Solid State Science and Technology, Vol. 17, No 1 (2009) 37-43
EFFECT OF ULTRASONIC TREATMENT ON THE TENSILE PROPERTIES OF THERMOPLASTIC NATURAL RUBBER (TPNR) NANOCOMPOSITES
Mou'ad.A.Tarawneh1, Sahrim Hj. Ahmad1, Rozaidi Rasid1 and S.Y.Yahya2
1Material Science Programme, School of Applied Physics, Faculty of Science and Technology, Universiti Kebangsaan Malaysia, 43600 Bangi Selangor, Malaysia
2 Institutes of Sciences, Universiti Teknologi Mara,
40450 Shah Alam, Selangor, Malaysia
This paper discussed the effect of ultrasonic treatment time on the tensile properties of TPNR nanocomposites. Melt compounding technique was employed to prepare thermoplastic natural rubber (TPNR) nanocomposite. The ultrasonic bath was used to improve the filler-matrix interfacial adhesion. TPNR nanocomposites were prepared in the ratio of (70:20:10) from polypropylene (PP), natural rubber (NR) and liquid natural rubber (LNR) as a compatibilizer, with 4% organophilic montmorillonite (MMT). The composites samples were prepared using in-situ method at the optimum processing parameter of 180oC with 100 rpm mixing speed and 13 minutes processing time. The clay layers were found to be separated further with ultrasonic treatment as compared to the sample without ultrasonic treatment as exhibited by X-ray diffraction. Young's modulus, tensile strength and elongation at break of TPNR nanocomposites increased with ultrasonic treatment. The optimum result was achieved at 3h, the enhancement of these properties confirms by the fact that ultrasonic treatment can promote the dispersion of the clay in TPNR also it improves the compatibility of clay filler and the TPNR matrix.
. Y. Ke, C. Long, Z. Qi. (1999). Crystallization, properties, and crystal and nanoscale morphology of PET-clay nanocomposites. J. Appl. Polym. Sci. 71, 1139 1146.
. M. Song, D.J. Hourston, K.J. Yao, J.K.H. Tay, M.A. Ansarifar. (2003). High performance nanocomposites of polyurethane elastomer and organically modified layered silicate, J. Appl. Polym. Sci. 90, 3239 3243.
. Y. Kojima, A. Usuki, M. Kawasumi, A. Okada, Y. Fukushima, T. Karauchi, O. Kamigaito. (1993). Mechanical properties of nylon-6±clay hybrid, J. Mater. Res. 6 , 1185±1189.
. Avella, M., Cosco, S., Di Lorenzo, M.L., Di Pace, E., Errico, M.E. and Gentile, G. (2006). Nucleation Activity of Nanosized CaCO3 on Crystallization of Isotatic Polypropylene, in Dependence on Crystal Modification, Particle Shape and Coating. European Polymer Journal, 42, 15481557.
. Lijuan Zhao, Jiang Li, Shaoyun Guo, Qin Du .(2006). Ultrasonic oscillations induced morphology and property development of polypropylene/montmorillonite nanocomposites. Polymer, 47, 24602469.
. K. N. Madhusoodanan, Siby Varghese. (2006). Technological and Processing Properties of Natural Rubber Layered Silicate-Nanocomposites by Melt Intercalation Process. J. Appl. Polym. Sci. 102, 25372543.