The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
When silica/polybutadiene and silica/styrene-butadiene are submitted to γ irradiation at 77 K a scavenging of the silica radiolytic species by absorbed vinyl units takes place at the surface with concomitant grafting and crosslinking of the polymers. Key intermediate in such reactions are SiO 2 -bonded radicals of structure SiO 2 –C • (CH 3 )CH(R)(R′). The role of silica...
Structural changes in commercial polyethylene terephthalate subjected to γ-irradiation were investigated by means of differential scanning calorimetry, viscosity measurements and positron annihilation lifetime spectroscopy. Irradiated samples show a lower molecular weight and increased crystallinity, which are attributed to chain scissions of the macromolecules. Positron results support such an interpretation...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.