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DSC and FTIR study of the gamma radiation effect on cis-1,4-polyisoprene

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Abstract

The effect of γ-radiation on the cis-1,4-polyisoprene in the presence of oxygen is investigated by ATR-FTIR technique and non-isothermal DSC measurements. FTIR measurements have shown that the formation of hydroperoxides, ketones, alcohols and/or ethers is apparent already at lower, 20–50 kGy, doses of γ-radiation and it increases significantly with the exposure time. Besides, lactones, anhydrides, peresters, carboxylic acids, and esters are formed, too. Spectral changes in the region of C=C conjugated double bonds indicate a formation of shorter polyene structures and aromatic rings. Kinetic parameters describing the temperature dependence of the induction period have been obtained from DSC measurements using the isoconversional method. Residual stabilities have been calculated in order to characterize the gamma radiation effect on polyisoprene thermooxidative stability. Both methods proved that doses lower than 50 kGy do not cause severe changes in polymer properties.

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Authors and Affiliations

  1. Department of Physical Chemistry and Chemical Physics, Faculty of Chemical and Food Technology, Slovak University of Technology, Bratislava, Slovak Republic, 812 37, Radlinského 9

    Cibulková Zuzana, Polovková Júlia, Lukeš V. & Klein E.

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  1. Cibulková Zuzana
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  2. Polovková Júlia
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  3. Lukeš V.
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  4. Klein E.
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Correspondence to Klein E..

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Cibulková, Z., Polovková, J., Lukeš, V. et al. DSC and FTIR study of the gamma radiation effect on cis-1,4-polyisoprene. J Therm Anal Calorim 84, 709–713 (2006). https://doi.org/10.1007/s10973-005-7547-1

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  • DOI: https://doi.org/10.1007/s10973-005-7547-1

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