Positron annihilation studies of gamma irradiation effects on UV-cured polymers based on acrylate oligomers

• Autorzy: Hyla M. , Filipecki J. , Świątek J. , Mervinskii R. I.
• Języki publikacji: EN

Abstrakty

EN

Positron annihilation Iifetime spectroscopy is applied to the study of gamma irradiation effect on polymers based on the acrylate oligomers. The gamma irradiation of Co⁶⁰ was carried out in air, with a flux of 20 Gy s^{-1. The measurements were made on specimens with different absorbed dose in the range 10-100 kGy. The longest lifetime, τ}₃, in three-component analyses of the spectra was associated with the pickoff annihilation of ortopositronium trapped in voids. After irradiation changes in the lifetimes are observed. The intensity of the longest-Iived component, I₃, increases in comparison with the as-received sample. These results are discussed on the basis of free volume model.

Słowa kluczowe

EN

positron; gamma irradiation; polymers; acrylate oligomers

PL

pozyton; promieniowanie gamma; polimery; oligomery akrylanowe

• Wydawca: Wydawnictwo Wyższej Szkoły Pedagogicznej w Częstochowie
• Czasopismo: Prace Naukowe. Chemia / Wyższa Szkoła Pedagogiczna w Częstochowie
• Rocznik: 2001
• Tom: Vol. 5
• Strony: 155--159
• Opis fizyczny: Bibliogr. 4 poz., rys., tab.

Twórcy

autor

Hyla M.

• lnstitute of Physics, Pedagogical University, Al. Armii Krajowej 13/15,42 201 Częstochowa, Poland

autor

Filipecki J.

• lnstitute of Physics, Pedagogical University, Al. Armii Krajowej 13/15,42 201 Częstochowa, Poland

autor

Świątek J.

• lnstitute of Physics, Pedagogical University, Al. Armii Krajowej 13/15,42 201 Częstochowa, Poland

autor

Mervinskii R. I.

• Ukrainian Academy of Printing, Pidholosko 19, 290020 Lviv, Ukraine

Bibliografia

• [1] Jean Y.C., Microchem. J. 42 72 (1990).
• [2] Jean Y.C., Sandreczki T.C. and Ames D.P., J. Polym. Sci. B24 1247 (1986).
• [3] Hyla M., Filipecki J., Mandecki Z., Mervinskii R.I., J. Non-Cryst Solids 232-234 446 (1998).
• [4] Kansy J., NucI. Instr. Meth. A.374 235 (1996).