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A simple and rapid method to improve the hydrophily of cyclic olefin copolymer (COC) using UV irradiations.
Grafting of a bioactive polymer on COC to allow a better integration of the implant.
Characterization of the grafting of bioactive polymers on COC surfaces.
To improve the hydrophilicity of cyclic olefin copolymer, a simple and rapid method using two-stage with ultraviolet irradiation was developed in order to graft a bioactive polymer on the surface of these polymers.
Materials and Methods
A bioactive polymer, poly(sodium styrene sulfonate) was grafting in two step on the cyclic olefin copolymer surface. The process consists to activate the surface with ozone and grafting to under UV irradiation in presence of sodium styrene sulfonate. The presence of polymer on the surfaces was characterized by water contact angle, Fourier transform infrared spectroscopy, scanning electron microscopy with energy dispersive spectroscopy and the quantity of polymer grafted was determined by a colorimetric method.
First, the time of UV irradiation for the grafting was studied. The results showed that the maximum grafting rate is reached after 60 minutes of reaction. Second, the influence of the presence of additive on the grafting was investigated. The degree of grafting is significantly reduced compared to a sample without additive.
We have developed a simple and fast method to graft a hydrophilic and bioactive polymer covalently to a COC surface.Le texte complet de cet article est disponible en PDF.
Keywords : Cyclic olefin polymer, UV irradiation, Polymer grafting