Iranian Journal of Polymer Science and Technology

Iranian Journal of Polymer Science and Technology

The Molecular Structure of SBR and Filler Type Effects on Thermal Diffusivity of SBR/BR Compounds Used in Tire Tread

Document Type : Research Paper

Authors
Mir Hamid Reza Ghoreishy
Foroud Abbassi-Sourki
Department of Rubber Processing and Engineering, Faculty of Processing, Iran Polymer and Petrochemical Institute, P.O. Box: 14975-112, Tehran, Iran
10.22063/jipst.2017.1483
Abstract
This research work is devoted to the study of the thermal diffusivity of SBR/BR compounds used as the tread of radial tires. Three series of rubber compounds were prepared, in which two solution SBR grades (with and without extra oil) as well as an emulsion SBR were selected. Five compounds with different CB/silica ratios were designed for each of the three series. Moreover, three compounds without fillers were prepared as reference samples. Thermal diffusivities of the compounds were determined by a novel technique to solve an inverse heat transfer problem. Abaqus and Isight codes were used to carry out the finite element solution and optimization. It is shown that, in all the compounds the thermal diffusivities were reduced with increasing the temperature. In addition, the macro- and micro- structures of SBR as well as the CB/silica ratios greatly affected the variations in thermal diffusivities with temperature. The thermal diffusivity and its variabilities were studied and discussed by different structural and functional parameters such as intermolecular distance, molecular vibrational energy, difference between the thermal diffusivities of the polymer and filler, and the chemical bonds between the polymer and silica.
  1. Frumkin L. and Dubinker Y., Investigation of the Thermal Conductivity of Rubber, Rubber Chem. Technol., 11, 359-371, 1938.
  2. Rehner J., Heat Conduction and Molecular Structure in Rubberlike Polymers, Rubber Chem. Technol., 21, 82-93, 1948.
  3. Eiermann K., Model Interpretation of Thermal Conductivity in High Polymers I. Amorphous High Polymer, Rubber Chem. Technol., 39, 841-857, 1966.
  4. Hands, D., The Thermal Transport Properties of Polymer, Rubber Chem. Technol., 50, 480-522, 1977.
  5. Hands D. and Horsfall F., Thermal Diffusivity and Conductivity of Natural Rubber Compounds, Rubber Chem. Technol., 50, 253-265, 1977.
  6. Kong D., White J.L., Weissert F.C., and Nakajima N., An Experimental and TheoreticalStudy of Heat Conduction and Vulcanization of Rubber Compounds in Molds, Rubber Chem. Technol., 60, 140-158,  1987.
  7. Saxena N.S., Pradeep P., Mathew G., Thomas S., Gustafsson M, and Gustafsson S.E., Thermal Conductivity of Styrene Butadiene Rubber Compounds with Natural Rubber Prophylactics Waste as Filler, Eur. Polym. J., 35, 1687-1693, 1999.
  8. Ghoreishy M.H.R. and Naderi G., A New Method for Determination of the Thermal Conductivity of Rubber Compounds, Iran. Polym. J., 10, 315-320, 2001.
  9. Ghoreishy M.H.R., Numerical Simulation of the Curing Process of Rubber Articles, in Computational Materials, Oster W.U. (Ed.), Nova Science, New York,  445-478, 2009.
  10. Ghoreishy M.H.R., A State-of-the-Art Review on the Mathematical Modeling and Computer Simulationof Rubber Vulcanization Process, Iran. Polym. J., 25, 89-109, 2016.
  11. Ghoreishy M.H.R., Introduction to the Finite Element Method in Chemical and Polymer Engineering, Iran Polymer and Petrochemical Institute, Tehran, Iran, Chapt. 3, 2013.
  12. Abaqus FEA., Dassault Systemes, Simulia, 2014.
  13. Andrew R. Conn., Scheinberg K., and Vicente L.N., Introduction To Derivative-Free Optimization, Society for Industrial and Applied Mathematics and Mathematical Programming, Philadelphia,  USA, 2009.
  14. Isight, Dassault Systemes, Simulia, 2015.
  15. Daniels C.A., Polymers: Structure and Properties, CRC, USA, Chapt. 3, 29-30, 1989.
  16. Green D. and Perry R., Perry’s Chemical Engineers’ Handbook, 8th ed., McGraw-Hill Education, USA, Chapt. 2, 2007.
  17. Lin C.J., Hergenrother W.L., Alexanian E., and Böhm G.G.A., On the Filler Flocculation in Silica-Filled Rubbers Part I. Quantifying and Tracking the Filler Flocculation and Polymer-Filler Interactions in the Unvulcanized Rubber Compounds, Rubber Chem. Technol.,75, 864-889, 2002.
  18. Bejan, A., Convection Heat Transfer, 3rd ed., John Wiley and Sons, New York, Appendix C, 2004.

 

 

Iranian Journal of Polymer Science and Technology
Volume 30, Issue 2 - Serial Number 148
May and June 2017
Pages 139-149