Effect of multi-walled carbon nanotube on mechanical and rheological properties of silane modified EPDM rubber

Document Type : Original research

Authors

1 Iran Polymer and Petrochemical Institute, P.O. Box:14185/458, Tehran, Iran

2 Departments of Chemical Engineering, Isfahan University of Technology, P.O.Box: 8415683111, Isfahan, Iran

Abstract

A novel mixing approach for achieving a good dispersion of multi-walled carbon nanotubes (MWCNTs) in ethylene- propylene diene monomer (EPDM) matrix has been investigated. In this approach EPDM was modified with vinyltrimethoxysilane (VTMS) during melt mixing. In addition the effect of MWCNT concentration on mechanical and rheological properties of modified EPDM has been studied. The formulated composites by this method exhibited significantly enhanced physical properties even at very low nanotube concentration. The grafting reaction was confirmed by Fourier transform infrared spectroscopy (FT-IR) peak at 1070 and 1250 cm-1according to Si-O and Si-C vibration. The state of dispersion of the fillers in the polymer matrix was evaluated through transmission electron microscopy (TEM) and scanning electron microscopy (SEM), In addition surface topology was studied with atomic force microscopy (AFM). The results showed that VTMS-grafted on the EPDM surface improved the dispersion of MWCNTs in the matrix. The rheological characteristics have been studied by rubber process analyzer (RPA). Some properties such as storage modulus (Ǵ) and complex viscosity (η^*) increased with increasing MWCNT content. It was found that at concentration of 2 wt.% MWCNT, the nanocomposites exhibited notably enhanced mechanical properties such as modulus and tensile strength.

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Main Subjects

References

  1. Ismail H, Pasbakhsh P, Fauzi MN, Bakar AA (2008) Morphological, thermal and tensile properties of halloysite nanotubes filled ethylene propylene diene monomer (EPDM) nanocomposites. Polym Test 27: 841-850
  2. Ismail H, Shaari SM (2010) Curing characteristics, tensile properties and morphology of palm ash/ halloysite nanotubes/ethylene-propylene-diene monomer (EPDM) hybrid composites. Polym Test 29: 872-878
  3. Ismail H, Ramly F, Othman N (2011) The effect of carbon black/multiwall carbon nanotube hybrid fillers on the properties of natural rubber nanocomposites. Polym Plast Tech Eng 50: 660-666
  4. Perez LD, Zuluaga MA, Kyu T, Mark JE, Lopez BL (2009) Preparation, characterization, and physical properties of multiwall carbon nanotube/elastomer composites. Polym Eng Sci 49: 866-874
  5. Tsuchiya K, Sakai A, Nagaoka T, Uchida K, Furukawa T, Yajima H (2011) High electrical performance of carbon nanotubes/rubber composites with low percolation threshold prepared with a rotation–revolution mixing technique. Comp Sci Tech 71: 1098-1104
  6. Shanmugharaj AM, Bae JH, Lee KY, Noh WH, Lee SH, Ryu SH (2007) Physical and chemical characteristics of multiwalled carbon nanotubes functionalized with aminosilane and its influence on the properties of natural rubber composites. Comp Sci Tech 67: 1813-1822
  7. Iijima S (1991) Helical microtubules of graphitic carbon. Nature 56: 354-358
  8. Eitan A, Jiang K, Dukes D, Andrews R, Schadler LS (2003) Surface modification of multiwalled carbon nanotubes: Toward the tailoring of the interface in polymer composites. Chem Mater 15: 3198-3201
  9. Sato Y, Hasegawa K, Nodasaka Y, Motomiya K, Namura M, Ito N, Jeyadevan B, Tohji K (2008) Reinforcement of rubber using radial singlewalled carbon nanotube soot and its shock dampening properties. Carbon 46: 1509-1512
  10. Kang I, Khaleque MA, Yoo Y, Yoon PJ, Kim SY, Lim KT (2011) Preparation and properties of ethylene propylene diene rubber/multi walled carbon nanotube composites for strain sensitive materials. Composites: Part A 42: 623-630
  11. Jiang MJ, Dang ZM, Yao SH, Bai J (2008) Effects of surface modification of carbon nanotubes on the microstructure and electrical properties of carbon nanotubes/rubber nanocomposites. Chem Phys Lett 457: 352-356
  12. Ma PC, Kim JK, Tang BZ (2006) Functionalization of carbon nanotubes using a silane coupling agent. Carbon 44: 3232-3238
  13. Verge P, Peeterbroeck S, Bonnaud L, Dubois P (2010) Investigation on the dispersion of carbon nanotubes in nitrile butadiene rubber: Role of polymer-to-filler grafting reaction. Comp Sci Tech 70: 1453-1459
  14. Hamza SS (1998) Effect of aging and carbon black on the mechanical properties of EPDM rubber. Polym Test 17: 131-137
  15. Das A, De D, Naskar N, Debnath SC (2006) Effect of vulcanization technique on the physical properties of silica-filled EPDM rubber. J Appl Polym Sci 99: 1132-1139
  16. Ma PC, Kim JK, Tang BZ (2007) Effects of silane functionalization on the properties of carbon nanotube/epoxy nanocomposites. Comp Sci Tech 67: 2965-2972
  17. Kumar C, Alagar M (2002) Development and characterization of vinyloxyaminosilane grafted ethylene-propylene-diene terpolymer (EPDM-g- VOS) for engineering applications. Eur Polym J 38: 2023-2031
  18. Desai AV, Haque MA (2005) Mechanics of the interface for carbon nanotube- polymer composites. Rev Thin Wall Struct 43: 1787-1803
  19. Kim YA, Hayashi T, Endo M, Gotoh Y, Wada N, Seiyama J (2006) Fabrication of aligned carbon nanotube-filled rubber composite. Scripta Mater 54: 31-35
  20. Lorenz H, Fritzsche J, Das A, Stockelhuber KW, Jurk R, Heinrich G, Kluppel M (2009) Advanced elastomer nano-composites based on CNT-hybrid filler systems. Comp Sci Tech 69: 2135-2143
  21. Ahmadi SJ, Huang Y, Li W (2005) Fabrication and physical properties of EPDM– organoclay nanocomposites. Comp Sci Tech 65: 1069-1076
  22. Lu L, Zhai H, Zhang Z, Ong C, Guo S (2008) Reinforcement of hydrogenated carboxylated nitrile–butadiene rubber by multi-walled carbon nanotubes. Appl Surf Sci 255: 2162-2166
  23. Colemam JN, Khan U, Blan WJ, Gun’ko YK (2006) Small but Strong: A review of the mechanical properties of carbon nanotubespolymer composites. Carbon 44: 1624-1652
  24. Lee SH, Cho EN, Jeon SH, Youn JR (2007) Rheological and electrical properties of polypropylene composites containing functionalized multi-walled carbon nanotubes and compatibilizers. Carbon 45: 2810-2822

 

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History

  • Receive Date: 17 July 2015
  • Revise Date: 29 September 2015
  • Accept Date: 01 November 2015

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