JMMCE  Vol.2 No.4 , July 2014
Characterization of LDPE Reinforced with Calcium Carbonate—Fly Ash Hybrid Filler
The synergetic effect of calcium carbonate (CC)-fly ash (FA) hybrid filler particles on the mechanical and physical properties of low density polyethylene (LDPE) has been investigated. Low density polyethylene is filled with varying weight percentages of FA and CC using melt casting. Composites are characterized for mechanical, thermal, microstructural and physical properties. Results show that the flexural strength increases with increases in FA content of the hybrid filler. It is evident from the study that to achieve optimum density a certain combination of both fillers need to be used. The optimum combination of CC and FA for a higher density (1.78 g/cm3) is found to be at 20 wt% FA and 30 wt% CC. An increase of 7.27% in micro-hardness over virgin polyethylene is obtained in composites with 10 wt% FA and 40 wt% CC. The presence of higher amount of CC is seen to be detrimental to the crystallinity of composites. X-ray, FTIR and DSC results show that composite with 45 wt% CC and 5 wt% FA exhibits a typical triclinic polyethylene structure indicating that the composite is amorphous in nature. There was the synergy between FA and CC fillers on flexural strength and crystallinity of composite. However, the fillers show the antagonistic effect on energy at peak and micro-hardness.

Cite this paper
Adeosun, S. , Usman, M. , Akpan, E. and Dibie, W. (2014) Characterization of LDPE Reinforced with Calcium Carbonate—Fly Ash Hybrid Filler. Journal of Minerals and Materials Characterization and Engineering, 2, 334-345. doi: 10.4236/jmmce.2014.24038.
[1]   Hemati, F. and Garmabi, H. (2011) Compatibilised LDPE/LLDPE/Nanoclay Nanocomposites: I. Structural, Mechanical, and Thermal Properties. Canadian Journal of Chemical Engineering, 89, 187-196.

[2]   Velado, D., Potgieter, H. and Liauw, C.M. (2013) Investigation into the Adsorption of a Commercial Coupling Agent for Polymers onto Pretreated Fly Ash Filler Particles. Journal of Applied Polymer Science, 130, 3985-3992.

[3]   Gummadi, J.G., Kumar, V. and Rajesh, G. (2012) Evaluation of Flexural Properties of Fly Ash Filled Poly-Propylene Composites. International Journal of Modern Engineering Research, 2, 2584-2590.

[4]   Ohimain, E.I. (2013) A Review of the Nigerian Biofuel Policy and Incentives (2007). Renewable and Sustainable Energy Reviews, 22, 246-256.

[5]   Knox, E.G. (2008) Atmospheric Pollutants and Mortalities in English Local Authority Areas. Journal of Epidemiology and Community Health, 62, 442-447.

[6]   Brown, P., Jones, T. and BéruBé, K. (2011) The Internal Microstructure and Fibrous Mineralogy of Fly-Ash from Coal-Burning Power Stations. Environmental Pollution, 159, 3324-3333.

[7]   Xu, L.L., Guo, W., Wang, T. and Yang, N.R. (2005) Study on Fired Bricks with Replacing Clay by Fly Ash in High Volume Ratio. Construction and Building Materials, 19, 243-247.

[8]   Lav, A.H., Lav, M.A. and Goktepe, A.B. (2006) Analysis and Design of a Stabilized Fly Ash as Pavement Base Material. Fuel, 85, 2359-2370.

[9]   Hong, J.K., Jo, H.Y. and Yun, S.T. (2009) Coal Fly Ash and Synthetic Coal Fly Ash Aggregates as Reactive Media to Remove Zinc from Aqueous Solutions. Journal of Hazardous Materials, 164, 235-246.

[10]   Ojha, K., Pradhan, N.C. and Samanta, A.N. (2004) Zeolite from Fly Ash: Synthesis and Characterization. Bulletin of Material Science, 27, 555-564.

[11]   Matlob, A., Kamarudin, R.A., Jubri, Z. and Ramli, Z. (2011) Response Surface Methodology for a Green Synthesis of Zeolite Na-A. European Journal of Scientific Research, 60, 540-550.

[12]   Babajide, O., Petrik, L., Musyoka, N., Amigun, B. and Ameer, F. (2010) Use of Coal Fly Ash as a Catalyst in the Production of Biodiesel. Petroleum & Coal, 52, 261-272.

[13]   Babajide, O., Musyoka, N., Petrik, L. and Ameer, F. (2012) Novel Zeolite Na-X Synthesized from Coal Fly Ash as a Heterogeneous Catalyst in Biodiesel Production. Catalysis Today, 190, 54-60.

[14]   Garde, K., McGill, W.J. and Woolard, C.D. (1999) Surface Modification of Fly Ash—Characterization and Evaluation as Reinforcing Filler in Polyisoprene. Plastics, Rubber and Composites, 28, 1-10.

[15]   Usman, M.A., Adeosun, S.O. and Osifeso, G.O. (2012) Optimum Calcium Carbonate Filler Concentration for Flexible Polyurethane Foam Composite. Journal of Minerals & Materials Characterization & Engineering, 11, 311-320.

[16]   Adeosun, S.O., Usman, M.A., Ayoola, W.A. and Bodude, M.A. (2013) Physico-Mechanical Responses of Polypropylene—Calcium Carbonate Composite. Journal of Minerals and Materials Characterization and Engineering, 1, 145-152.

[17]   Leong, Y.W., Abu Bakar, M.B., Mohd Ishak, Z.A., Ariffin, A. and Pukanszky, B. (2004) Comparison of the Mechanical Properties and Interfacial Interactions between Talc, Kaolin, and Calcium Carbonate Filled Polypropylene Composites. Journal of Applied Polymer Science, 91, 3315-3326.

[18]   Zuiderduin, W.C.J., Westzaan, C., Huetink, J. and Gaymans, R.J. (2003) Toughening of Polypropylene with Calcium Carbonate Particles. Polymer, 44, 261-275.

[19]   Lazzeri, A., Zebarjad, S.M., Pracella, M., Cavalier, K. and Rosa, R. (2005) Filler Toughening of Plastics. Part I—The Effect of Surface Interactions on Physico-Mechanical Properties and Rheological Behavior of Ultrafine CaCO3/HDPE Nanocomposites. Polymer, 46, 827-844.

[20]   Youssef, H.A., Ismail, M.R., Ali, M.A.M. and Zahran, A.H. (2009) Studies on Sugarcane Bagasse Fiber—Thermoplastics Composites. Journal of Elastomers and Plastics, 41, 245-262.

[21]   Esnaashari, C., Khorasani, S.N., Entezam, M. and Khalili, S. (2013) Mechanical and Water Absorption Properties of Sawdust—Low Density Polyethylene Nanocomposite. Journal of Applied Polymer Science, 127, 1295-1300.

[22]   Ning, N., Zhang, W., Yan, J., Xu, F., Wang, T., Su, H., Tang, C. and Fu, Q. (2013) Largely Enhanced Crystallization of Semi-Crystalline Polymer on the Surface of Glass Fiber by Using Graphene Oxide as a Modifier. Polymer, 54, 303-309.

[23]   Atikler, U., Basalp, D. and Tihminlioglu, F. (2006) Mechanical and Morphological Properties of Recycled High-Density Polyethylene, Filled with Calcium Carbonate and Fly Ash. Journal of Applied Polymer Science, 102, 4460-4467.

[24]   Ahmad, I. and Mahanwar, P.A. (2010) Mechanical Properties of Fly Ash Filled High Density Polyethylene. Journal of Minerals & Materials Characterization & Engineering, 9, 183-198.

[25]   Abdel-Salam, S.I., Metwally, M.S., Abdel-Hakim, A.A., El Begawy, S. and Elshafie, E.S. (2011) Effect of Mineral Fillers on Rice Straw Fiber/High Density Polyethylene Composites. Nature and Science, 9, 116-124.

[26]   Kord, B. (2011) Effect of Calcium Carbonate as a Mineral Filler on the Physical and Mechanical Properties of Wood Based Composites. World Applied Sciences Journal, 13, 129-132.

[27]   Sirin, K., Balcan, M. and Dogan, F. (2012) The Influence of Filler Component on Mechanical Properties and Thermal Analysis of PP-LDPE and PP-LDPE/DAP Ternary Composites. In: Dogan, F., Ed., Polypropylene, InTech.

[28]   Oksman, K. and Clemon, C. (1998) Mechanical Properties and Morphology of Impact Modified Polypropylene-Wood Flour Composites. Journal of Applied Polymer Science, 67, 1503-1513.<1503::AID-APP1>3.0.CO;2-H

[29]   Abbas-Abadi, M.S., Haghighi, M.N. and Yeganeh, H. (2012) Effect of the Melt Flow Index and Melt Flow Rate on the Thermal Degradation Kinetics of Commercial Polyolefins. Journal of Applied Polymer Science, 126, 1739-1745.

[30]   Cifrulak, S.D. (1970) High-Pressure Mid-Infrared Studies of Calcium Carbonate. American Mineralogist, 55, 815-824.

[31]   Gulmine, J.V., Janissek, P.R., Heise, H.M. and Akcelrud, L. (2002) Polyethylene Characterization by FTIR. Polymer Testing, 21, 557-563.

[32]   Rajandas, H., Parimannan, S., Sathasivam, K., Ravichandran, M. and Yin, L.S. (2012) A Novel FTIR-ATR Spectroscopy Based Technique for the Estimation of Low-Density Polyethylene Biodegradation. Polymer Testing, 31, 1094- 1099.

[33]   Valles-Lluch, A., Contat-Rodrigo, L. and Ribes-Greus, A. (2003) Differential Scanning Calorimetry Studies on High- and Low-Density Annealed and Irradiated Polyethylenes: Influence of Aging. Journal of Applied Polymer Science, 89, 3260-3271.

[34]   Hitachi High-Tech (1986) DSC Measurement of Polyethylene—The Correlation of Polyethylene Density and Melting. TA No. 26.

[35]   Poltimäe, T., Tarasova, E., Krumme, A., Roots, J. and Viikna, A. (2011) Thermal Analyses of Blends of Hyper Branched Linear Low-Density Polyethylene (LLDPE) with High-Density Polyethylene and LLDPE Prepared by Dissolving Method. Materials Science, 17, 254-259.

[36]   Richardson, M.J. (1972) Precision Differential Calorimetry and the Heat of Fusion of Polyethylene. Journal of Polymer Science Part C, 38, 251-259.