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An Investigation on the Effect of Carbon Nanotubes on Physical and Mechanical Properties of Elastomers

Saatchi, Mohammad Mahdi | 2011

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 41666 (06)
  4. University: Sharif University of Technology
  5. Department: Chemical and Petroleum Engineering
  6. Advisor(s): Shojaei, Akbar
  7. Abstract:
  8. Nanostructure matrials have reached a special place to be used in wide applications in recent decades. Among those carbon nanotubes have got much attention due to their excellent mechanical and electrical properties and their ability of developing new nanocomposites, though the issues of perfect dispersion and interaction with polymeric matrix hinders their development. In this work, recent advances on carbon nanotubes (CNTs) and rubbers nanocomposites have been reviewed and the intrinsic potential of carbon nanotubes as reinforcing filler in elastomeric materials has been demonstrated. In experimental section in addition to CNTs, two different grades of CBs, i.e. N330 and super conductive CB (SCCB), was used in fabricating three sets of SBR compounds based on mechanical mixingfor analyzingreinforcingproperties of CNTs. Characterizing was carried out by applyingscaning electron microscopy (SEM) micrographs, cure rheometric tests, swelling and mechanical tests. SEM micrographs showed acceptable dispersion of nanofillers and emphased existence of percolation thershold for SCCB filled specimens. Curing curves showed by increasing the filler content, will cause a growth in low and high moman and difference of them, and a reduction in scorch time and curing time which these changes was more significant for SCCB/SBR. The reason of these events according to last proposed mechanisms was related to adhered occluded and bound rubber to fillers. Furthermore some of theoretical modeling such as hydrodynamics, micromechanicals and elastics models has been used to predict the experimental data. Using theoretical backgrounds of the models, some mechanisms have been proposed for describing nanocaomposites behavior in mechanical tests.

  9. Keywords:
  10. Carbon Nanotubes ; Nanocomposite ; Styrene Butadiene Latex (SBR) ; Superconductive Carbon Black ; N330 Carbon Black ; Reinforcing Properties

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