Specific Impact of the Layered Nanomodifiers—Graphene Nanoplates, and Na + Montmorillonite on Thermal Degradation of Polylactic Acid: Mechanism and Kinetics.
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| Title: | Specific Impact of the Layered Nanomodifiers—Graphene Nanoplates, and Na + Montmorillonite on Thermal Degradation of Polylactic Acid: Mechanism and Kinetics. |
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| Authors: | Lomakin, Sergey1,2 (AUTHOR) koverlena@list.ru, Koverzanova, Elena1,2 (AUTHOR), Usachev, Sergey1,2,3 (AUTHOR), Shilkina, Natalia1,2 (AUTHOR), Khvatov, Anatoliy2 (AUTHOR), Erina, Natalia1,3 (AUTHOR), Rogovina, Svetlana1 (AUTHOR), Kuznetsova, Olga1 (AUTHOR), Siracusa, Valentina3 (AUTHOR), Berlin, Alexander1 (AUTHOR), Iordanskii, Alexey1 (AUTHOR) |
| Source: | Polymers (20734360). Feb2026, Vol. 18 Issue 3, p347. 22p. |
| Subjects: | Polylactic acid, Pyrolysis kinetics, Thermogravimetry, Graphene, Thermolysis, Catalysis, Montmorillonite, Nanostructured materials |
| Abstract: | The aim of this study is to investigate the impact of layered nanomodifiers with distinct chemical structure and morphology, namely graphene nanoplates (GnP) and sodium montmorillonite (Na-MMT), on thermal degradation of polylactic acid (PLA). The exploration was performed with thermogravimetric analysis (TGA), differential scanning calorimetry (DSC), and pyrolytic gas chromatography–mass spectrometry (PyGCMS). The findings revealed a catalytic effect of Na-MMT on PLA thermal destabilization, manifested in accelerated degradation and the notable change in the composition of pyrolysis products. In contrast, the incorporation of graphene nanoplates into the PLA matrix induced a "barrier effect": it imposed diffusion limitations on the emission of volatile degradation products during pyrolysis, which enhanced the thermal stability of the PLA/GnP composite and led to quantitative alterations in the distribution of major pyrolysis products. To elucidate the underlying degradation pathways, authors proposed a model kinetic analysis of thermal degradation for both PLA/GnP and PLA/Na-MMT composites. The analysis clearly distinguished the mechanistic differences between the two systems: while Na-MMT promotes catalytic decomposition, GnP primarily acts as the physical barrier retarding mass transport and delaying the thermal degradation development. Good alignment of theoretical model–kinetic predictions with Pyrolysis–GC/MS observations confirms the robustness of the suggested kinetic modeling method. [ABSTRACT FROM AUTHOR] |
| Copyright of Polymers (20734360) is the property of MDPI and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
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| Header | DbId: egs DbLabel: Engineering Source An: 191587387 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Specific Impact of the Layered Nanomodifiers—Graphene Nanoplates, and Na + Montmorillonite on Thermal Degradation of Polylactic Acid: Mechanism and Kinetics. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Lomakin%2C+Sergey%22">Lomakin, Sergey</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<i> koverlena@list.ru</i><br /><searchLink fieldCode="AR" term="%22Koverzanova%2C+Elena%22">Koverzanova, Elena</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Usachev%2C+Sergey%22">Usachev, Sergey</searchLink><relatesTo>1,2,3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Shilkina%2C+Natalia%22">Shilkina, Natalia</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Khvatov%2C+Anatoliy%22">Khvatov, Anatoliy</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Erina%2C+Natalia%22">Erina, Natalia</searchLink><relatesTo>1,3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Rogovina%2C+Svetlana%22">Rogovina, Svetlana</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Kuznetsova%2C+Olga%22">Kuznetsova, Olga</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Siracusa%2C+Valentina%22">Siracusa, Valentina</searchLink><relatesTo>3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Berlin%2C+Alexander%22">Berlin, Alexander</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Iordanskii%2C+Alexey%22">Iordanskii, Alexey</searchLink><relatesTo>1</relatesTo> (AUTHOR) – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Polymers+%2820734360%29%22">Polymers (20734360)</searchLink>. Feb2026, Vol. 18 Issue 3, p347. 22p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Polylactic+acid%22">Polylactic acid</searchLink><br /><searchLink fieldCode="DE" term="%22Pyrolysis+kinetics%22">Pyrolysis kinetics</searchLink><br /><searchLink fieldCode="DE" term="%22Thermogravimetry%22">Thermogravimetry</searchLink><br /><searchLink fieldCode="DE" term="%22Graphene%22">Graphene</searchLink><br /><searchLink fieldCode="DE" term="%22Thermolysis%22">Thermolysis</searchLink><br /><searchLink fieldCode="DE" term="%22Catalysis%22">Catalysis</searchLink><br /><searchLink fieldCode="DE" term="%22Montmorillonite%22">Montmorillonite</searchLink><br /><searchLink fieldCode="DE" term="%22Nanostructured+materials%22">Nanostructured materials</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: The aim of this study is to investigate the impact of layered nanomodifiers with distinct chemical structure and morphology, namely graphene nanoplates (GnP) and sodium montmorillonite (Na-MMT), on thermal degradation of polylactic acid (PLA). The exploration was performed with thermogravimetric analysis (TGA), differential scanning calorimetry (DSC), and pyrolytic gas chromatography–mass spectrometry (PyGCMS). The findings revealed a catalytic effect of Na-MMT on PLA thermal destabilization, manifested in accelerated degradation and the notable change in the composition of pyrolysis products. In contrast, the incorporation of graphene nanoplates into the PLA matrix induced a "barrier effect": it imposed diffusion limitations on the emission of volatile degradation products during pyrolysis, which enhanced the thermal stability of the PLA/GnP composite and led to quantitative alterations in the distribution of major pyrolysis products. To elucidate the underlying degradation pathways, authors proposed a model kinetic analysis of thermal degradation for both PLA/GnP and PLA/Na-MMT composites. The analysis clearly distinguished the mechanistic differences between the two systems: while Na-MMT promotes catalytic decomposition, GnP primarily acts as the physical barrier retarding mass transport and delaying the thermal degradation development. Good alignment of theoretical model–kinetic predictions with Pyrolysis–GC/MS observations confirms the robustness of the suggested kinetic modeling method. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Polymers (20734360) is the property of MDPI and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.3390/polym18030347 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 22 StartPage: 347 Subjects: – SubjectFull: Polylactic acid Type: general – SubjectFull: Pyrolysis kinetics Type: general – SubjectFull: Thermogravimetry Type: general – SubjectFull: Graphene Type: general – SubjectFull: Thermolysis Type: general – SubjectFull: Catalysis Type: general – SubjectFull: Montmorillonite Type: general – SubjectFull: Nanostructured materials Type: general Titles: – TitleFull: Specific Impact of the Layered Nanomodifiers—Graphene Nanoplates, and Na + Montmorillonite on Thermal Degradation of Polylactic Acid: Mechanism and Kinetics. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Lomakin, Sergey – PersonEntity: Name: NameFull: Koverzanova, Elena – PersonEntity: Name: NameFull: Usachev, Sergey – PersonEntity: Name: NameFull: Shilkina, Natalia – PersonEntity: Name: NameFull: Khvatov, Anatoliy – PersonEntity: Name: NameFull: Erina, Natalia – PersonEntity: Name: NameFull: Rogovina, Svetlana – PersonEntity: Name: NameFull: Kuznetsova, Olga – PersonEntity: Name: NameFull: Siracusa, Valentina – PersonEntity: Name: NameFull: Berlin, Alexander – PersonEntity: Name: NameFull: Iordanskii, Alexey IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 02 Text: Feb2026 Type: published Y: 2026 Identifiers: – Type: issn-print Value: 20734360 Numbering: – Type: volume Value: 18 – Type: issue Value: 3 Titles: – TitleFull: Polymers (20734360) Type: main |
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