Irradiation effects in polycarbonate induced by 2.1 GeV Kr ions

LOW ENERGY ACCELERATOR, RAY TECHNOLOGY AND APPLICATIONS

Irradiation effects in polycarbonate induced by 2.1 GeV Kr ions

TIAN Hui-Xian，

JIN Yun-Fan，

ZHU Zhi-Yong，

SUN You-Mei，

WANG Zhi-Guang

Nuclear Science and Techniques

Vol.14, No.4

pp.242-245

Published in print 01 Nov 2003

CLC：O571.33,O631.3+4

29500

Polycarbonate foil stacks were irradiated with 2.1 GeV Kr ions under vacuum at room temperature. The modifications in chemical structure induced by the irradiation were studied by means of Fourier transform infrared (FTIR) and ultraviolet visible (UV/VIS) spectroscopies. FTIR measurements reveal that material degradations through bond breaking are the main effects. Alkyne end groups are produced by the irradiation. UV/VIS measurements indicate a shifting of the absorption edge from ultraviolet towards visible, and a strong increase of absorbance in the ultraviolet and visible regions. The changes in absorbance induced by the irradiation at wavelengths of 380 nm, 450 nm and 500 nm scale well with S_eⁿ (S_e is electronic energy loss) where the value of n increases from 1.69 to 2.02 with increasing of the wavelength. The results are briefly discussed.

PolycarbonateKr ionsMaterial degradations

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