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Polyisoprene-coated Silica/Natural Rubber Composite

Authors: Chatwarin Poochai, Puttichai Pae-on, Thirawudh Pongpayoon

Abstract:

The commercial white tyres are usually used for forklifts in food and medicine industries. Conventionally, silica is used as reinforcement in the tyres. However, the adhesion between silica particles and rubber is remarkably poor. To improve the problem of adhesion and hence enhance wear resistance, modification of silica surface is one of the solutions. In this work, the natural rubber compound blending with polyisoprene-coated silica prepared by admicellar polymerization technique was studied to compare with the natural rubber compound of unmodified silica. The surface characterization of modified silica was also examined by SEM, FTIR, and TGA. The results show that polyisoprene-coated silica/natural rubber compound gave better overall mechanical properties, especially wear resistance with the improvement of the adhesion between silica and natural rubber matrix that can be seen in the SEM micrograph.

Keywords: White tyre, admicellar polymerization, modified silica, wear resistance.

Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1085161

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References:


[1] Ansarifar A., Azhar A., Ibrahim N., Shiah S.F., and Lawton J.M.D, "The use of a silanised silica filler to reinforce and crosslink natural rubber," International Journal of Adhesion & Adhesives 25 (2005) 77-86.
[2] POH B.T. and NG C.C. Effect of silane coupling agents on the mooney scorch time of silica-filled natural rubber compound. Eur. Polym. J. Vol.34, 7, pp. 975-979,1998.
[3] Urushihara Y., Li L., Matsui J., and Nishino T. In situ observation of filler displacement during tensile deformation of nanosilica-filled natural rubber using field-emission scanning electron microscope. Composites: Part A 40 (2009) 232-234.
[4] Nontasorn P., Chavadej S., Rangsunvigit P., O-Havior J.H., Chaisirimahamorakot S., and Na-Ranong N. Admicellar polymerization modified silica via a continuous stirred-tank reactor system: Comparative properties of rubber compounding. Chemical Engineering Journal 108 (2005) 213-218.
[5] Yooprasert M., Pongprayoon T., Suwanmala P. Hemvichian K. and Tumcharern G. Radiation-induced admicellar polymerization of isoprene on silica: Effects of surfactant-s chian length. Chemical Engineering Journal 156 (2010) 193-199.
[6] Rattanasom N., Prasertsri S., and Ruangritnumchai T. Comparison of the mechanical properties at similar natural rubber filled with various reinforce-fillers. Polymer Testing 28 (2009) 8-12.
[7] Sae-oui P., Sirisinha C., Thepsuwan U., and Hatthapanit K. " Comparison of reinforcing efficiency between Si-69 and Si-264 in a conventional vulcanization system" Polymer Testing 23 (2004) 871-879.
[8] Rattanasom N. Saowapark T., and Deeprasertkul C. Reinforcement of natural rubber with silica/carbon black hybrid filler. Polymer Testing 26 (2007) 369-377.