Advertisement

Journal of the Iranian Chemical Society

, Volume 8, Issue 4, pp 1063–1072 | Cite as

Study of morphology and thermal behavior of newly prepared plasticized sulfurs

  • N. Bahrami Adeh
  • T. Afghani
  • M. ShamsipurEmail author
Article

Abstract

The morphology of plasticized sulfur with styrene (STY) and dicyclopentadiene (DCPD) was studied using scanning electron microscopy, to investigate the influence of type of additive and time on the rate of conversion of β- to α-structure. The results revealed that major part of plasticized sulfur with STY converted to α-phase after 30 days. While the DCPD-plasticized sulfur mostly possessed a β-structure and only a minor part was converted to α-structure with the elapse of time. The thermal behavior of sulfur, molten sulfur, and the plasticized sulfur samples were studied by thermogravimetry (TG) and differential scanning calorimetry (DSC), 522 days after their preparation. The results clearly revealed that, among different samples studied, the DCPD-plasticized sulfur possesses the highest thermal stability. The effect of addition of micro- and nanosilica, as modifiers, on the morphology and thermal behavior of the STY-plasticized sulfur was also studied. It was found that the presence of the above fillers to the matrix of STY-plasticized sulfur not only caused the creation of some cracks in the sample, but also could not block the conversation of β- to α-structure.

Key words

Sulfur Plasticized sulfur Morphology Thermal stability β- to α-conversion 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. [1]
    R. Steudel (Ed.), Elemental Sulfur and Sulfur Rich Compounds, 230 Topics in Current Chemistry Series, Springer-Verlag, Berlin, 2003.Google Scholar
  2. [2]
    A.M.O. Mohamed, M.E.I. Gamal, Environ. Geol. 53 (2007) 159.Google Scholar
  3. [3]
    A.M.O. Mohamed, M.E. Gamal, Cement & Concrete Composites 31 (2009) 186.Google Scholar
  4. [4]
    L. Blight, B.R. Currell, B.J. Nash, R.A.M. Scott, C. Stillo, Preparation and Properties of Modified Sulfur Systems, New Uses of Sulfur- II, Advances in Chemistry Series 165, American Chemical Society, 1978, pp.13–30.Google Scholar
  5. [5]
    J.E. Paulson, M. Simic, R.W. Campbell, Sulfur Composites as Protective Coating and Construction Materials, New Uses of Sulfur-II, Advances in Chemistry Series 165, American Chemical Society, 1978, pp. 215–226.Google Scholar
  6. [6]
    R. Gannon Chares, R.H. Wombles, W.P. Hettinger, W.D Watkins, in: J.J. Emery (Ed.), New Concepts and Discoveries Related to the Strength Characteristics of Plasticized Sulfur, Properties of Flexible Pavement Materials, ASTM STP 807, 1983, pp. 84–101.Google Scholar
  7. [7]
    M.M. Vlahović, T.D. Boljanac, A.R. Branković, V.M. Vidojković, S.P. Martinović, N.G. Dordević, Hemijska Indust. 64 (2010) 129.Google Scholar
  8. [8]
    S. Milutin, C. Novato, Plasticized Sulfur Coating Compositions, U.S. Patent No. 4,233,082, 1980.Google Scholar
  9. [9]
    A.H. Vroom, Sulfur Cements, Process for Making of Sulfur Concretes, U.S. Patent No. 4,293,463, 1981.Google Scholar
  10. [10]
    A.C. Ludwig, J.M. Dale, Sulfur Compound and Method of Making Same, U.S. Patent No. 4,290,816, 1981.Google Scholar
  11. [11]
    M. Simic, Plasticized Sulfur Composition, U.S. Patent No. 4,348,233, 1982.Google Scholar
  12. [12]
    W.C. McBee, T.A. Sullivan, Structural Material, U.S. Patent No. 4,022,626, 1977.Google Scholar
  13. [13]
    M. Simic, Sulfur Composition, U.S. Patent No. 4,129,453, 1978.Google Scholar
  14. [14]
    R.D. Cassar, Plasticized Sulfur with Improved Stability, U.S. Patent No. 4,155,771, 1979.Google Scholar
  15. [15]
    R.D. Cassar, Sulfur Plasticization with Olefins, U.S. Patent No. 4,190,460, 1980.Google Scholar
  16. [16]
    Y.-H. Liu, T.-J. Wang, L. Qin, Y. Jin, Powder Technol. 183 (2008) 88.Google Scholar
  17. [17]
    A.M.O. Mohamed, Sulfur Harvesting: 2. Thermo-Mechanical Behavior of Newly Developed Sulfur Polymer Concrete, The Seventh Annual U.A.E. University Research Conference, 2004, pp. ENG 152–161.Google Scholar
  18. [18]
    S.L. Lin, J.S. Lai, E.S.K. Chian, Waste Manag. 15 (1995) 441.Google Scholar

Copyright information

© Iranian Chemical Society 2011

Authors and Affiliations

  1. 1.Department of ChemistryRazi UniversityKermanshahIran
  2. 2.Iranian R&D Center for Chemical Industries (ACECR)KarajIran

Personalised recommendations