Evaluation of Thermal Decomposition Kinetics of Poly (Lactic Acid)/Ethylene Elastomer (EE) Blends
The influences of ethylene-based elastomer (EE) and the compatibilizer agent ethylene-butyl acrylate-glycidyl methacrylate (EBAGMA) on the thermal degradation of PLA/EE blends were evaluated by the thermal degradation kinetics and thermodynamic parameters using thermogravimetry. The presence of EE a...
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-11-01
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| Series: | Polymers |
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| Online Access: | https://www.mdpi.com/2073-4360/15/21/4324 |
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| author | Giordano P. Bernardes Matheus P. Andrade Matheus Poletto Nathália R. Luiz Ruth M. C. Santana Maria M. de C. Forte |
| author_facet | Giordano P. Bernardes Matheus P. Andrade Matheus Poletto Nathália R. Luiz Ruth M. C. Santana Maria M. de C. Forte |
| author_sort | Giordano P. Bernardes |
| collection | DOAJ |
| description | The influences of ethylene-based elastomer (EE) and the compatibilizer agent ethylene-butyl acrylate-glycidyl methacrylate (EBAGMA) on the thermal degradation of PLA/EE blends were evaluated by the thermal degradation kinetics and thermodynamic parameters using thermogravimetry. The presence of EE and EBAGMA synergistically improved the PLA thermal stability. The temperature of 10% of mass loss (T<sub>10%</sub>) of PLA was around 365 °C, while in the compatibilized PLA/EE blend, this property increased to 370 °C. The PLA average activation energy (<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mover accent="true"><mrow><msub><mrow><mi mathvariant="normal">E</mi></mrow><mrow><mi mathvariant="normal">a</mi></mrow></msub></mrow><mo>¯</mo></mover></mrow></semantics></math></inline-formula>) reduced in the PLA/EE blend (from 96 kJ/mol to 78 kJ/mol), while the presence of EBAGMA in the PLA/EE blend increased the <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mover accent="true"><mrow><msub><mrow><mi mathvariant="normal">E</mi></mrow><mrow><mi mathvariant="normal">a</mi></mrow></msub></mrow><mo>¯</mo></mover></mrow></semantics></math></inline-formula> due to a better blend compatibilization. The solid-state thermal degradation of the PLA and PLA/EE blends was classified as a D-type degradation mechanism. In general, the addition of EE increased the thermodynamic parameters when compared to PLA and the compatibilized blend due to the increase in the collision rate between the components over the thermal decomposition. |
| first_indexed | 2024-03-11T11:22:13Z |
| format | Article |
| id | doaj.art-564cb7ed87ac409ea202ab7ea6094460 |
| institution | Directory Open Access Journal |
| issn | 2073-4360 |
| language | English |
| last_indexed | 2024-03-11T11:22:13Z |
| publishDate | 2023-11-01 |
| publisher | MDPI AG |
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| series | Polymers |
| spelling | doaj.art-564cb7ed87ac409ea202ab7ea60944602023-11-10T15:10:55ZengMDPI AGPolymers2073-43602023-11-011521432410.3390/polym15214324Evaluation of Thermal Decomposition Kinetics of Poly (Lactic Acid)/Ethylene Elastomer (EE) BlendsGiordano P. Bernardes0Matheus P. Andrade1Matheus Poletto2Nathália R. Luiz3Ruth M. C. Santana4Maria M. de C. Forte5Department of Mechatronic Engineering, Atlantic Technological University (ATU) Sligo, Ash Lane, F91 YW50 Sligo, IrelandPostgraduate Program in Engineering of Processes and Technologies (PGEPROTEC), University of Caxias Do Sul (UCS), Caxias Do Sul 95070-560, BrazilPostgraduate Program in Engineering of Processes and Technologies (PGEPROTEC), University of Caxias Do Sul (UCS), Caxias Do Sul 95070-560, BrazilLaboratory of Polymeric Materials (LAPOL), School of Engineering, Federal University of Rio Grande do Sul (UFRGS), Porto Alegre 90010-150, BrazilLaboratory of Polymeric Materials (LAPOL), School of Engineering, Federal University of Rio Grande do Sul (UFRGS), Porto Alegre 90010-150, BrazilLaboratory of Polymeric Materials (LAPOL), School of Engineering, Federal University of Rio Grande do Sul (UFRGS), Porto Alegre 90010-150, BrazilThe influences of ethylene-based elastomer (EE) and the compatibilizer agent ethylene-butyl acrylate-glycidyl methacrylate (EBAGMA) on the thermal degradation of PLA/EE blends were evaluated by the thermal degradation kinetics and thermodynamic parameters using thermogravimetry. The presence of EE and EBAGMA synergistically improved the PLA thermal stability. The temperature of 10% of mass loss (T<sub>10%</sub>) of PLA was around 365 °C, while in the compatibilized PLA/EE blend, this property increased to 370 °C. The PLA average activation energy (<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mover accent="true"><mrow><msub><mrow><mi mathvariant="normal">E</mi></mrow><mrow><mi mathvariant="normal">a</mi></mrow></msub></mrow><mo>¯</mo></mover></mrow></semantics></math></inline-formula>) reduced in the PLA/EE blend (from 96 kJ/mol to 78 kJ/mol), while the presence of EBAGMA in the PLA/EE blend increased the <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mover accent="true"><mrow><msub><mrow><mi mathvariant="normal">E</mi></mrow><mrow><mi mathvariant="normal">a</mi></mrow></msub></mrow><mo>¯</mo></mover></mrow></semantics></math></inline-formula> due to a better blend compatibilization. The solid-state thermal degradation of the PLA and PLA/EE blends was classified as a D-type degradation mechanism. In general, the addition of EE increased the thermodynamic parameters when compared to PLA and the compatibilized blend due to the increase in the collision rate between the components over the thermal decomposition.https://www.mdpi.com/2073-4360/15/21/4324PLApolymer blendscompatibilizationthermal propertiessolid-state reaction |
| spellingShingle | Giordano P. Bernardes Matheus P. Andrade Matheus Poletto Nathália R. Luiz Ruth M. C. Santana Maria M. de C. Forte Evaluation of Thermal Decomposition Kinetics of Poly (Lactic Acid)/Ethylene Elastomer (EE) Blends Polymers PLA polymer blends compatibilization thermal properties solid-state reaction |
| title | Evaluation of Thermal Decomposition Kinetics of Poly (Lactic Acid)/Ethylene Elastomer (EE) Blends |
| title_full | Evaluation of Thermal Decomposition Kinetics of Poly (Lactic Acid)/Ethylene Elastomer (EE) Blends |
| title_fullStr | Evaluation of Thermal Decomposition Kinetics of Poly (Lactic Acid)/Ethylene Elastomer (EE) Blends |
| title_full_unstemmed | Evaluation of Thermal Decomposition Kinetics of Poly (Lactic Acid)/Ethylene Elastomer (EE) Blends |
| title_short | Evaluation of Thermal Decomposition Kinetics of Poly (Lactic Acid)/Ethylene Elastomer (EE) Blends |
| title_sort | evaluation of thermal decomposition kinetics of poly lactic acid ethylene elastomer ee blends |
| topic | PLA polymer blends compatibilization thermal properties solid-state reaction |
| url | https://www.mdpi.com/2073-4360/15/21/4324 |
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