Utilize este identificador para referenciar este registo:
https://hdl.handle.net/1822/38883
Título: | Connecting free volume with shape memory properties in noncytotoxic gamma-irradiated polycyclooctene |
Autor(es): | Axpe, E. García-Huete, N. Cuevas, J. M. Ribeiro, C. Mérida, D. Laza, J. M., García, J. Á. Vilas, J. L. Lanceros-Méndez, S. Plazaola, F. Leõn, L. M. |
Palavras-chave: | free volume gamma-irradiated polycylooctene noncytotoxic polymers positron annihilation lifetime spectroscopy shape memory polymers |
Data: | 2015 |
Editora: | Wiley |
Revista: | Journal of Polymer Science, Part B: Polymer Physics |
Citação: | Axpe, E., Garcia-Huete, N., Maria Cuevas, J., Ribeiro, C., Merida, D., Manuel Laza, J., . . . Manuel Leon, L. (2015). Connecting free volume with shape memory properties in noncytotoxic gamma-irradiated polycyclooctene. Journal of Polymer Science Part B-Polymer Physics, 53(15), 1080-1088. doi: 10.1002/polb.23750 |
Resumo(s): | The free volume holes of a shape memory polymer have been analysed considering that the empty space between molecules is necessary for the molecular motion, and the shape memory response is based on polymer segments acting as molecular switches through variable flexibility with temperature or other stimuli. Therefore, thermomechanical analysis (TMA) and positron annihilation lifetime spectroscopy (PALS) have been applied to analyse shape recovery and free volume hole sizes in gamma irradiated polycyclooctene (PCO) samples, as a non-cytotoxic alternative to more conventional PCO crosslinked via peroxide for future applications in medicine. Thus, a first approach relating structure, free volume holes and shape memory properties in gamma irradiated PCO is presented. The results suggest that free volume holes caused by gamma irradiation in PCO samples facilitate the recovery process by improving movement of polymer chains and open t possibilities for the design and control of the macroscopic response. |
Tipo: | Artigo |
URI: | https://hdl.handle.net/1822/38883 |
DOI: | 10.1002/polb.23750 |
ISSN: | 0887-6266 |
e-ISSN: | 1099-0488 |
Arbitragem científica: | yes |
Acesso: | Acesso restrito UMinho |
Aparece nas coleções: | CDF - FCD - Artigos/Papers (with refereeing) |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
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Axpe_2015.pdf Acesso restrito! | 1,17 MB | Adobe PDF | Ver/Abrir |