In this preliminary study, experimental segmented poly(siloxaneurethanes) of varying length segment, designed for medical scaffolds for tissue engineering were exposed to electron beam and gamma radiation.
The films of samples packed in double sterilization pouches were irradiated with standard dose of 28 kGy used for sterilization.
The samples were irradiated using accelerator type LAE 13/9 with nominal energy of 10 MeV and 60Co gamma ray source named Minejola 1000.
None inert gas was applied. The effect of radiation on radicals formation was investigated. ESR (Electron Spin Resonance) method was used for detection present of radicals in irradiated materials. There was no signals for samples irradiated in ambient temperature, so it was necessary to carry out analogical experiment in lower temperature. Some signals with different intensivity from paramagnetic spices were observed for samples irradiated in temperature of liquid nitrogen. In order to examine kinetics of formation and decay of radicals there were carried out same experiments in various temperatures from liquid nitrogen to ambient temperature.
In the same time there were observed no differences in IR and DRS (Diffuse Reflected Spectrofotometr) spectrum of radiated and irradiated samples. It can be result of the very fast recombination proces of new-created radicals. After modification selected poly(siloxaneurethanes) with scavengers of radicals there was observed decrease intensivity of signals in ESR spectrum.

• Legal notice:
  

  Copyright (c) Pielaszek Research, all rights reserved.
  The above materials, including auxiliary resources, are subject to Publisher's copyright and the Author(s) intellectual rights. Without limiting Author(s) rights under respective Copyright Transfer Agreement, no part of the above documents may be reproduced without the express written permission of Pielaszek Research, the Publisher. Express permission from the Author(s) is required to use the above materials for academic purposes, such as lectures or scientific presentations.
  In every case, proper references including Author(s) name(s) and URL of this webpage: https://science24.com/paper/893 must be provided.

1. Water-thinnable poly(urethanecarbamide) dispersions in die pressing of alumina
2. Silver Clusters in Molecular Sieves
3. Powder coatings modified with silicone-containing polymer particles of hybrid structure
4. Silicone-containing hybrid polymer dispersions designed for coating applications
5. Preliminary study on application PE filler modified by radiation
6. Influence of radiation sterilization process on properties of poly(siloxaneurethanes) used as scaffolds for tissue engineering.
7. Effect of polysiloxaneurethaneurea elastomer structure on free radical formation in sterillisation by E-beam/gamma irradiation