization behavior and morphological features of ethylene-vinyl alcohol 44 copolymerClement FreymondAlain GuinaultMatthieu GervaisMiroslaw PlutaTomasz MakowskiEwa PiorkowskaCyrille SollogoubThis work is a first attempt to study the crystallization behavior of ethylene-vinyl alcohol copolymer with 44 mol% of ethylene units (EVOH44) and to observe the supermolecular structures developed during its crystallization. Thermal analysis has evidenced a very fast crystallization and the formation of different crystal populations during isothermal crystallization. In-situ wide-angle X-ray scattering experiments using a synchrotron radiation source have shown a unique orthorhombic morphology, independently of the crystallization conditions. Small spherulites (with an average radius of about 1 μm) were observed using polarized optical microscopy and confirmed by typical four-leaf patterns obtained by small-angle light scattering. In-situ atomic force microscopy has revealed stacked lamellae growing from common centers to form small spherulitic entities. Finally, studies of isothermal crystallization have evidenced the existence of partial crystallization (especially at high crystallization temperatures) and the need for higher undercooling to complete crystallization.http://www.expresspolymlett.com/letolt.php?file=EPL-0011583&mi=cdthermal propertiescrystallizationevohcrystalline morphologyethylene-vinyl alcohol copolymer |
| spellingShingle | Clement Freymond Alain Guinault Matthieu Gervais Miroslaw Pluta Tomasz Makowski Ewa Piorkowska Cyrille Sollogoub Crystallization behavior and morphological features of ethylene-vinyl alcohol 44 copolymer eXPRESS Polymer Letters thermal properties crystallization evoh crystalline morphology ethylene-vinyl alcohol copolymer |
| title | Crystallization behavior and morphological features of ethylene-vinyl alcohol 44 copolymer |
| title_full | Crystallization behavior and morphological features of ethylene-vinyl alcohol 44 copolymer |
| title_fullStr | Crystallization behavior and morphological features of ethylene-vinyl alcohol 44 copolymer |
| title_full_unstemmed | Crystallization behavior and morphological features of ethylene-vinyl alcohol 44 copolymer |
| title_short | Crystallization behavior and morphological features of ethylene-vinyl alcohol 44 copolymer |
| title_sort | crystallization behavior and morphological features of ethylene vinyl alcohol 44 copolymer |
| topic | thermal properties crystallization evoh crystalline morphology ethylene-vinyl alcohol copolymer |
| url | http://www.expresspolymlett.com/letolt.php?file=EPL-0011583&mi=cd |
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