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Registro Completo |
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Biblioteca(s): |
Embrapa Instrumentação. |
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Data corrente: |
08/11/2021 |
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Data da última atualização: |
22/11/2022 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
REIS, I. A.; CLARO, P. I. C.; MARCOMINI, A. L.; MATTOSO, L. H. C.; SILVA, S. P. da; SENA NETO, A. R. de. |
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Afiliação: |
LUIZ HENRIQUE CAPPARELLI MATTOSO, CNPDIA. |
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Título: |
Annealing and crystallization kinetics of poly(lactic acid) pieces obtained by additive manufacturing. |
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Ano de publicação: |
2021 |
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Fonte/Imprenta: |
Polymer Engineering Science, v. 61, 2021. |
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Páginas: |
2097-2104 |
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ISSN: |
1548-2634 |
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DOI: |
10.1002/pen.25737 |
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Idioma: |
Inglês |
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Conteúdo: |
In this study, we investigated the influence of isothermal treatment of poly(lactic acid) (PLA) 3D printed samples at different crystallization temperatures. In this case, we analyzed the effect of each crystallization temperature on spherulites formation in printed PLA, affecting the final mechanical properties of pieces. For such, the thermomechanical properties, morphological structure, and crystallization kinetics were analyzed before and after thermal treatment. The 3D printed samples were heat treated at 80C, 90C, 100C, 110C, and 119C. With annealing, we observed an improvement in the mechanical PLA properties; however, the exothermic crystallization peak was different for the samples. Pieces before annealing were found to have a low crystallinity index (Ic) of 2%–7%, and the pieces after annealing presented a considerable Ic (27%–34%). Annealing temperatures of 100C, 110C, and 119C produced the fastest crystallization kinetics, while annealing temperatures of 80C and 90C resulted in the lowest crystallization kinetics for complete crystallization. After annealing, improvement in the flexural strength (34%–47%) and Young's modulus (26%–51%) for all annealed pieces occurred. The appropriate condition was observed at 100C, which was the onset temperature of crystallization, owing to the combination of the shorter time of crystallization with the increased mechanical properties |
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Palavras-Chave: |
Crystallization kinetics; Filament structure-property relations; Thermal annealing. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02186naa a2200253 a 4500
001 2135888
005 2022-11-22
008 2021 bl uuuu u00u1 u #d
022 $a1548-2634
024 7 $a10.1002/pen.25737$2DOI
100 1 $aREIS, I. A.
245 $aAnnealing and crystallization kinetics of poly(lactic acid) pieces obtained by additive manufacturing.$h[electronic resource]
260 $c2021
300 $a2097-2104
520 $aIn this study, we investigated the influence of isothermal treatment of poly(lactic acid) (PLA) 3D printed samples at different crystallization temperatures. In this case, we analyzed the effect of each crystallization temperature on spherulites formation in printed PLA, affecting the final mechanical properties of pieces. For such, the thermomechanical properties, morphological structure, and crystallization kinetics were analyzed before and after thermal treatment. The 3D printed samples were heat treated at 80C, 90C, 100C, 110C, and 119C. With annealing, we observed an improvement in the mechanical PLA properties; however, the exothermic crystallization peak was different for the samples. Pieces before annealing were found to have a low crystallinity index (Ic) of 2%–7%, and the pieces after annealing presented a considerable Ic (27%–34%). Annealing temperatures of 100C, 110C, and 119C produced the fastest crystallization kinetics, while annealing temperatures of 80C and 90C resulted in the lowest crystallization kinetics for complete crystallization. After annealing, improvement in the flexural strength (34%–47%) and Young's modulus (26%–51%) for all annealed pieces occurred. The appropriate condition was observed at 100C, which was the onset temperature of crystallization, owing to the combination of the shorter time of crystallization with the increased mechanical properties
653 $aCrystallization kinetics
653 $aFilament structure-property relations
653 $aThermal annealing
700 1 $aCLARO, P. I. C.
700 1 $aMARCOMINI, A. L.
700 1 $aMATTOSO, L. H. C.
700 1 $aSILVA, S. P. da
700 1 $aSENA NETO, A. R. de
773 $tPolymer Engineering Science$gv. 61, 2021.
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