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https://hdl.handle.net/1822/75484
Título: | Thermal degradation behavior of ionic liquid/ fluorinated polymer composites: Effect of polymer type and ionic liquid anion and cation |
Autor(es): | Dias, J. C. Correia, D. M. Costa, C. M. Botelho, G. Vilas-Vilela, J. L. Lanceros-Méndez, S. |
Palavras-chave: | Thermal degradation Polymer/IL composites Polymer IL IL composites |
Data: | 16-Ago-2021 |
Editora: | Elsevier |
Revista: | Polymer |
Citação: | Thermal degradation behavior of ionic liquid/ fluorinated polymer composites: Effect of polymer type and ionic liquid anion and cation; Dias, J.C., Correia, D.M., Costa, C.M., Botelho, G., Vilas-Vilela, J.L., Lanceros-Mendez, S.; (2021) Polymer, 229, art. no. 123995, . DOI: 10.1016/j.polymer.2021.123995 |
Resumo(s): | This work reports on the evaluation of the thermal degradation of poly(vinylidene fluoride) (PVDF) and PVDF co-polymer (PVDF-TrFE, PVDF-HFP and PVDF-CTFE) composite films with different imidazolium ionic liquids (ILs). The influence of the IL type, including cation and anion type, cation chain length and content up to 40 wt% were evaluated. Independently of the fluorinated polymer type, all neat samples present a single degradation step. Upon the incorporation of the IL [C2mim][TFSI] into the different polymers, a decrease in the thermal stability occurs, indicating the IL imidazolium interaction with the CH2-CF2 groups of the fluorinated matrix. Further, it was stablished that the thermal stability of the composite material decreases with increasing cation chain length. The Ozawa-Flynn-Wall and Kissinger models were applied to evaluate the activation energies of the samples during isothermal experiments, showing that the thermal degradation activation energy ranges from 161 ± 6 kJ.mol-1 ([C2mim][TFSI]/PVDF) to 131 ± 14 kJ.mol-1 ([C2mim][TFSI]/PVDF-CTFE). No large differences were observed on the effect of IL inclusion in PVDF, PVDF-TrFE, PVDF-HFP and PVDF-CTFE polymer matrices. |
Tipo: | Artigo |
URI: | https://hdl.handle.net/1822/75484 |
DOI: | 10.1016/j.polymer.2021.123995 |
ISSN: | 0032-3861 |
Versão da editora: | https://www.sciencedirect.com/science/article/pii/S0032386121006182 |
Arbitragem científica: | yes |
Acesso: | Acesso restrito UMinho |
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26.pdf Acesso restrito! | Thermal degradation behavior of ionic liquid/ fluorinated polymer composites: effect of polymer type and ionic liquid anion and cation | 1,24 MB | Adobe PDF | Ver/Abrir |