Study of Crystalline and Thermal Properties of Nanocomposites Based on Polyamide-6 and Modified Montmorillonite
The main operational characteristics of polyamide-6-montmorillonite (PA6/MMT) nanocomposites, which determine their fields of application, mainly depend on the crystal structure and crystallinity of the polymer. Therefore, the study of the crystalline behavior of PA6 in such nanocomposites is of con...
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| Format: | Article |
| Language: | English |
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Lublin University of Technology
2023-12-01
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| Series: | Advances in Sciences and Technology |
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| Online Access: | http://www.astrj.com/Study-of-Crystalline-and-Thermal-Properties-of-Nanocomposites-Based-on-Polyamide,174180,0,2.html |
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| author | Volodymyr Krasinskyi Ludmila Dulebova Ivan Gajdoš Oksana Krasinska Tomasz Jachowicz |
| author_facet | Volodymyr Krasinskyi Ludmila Dulebova Ivan Gajdoš Oksana Krasinska Tomasz Jachowicz |
| author_sort | Volodymyr Krasinskyi |
| collection | DOAJ |
| description | The main operational characteristics of polyamide-6-montmorillonite (PA6/MMT) nanocomposites, which determine their fields of application, mainly depend on the crystal structure and crystallinity of the polymer. Therefore, the study of the crystalline behavior of PA6 in such nanocomposites is of considerable scientific and practical importance. In this work, the structure, crystalline, and thermal properties of nanocomposites based on PA6 and modified MMT prepared in a formic acid solution were investigated using the methods of differential scanning calorimetry (DSC) and X-ray Diffraction (XRD). It was established that during the manufacture of PA6/MMT nanocomposites in a solution, the dominant crystal structures are the thermodynamically stable α structures of PA6. The crystallinity degree of PA6 in nanocomposites is about 1.5 times higher than that of the original PA6. It is shown that after additional thermomechanical treatment of nanocomposites on a capillary viscometer at 230°С and a load of 5 kg, the uniformity of the distribution of exfoliated MMT in the polymer matrix increases, as a result of which the crystalline structure of PA6 changes and its glass transition and melting temperatures increase. These changes in the PA6 structure also have a significant impact on the melt flow index and the softening temperature of nanocomposites. |
| first_indexed | 2024-03-09T21:27:59Z |
| format | Article |
| id | doaj.art-d19a9dc7f7d5494fb61313b213adc208 |
| institution | Directory Open Access Journal |
| issn | 2080-4075 2299-8624 |
| language | English |
| last_indexed | 2024-03-09T21:27:59Z |
| publishDate | 2023-12-01 |
| publisher | Lublin University of Technology |
| record_format | Article |
| series | Advances in Sciences and Technology |
| spelling | doaj.art-d19a9dc7f7d5494fb61313b213adc2082023-11-23T21:04:59ZengLublin University of TechnologyAdvances in Sciences and Technology2080-40752299-86242023-12-01176889710.12913/22998624/174180174180Study of Crystalline and Thermal Properties of Nanocomposites Based on Polyamide-6 and Modified MontmorilloniteVolodymyr Krasinskyi0https://orcid.org/0000-0001-6374-9340Ludmila Dulebova1Ivan Gajdoš2Oksana Krasinska3Tomasz Jachowicz4Lukasiewicz Research Network – Institute for Engineering of Polymer Materials and Dyes, M. Skłodowska-Curie 55 St., 87-100 Torun, PolandFaculty of Mechanical Engineering, Department Technologies, Materials and Computer Aided Production, Technical University of Košice, Masiarska 74 St., 04001 Košice, SlovakiaFaculty of Mechanical Engineering, Department Technologies, Materials and Computer Aided Production, Technical University of Košice, Masiarska 74 St., 04001 Košice, SlovakiaLukasiewicz Research Network – Institute for Engineering of Polymer Materials and Dyes, M. Skłodowska-Curie 55 St., 87-100 Torun, PolandLublin University of Technology, Faculty of Mechanical Engineering, Department of Polymer Processing, Nadbystrzycka 36 St., 20-618 Lublin, PolandThe main operational characteristics of polyamide-6-montmorillonite (PA6/MMT) nanocomposites, which determine their fields of application, mainly depend on the crystal structure and crystallinity of the polymer. Therefore, the study of the crystalline behavior of PA6 in such nanocomposites is of considerable scientific and practical importance. In this work, the structure, crystalline, and thermal properties of nanocomposites based on PA6 and modified MMT prepared in a formic acid solution were investigated using the methods of differential scanning calorimetry (DSC) and X-ray Diffraction (XRD). It was established that during the manufacture of PA6/MMT nanocomposites in a solution, the dominant crystal structures are the thermodynamically stable α structures of PA6. The crystallinity degree of PA6 in nanocomposites is about 1.5 times higher than that of the original PA6. It is shown that after additional thermomechanical treatment of nanocomposites on a capillary viscometer at 230°С and a load of 5 kg, the uniformity of the distribution of exfoliated MMT in the polymer matrix increases, as a result of which the crystalline structure of PA6 changes and its glass transition and melting temperatures increase. These changes in the PA6 structure also have a significant impact on the melt flow index and the softening temperature of nanocomposites.http://www.astrj.com/Study-of-Crystalline-and-Thermal-Properties-of-Nanocomposites-Based-on-Polyamide,174180,0,2.htmlnanocompositespolyamidesthermal propertiescrystal structuresprocessing |
| spellingShingle | Volodymyr Krasinskyi Ludmila Dulebova Ivan Gajdoš Oksana Krasinska Tomasz Jachowicz Study of Crystalline and Thermal Properties of Nanocomposites Based on Polyamide-6 and Modified Montmorillonite Advances in Sciences and Technology nanocomposites polyamides thermal properties crystal structures processing |
| title | Study of Crystalline and Thermal Properties of Nanocomposites Based on Polyamide-6 and Modified Montmorillonite |
| title_full | Study of Crystalline and Thermal Properties of Nanocomposites Based on Polyamide-6 and Modified Montmorillonite |
| title_fullStr | Study of Crystalline and Thermal Properties of Nanocomposites Based on Polyamide-6 and Modified Montmorillonite |
| title_full_unstemmed | Study of Crystalline and Thermal Properties of Nanocomposites Based on Polyamide-6 and Modified Montmorillonite |
| title_short | Study of Crystalline and Thermal Properties of Nanocomposites Based on Polyamide-6 and Modified Montmorillonite |
| title_sort | study of crystalline and thermal properties of nanocomposites based on polyamide 6 and modified montmorillonite |
| topic | nanocomposites polyamides thermal properties crystal structures processing |
| url | http://www.astrj.com/Study-of-Crystalline-and-Thermal-Properties-of-Nanocomposites-Based-on-Polyamide,174180,0,2.html |
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