Journal of Radiation Research and Radiation Proces ›› 2017, Vol. 35 ›› Issue (4): 40302-040302.doi: 10.11889/j.1000-3436.2017.rrj.35.040302

• RADIATION CHEMISTRY • Previous Articles     Next Articles

Gamma radiation effects on polydimethylsiloxane in hydrogen peroxide solution

CAO Ke1, AO Yinyong2, CHEN Jian2, PENG Jing1, HUANG Wei2, LI Jiuqiang1, ZHAI Maolin1   

  1. 1. Beijing National Laboratory for Molecular Sciences, Radiochemistry and Radiation Chemistry Key Laboratory of Fundamental Science, the Key Laboratory of Polymer Chemistry and Physics of the Ministry of Education, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China;
    2. Institute of Nuclear Physics and Chemistry, China Academy of Engineering Physics, Mianyang 621900, China
  • Received:2017-03-13 Revised:2017-04-11 Online:2017-08-20 Published:2017-07-29
  • Supported by:

    Supported by National Natural Science Foundation (11575009)

Abstract:

The effect of γ-radiation (60Co γ-ray source) on polydimethylsiloxane (PDMS) rubber soaked in 6% hydrogen peroxide solution was investigated at room temperature. The mechanical properties of the virgin and irradiated PDMS were compared in terms of their tensile strength and the variations in their chemical structure. These properties were analyzed by differential scanning calorimetry (DSC), attenuated total reflection-Fourier transform infrared (ATR-FTIR) spectroscopy, and solvent swelling experiments. It was found that when PDMS was irradiated in 6% H2O2 solution, cross-linking reactions were predominant. Compared with the samples irradiated in air, PDMS irradiated in 6% H2O2 solution had a higher elongation at break and a lower elastic modulus, which suggested a lower cross-linking density. This may be attributed to the hydroxyl radicals generated from H2O2 during irradiation process, which capture the free radicals generated from PDMS and reduce the probability of the cross-linking reaction. The ATR-FTIR results showed that slight oxidation reactions occurred upon irradiation and the degree of surface oxidation of PDMS irradiated in 6% H2O2 does not significantly enhanced compared with the samples irradiated in air.

Key words: Polydimethylsiloxane, γ-radiation effects, Hydrogen peroxide solution

CLC Number: 

  • TL13