JMMCE  Vol.11 No.7 , July 2012
Mechanical Properties of Iron Ore Tailings Filled-Polypropylene Composites
ABSTRACT
Iron ore tailings filled polypropylene (PP) composites were produced using the compo-indirect squeeze casting (C-ISC) process. Particle sizes 150, 212 and 300 μm where considered for different volume fractions of 5% to 30% at intervals of 5%. The tensile and impact behavior of the produced composites were investigated, experimentally, by carrying out uniaxial tensile and izod impact tests to obtain tensile strength, elongation at break, modulus of elasticity and impact strength. Empirical data were compared with results obtained from models proposed by Nielsen, Bigg and Einstein. The experimental results show that elongation at break for iron ore tailings filled PP reduces with increasing 150 μm particle size. Tensile strength reduces with increasing filler. The Bigg equation exhibited improved predictability with decreasing particle size of filler in PP; while the Einstein equation which assumes poor adhesion gives the best prediction of modulus of elasticity with increasing particle size in PP. Izod impact strength decreases with particle size but increases with increasing volume content of iron ore tailings from 5% to 25% for each particle size considered.

Cite this paper
S. Adedayo and M. Onitiri, "Mechanical Properties of Iron Ore Tailings Filled-Polypropylene Composites," Journal of Minerals and Materials Characterization and Engineering, Vol. 11 No. 7, 2012, pp. 671-678. doi: 10.4236/jmmce.2012.117051.
References
[1]   Love, B. M., 2004, Multiscale Analysis of Failure in Heterogeneous Solids under Dynamic Loading; PhD Thesis, Virginia Polytechnic Institute and State University.

[2]   Van Dommelen, J. A. W., Brekelmans, W. A. M. and Baaijens, F. P. T., 2003, “A numerical investigation of the potential of rubber and mineral particles for toughening of semicrystalline polymers.” Computational Materials science, Vol. 27, pp. 480-492.

[3]   Ravichandran, G. and Liu, C. T., 1995, “Modeling Constitutive Behavior of Particulate Composites Undergoing Damage.” International J. of Solids and Structures, Vol. 32 No. 6/7, pp. 979-990.

[4]   Kwon, Y. W., Lee, J. H. and Liu, C. T., 1998, “Study of Damage and Crack in Particulate Composites.” Composites Part B: Engineering, Vol. 29, No. 4, pp. 443-450.

[5]   Maiti, S. N.; Mahapatro, P. K., 2011, “Mechanical properties of i-PP/CaCO3.” J. of Applied Polymer Science, Vol. 42, Issue 12, pp. 3077-3273.

[6]   Maiti, S. N.; Mahapatro, P. K., 1992, “Mechanical properties of nickel-powder-filled polypropylene composites.” Polymer Composites, Vol. 13, Issue 1, pp. 47-52.

[7]   Tavman, I. H., 1996, “Thermal and mechanical properties of aluminum powder-filled high-density polyethylene composites.” J. of Applied Polymer Science, Vol. 62, pp. 2161-2167.

[8]   McCarthy, M. A. and Wiggeraad, J. F. M., 2001, “Numerical investigation of a crash test of a composite helicopter subfloor structure.” Composite Structures, Vol. 51, pp. 345-359.

[9]   Nie, S., 2005, A Micromechanical Study of the Damage Mechanics of Acrylic Particulate Composites under Thermomechanical Loading. PhD Thesis. The State University of New York at Buffalo.

[10]   Nielsen, L. E., 1996, (Simple theory of stress-strain properties of filled polymers.” J. of Applied Polymer Science, Vol. 10, pp. 97-103.

[11]   Bigg, D. M., 1979, “Mechanical, thermal, and electrical properties of metal fiber-filled polymer composites.” Polymer Engineering & Science, Vol. 19, pp. 1188-1192.

[12]   Einstein, A. Annalen der Physik, 1905, “On the movement of small particles suspended in stationary liquids required by the molecular-kinetic theory of heat.” Vol.17, pp. 549-560.

[13]   ASTM E 171, ASTM International.

[14]   ASTM E 41, ASTM International.

[15]   Adepoju, S. O. and Olaleye, B. M., 2001, “Gravity concentration of silica sand from Itakpe ironore tailings by tabling operation.” Nigerian J. of Engineering Management, Vol. 2, No. 2, p. 51-55.

[16]   Olubambi, P. A. and Potgieter, J. H., 2005, “Effectiveness of gravity concentration for the beneficiation of Itakpe (Nigeria) iron ore achieved through jigging operation.” J. of Mineral & Materials Characterization & Engineering, Vol. 4, No. 1, p. 21-30.

[17]   Vernon, J. (1992) Testing of Materials, Macmillan, London.

[18]   Wang, J., 2003, High-Temperature Deformation of Al2O3/Y-TZP Particle Composites and Particulate Laminates. PhD Thesis. The University of Texas at Austin.

[19]   ASTM D 638, ASTM International.

[20]   ASTM D 618, ASTM International.

[21]   ASTM D 256, ASTM International.

 
 
Top