Abstract
A new polyimide containing alicyclic units is investigated in regard to a fully aromatic commercial one in order to assess their hemocompatibility. The rheological, structural, and surface properties of these two polyimides are analyzed by infrared spectroscopy and contact angle measurements. Flow activation energy of polyimide solutions is almost doubled when passing from 8 to 16 %, as an indicative of chain entanglement which enhances film formation ability. The surface tension components are obtained using the Fowkes method, revealing a slightly lower polar component (20.19 mN/m) for the semi-alicyclic polyimide, comparative with the aromatic one (22.52 mN/m). The hemocompatibility is theoretically established from calculation of the spreading work of blood cells and proteins on the polymer surface. The reduced polarizability and high flexibility of the alicyclic units from the new polyimide lead to improved hemocompatibility, as observed from the higher cohesion of blood components with this sample surface, comparative with the aromatic one.
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This work was supported by a grant from the Romanian National Authority for Scientific Research and Innovation, CNCS–UEFISCDI, project PN-II-RU-TE-2014-4-2976, no. 256/1.10.2015.
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Buruiana, L.I., Barzic, A.I., Stoica, I. et al. Evaluation of blood cells and proteins spreading on imidic polymers containing alicyclic sequences. J Polym Res 23, 217 (2016). https://doi.org/10.1007/s10965-016-1110-6
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DOI: https://doi.org/10.1007/s10965-016-1110-6