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TitleConnecting free volume with shape memory properties in noncytotoxic gamma-irradiated polycyclooctene
Author(s)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.
Keywordsfree volume
gamma-irradiated polycylooctene
noncytotoxic polymers
positron annihilation lifetime spectroscopy
shape memory polymers
Issue date2015
JournalJournal of Polymer Science, Part B: Polymer Physics
CitationAxpe, 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
Abstract(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.
AccessRestricted access (UMinho)
Appears in Collections:CDF - FCD - Artigos/Papers (with refereeing)

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