Volume 47 Issue 10
Oct.  2018
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Zhang Xiansheng, Chang Tianying, Cui Hongliang, Yang Xiuwei, Liu Lingyu, Zhang Yanbo. Terahertz dielectric spectroscopy of natural vulcanized rubber by thermal oxidation[J]. Infrared and Laser Engineering, 2018, 47(10): 1025002-1025002(6). doi: 10.3788/IRLA201847.1025002
Citation: Zhang Xiansheng, Chang Tianying, Cui Hongliang, Yang Xiuwei, Liu Lingyu, Zhang Yanbo. Terahertz dielectric spectroscopy of natural vulcanized rubber by thermal oxidation[J]. Infrared and Laser Engineering, 2018, 47(10): 1025002-1025002(6). doi: 10.3788/IRLA201847.1025002
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Terahertz dielectric spectroscopy of natural vulcanized rubber by thermal oxidation

doi: 10.3788/IRLA201847.1025002
  • 1.

    Key Laboratory of UWB and THz(Incubating),Institute of Automation Shandong Academy of Sciences,Qilu University of Technology(Shandong Academy of Sciences),Jinan 250014,China;

  • 2.

    College of Instrumentation & Electrical Engineering,Jilin University,Changchun 130061,China

  • Received Date: 2018-05-10
  • Rev Recd Date: 2018-06-20
  • Publish Date: 2018-10-25
  • The aging of natural rubber products is a common phenomenon in its use, and the essence of aging is that the material itself is flawed and easily affected by external factors. Dielectric spectrum is a macroscopic manifestation of micro-polarization which is the dependence of dielectric constant on electromagnetic frequency or temperature. According to the plastic/rubber hot air aging standard GB/T3512-2014, the thermal oxygen experiment of natural vulcanized rubber was carried out in the experimental chamber of 100℃ for more than 1 000 hours, and the relationship between the dielectric spectrum of samples and aging time was studied. By tracking test, the effective data of complex permittivity and loss tangent value of 0.2-1.2 THz rubber were obtained every 24 hours. Based on the complex permittivity values, the polarization characteristics of the deduced rubber and the statistical microcosmic movement types can be calculated, and the molecular structure changes of the natural vulcanizates characterized by terahertz dielectric spectrum were analyzed. Due to the similarity of the aging of the material, the results can also play a positive role in studying other polymer materials aging.
  • [1] Komethi M, Othman N, Ismail H, et al. Comparative study on natural antioxidant as an aging retardant for natural rubber vulcanizates[J]. Journal of Applied Polymer Science, 2012, 124(2):1490-1500.
    [2] Ortizserna P, Dazcalleja R, Sanchis M J, et al. Dynamics of natural rubber as a function of frequency, temperature, and pressure. A dielectric spectroscopy investigation[J]. Macromolecules, 2010, 43(11):5094-5102.
    [3] Cardona J, Rui F, Sweatman M B, et al. Molecular dynamics simulations for the prediction of the dielectric spectra of alcohols, glycols and monoethanolamine[J]. Molecular Simulation, 2016, 42(5):370-390.
    [4] Botros S H, Eid M A M, Nageeb Z A. Thermal stability and dielectric relaxation of natural rubber/soda lignin and natural rubber/thiolignin composites[J]. Journal of Applied Polymer Science, 2006, 99(5):2504-2511.
    [5] Xu Zheng, Ye Qiang. Optimal design of a portable arc-shaped NMR sensor and its application in the aging-level detection of silicone rubber insulator[J]. Applied Magnetic Resonance, 2015, 47(2):175-189.
    [6] Hernndez M, Carreterogonzlez J, Verdejo R, et al. Molecular dynamics of natural rubber/Layered silicate nanocomposites as studied by dielectric relaxation spectroscopy[J]. Macromolecules, 2010, 43(2):643-651.
    [7] Zhou Xiaodan, Li Lijuan, Zhao Duo, et al. Application of terahertz technology in nondestructive testing of ceramic matrix composite defects[J]. Infrared and Laser Engineering, 2016, 45(8):0825001. (in Chinese)
    [8] Luo Z W, Gu X A, Zhu W C, et al. Optical properties of GaSe:S crystals in terahertz frequency range[J]. Opt Precision Eng, 2011, 19(2):354-359. (in Chinese)
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    [10] Fischer B M, Wietzke S, Reuter M. Investigating material characteristics and morphology of polymers using terahertz technologies[J]. IEEE Transactions on Terahertz Science and Technology, 2013, 3(3):259-268.
    [11] E Yiwen, Huang Yuanyuan, Xu Xinlong, et al. Polarization sensitive terahertz measurements and applications[J]. Chinese Optics, 2011, 19(2):354-359. (in Chinese)
    [12] Peiponen K E, Zeitler A, Kuwata-Gonokami M. Terahertz Spectroscopy and Imaging[M]. Berlin:Springer, 2013:327-334.
    [13] Yang Mingbo, Tang Zhiyu. China Materials Engineering Ceremony, Volume 7th:Polymer Material Engineering (Second Volume)[M]. Beijing:Chemical Industry Process, 2006:189-198. (in Chinese)
    [14] Cunneen J I. Oxidative aging of natural rubber[J]. Rubber Chemistry Technology, 1968, 41(1):182-208.
    [15] Blackman E J, Mccall E B. Relationships between the structures of natural rubber vulcanizates and their thermal and oxidative aging[J]. Rubber Chemistry Technology, 1970, 43(3):651-663.
    [16] Vassilikou-Dova A, Kalogeras I M. Dielectric Analysis (DEA). Thermal Analysis of Polymers, Fundamentals and Applications[M]. Hoboken:John Wiley Sons, 2009:497-613.
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    [18] Chen Xiliang, Chen Xin, Zhu Zhiyong. THz-TDS spectra study of polymer materials with different polarity[J]. J Infrared Millim Waves, 2013, 32(2):150-153. (in Chinese)
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Terahertz dielectric spectroscopy of natural vulcanized rubber by thermal oxidation

doi: 10.3788/IRLA201847.1025002
  • 1. Key Laboratory of UWB and THz(Incubating),Institute of Automation Shandong Academy of Sciences,Qilu University of Technology(Shandong Academy of Sciences),Jinan 250014,China;
  • 2. College of Instrumentation & Electrical Engineering,Jilin University,Changchun 130061,China
  • Received Date: 2018-05-10
  • Rev Recd Date: 2018-06-20
  • Publish Date: 2018-10-25

Abstract: The aging of natural rubber products is a common phenomenon in its use, and the essence of aging is that the material itself is flawed and easily affected by external factors. Dielectric spectrum is a macroscopic manifestation of micro-polarization which is the dependence of dielectric constant on electromagnetic frequency or temperature. According to the plastic/rubber hot air aging standard GB/T3512-2014, the thermal oxygen experiment of natural vulcanized rubber was carried out in the experimental chamber of 100℃ for more than 1 000 hours, and the relationship between the dielectric spectrum of samples and aging time was studied. By tracking test, the effective data of complex permittivity and loss tangent value of 0.2-1.2 THz rubber were obtained every 24 hours. Based on the complex permittivity values, the polarization characteristics of the deduced rubber and the statistical microcosmic movement types can be calculated, and the molecular structure changes of the natural vulcanizates characterized by terahertz dielectric spectrum were analyzed. Due to the similarity of the aging of the material, the results can also play a positive role in studying other polymer materials aging.

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