Radiation curing of silica for silica-rubber composites

• Autorzy: Dondi D. , Palamini C. , Pepori F. , Buttafava A. , Galinetto P. , Faucitano A.
• Konferencja: Proceedings of the International Conference on Recent Developments and Applications of Nuclear Technologies 15-17 September 2008, Białowieża, Poland
• Języki publikacji: EN

Abstrakty

EN

The functional modification of silica samples based on the reaction of “grafting” of polybutadiene olygomers carried out by gamma-irradiation in the presence of air at room temperature has been investigated. The yield of grafted PB reaches a maximum at doses of about 30 kGy, then decreases as a consequence of the oxidative degradation. The reaction is accompanied by the build up of carbonyls and peroxides up to 0.1 moles/kg and it leads to a rapid consumption of the double bonds concentration as determined by both FTIR and Raman spectroscopy. The results of the EPR analysis are diagnostic of a mechanism of immobilization of the olygomer based on cross-linking of polybutadiene which is initiated by the SiO2 radiolytic species. Depending on the nature of the SiO2 species, the mechanism of initiation leads to immobilized PB either really grafted to the silica surface or simply physically absorbed.

Słowa kluczowe

EN

radiation; silica-rubber composites; modified silica

• Wydawca: Institute of Nuclear Chemistry and Technology
• Czasopismo: Nukleonika
• Rocznik: 2009
• Tom: Vol. 54, No. 2
• Strony: 71--75
• Opis fizyczny: Bibliogr. 10 poz., rys.

Twórcy

autor

Dondi D.

autor

Palamini C.

autor

Pepori F.

autor

Buttafava A.

autor

Galinetto P.

autor

Faucitano A.

• General Chemistry Department, University of Pavia, Via Taramelli 12, 27100 Pavia, Italy, Tel.: [phone], Fax: [phone],

Bibliografia

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