CUED Publications database

Connecting free volume with shape memory properties in noncytotoxic gamma-irradiated polycyclooctene

Axpe, E and García-Huete, N and Cuevas, JM and Ribeiro, C and Mérida, D and Laza, JM and García, JÁ and Vilas, JL and Lanceros-Méndez, S and Plazaola, F and Leõn, LM (2015) Connecting free volume with shape memory properties in noncytotoxic gamma-irradiated polycyclooctene. Journal of Polymer Science, Part B: Polymer Physics, 53. pp. 1080-1088. ISSN 0887-6266

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Abstract

© 2015 Wiley Periodicals, Inc. The free volume holes of a shape memory polymer have been analyzed 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 analyze shape recovery and free volume hole sizes in gamma-irradiated polycyclooctene (PCO) samples, as a noncytotoxic 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 possibilities for the design and control of the macroscopic response.

Item Type: Article
Subjects: UNSPECIFIED
Divisions: Div C > Biomechanics
Depositing User: Cron Job
Date Deposited: 17 Jul 2017 19:16
Last Modified: 10 Aug 2017 01:37
DOI: