V. А. Sharapova, V. P. Shveykin, I.G. Margamov, V. Yu. Ivanov, O. V. Ryabukhin

INFRARED SPECTROSCOPY FOR EVALUATING THE EFFECT OF ELECTRON BEAM STERILIZATION ON POLYETHYLENE TEREPHTHALATE MEDICAL TUBES

The paper studies the effect of electron beam sterilization on the polyethylene terephthalate parts of blood sampling systems. The structural state and crystallinity degree of polyethylene terephthalate are estimated from the analysis of infrared spectra. Relative intensities are calculated by the reference band (overall intensity level) at 1410 cm−1. The Gaussian intensities of the absorption bands for trans and gauche conformations with respect to reference band at 1505 cm–1 are calculated. The spectral coefficients D973/D795, D848/D795, D1042/D795, D895/D795, D1098/D1370, and D1255/D1370 are determined. The dose of up to 25 kGy has no significant effect on either the ratio of integral intensities or the ratio of trans and gauche conformations.

Acknowledgment: The work was supported by the IAEA, contract CRP F23035.

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