Journal
EUROPEAN POLYMER JOURNAL
Volume 108, Issue -, Pages 406-411Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.eurpolymj.2018.09.025
Keywords
Polycarbonate; Ion track; Ion irradiation; Small angle scattering
Categories
Funding
- Australian Centre for Neutron Scattering
- Australian Nuclear Science and Technology Organisation
- Australian Research Council
- CONACyT (Mexico)
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Ion tracks created in polycarbonate foils by irradiation with 2.2 GeV Au ions were characterized using a combination of small-angle x-ray and neutron scattering (SAXS/SANS) and Fourier transform infrared spectroscopy (FTIR). The ion tracks were found to consist of a cylindrical damage core with a radius of similar to 2.5 +/- 0.2 nm and a relative density approximately 5% below that of the pristine polycarbonate. Upon exposure to thermal annealing between 100 and 200 degrees C, the tracks were observed to double in size. Simultaneously, this led to a recovery in the density of the ion track, reaching a value just below that of the pristine polymer. A mechanism is proposed that explains this behavior by diffusion of radiolysis products/material flow into the under-dense track core from the surrounding region. Treatment of the tracks with UV radiation has shown no significant change in the track structure and size.
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