Effects of Cure Temperature on the Mechanical Properties of Coconut Shell and Snail Shell Particles Reinforced Polyester Matrix Composites

Year 2020, Volume: 4 Issue: 5, 9 - 17, 28.12.2020

Babatunde Bolasodun , Stephen Durowaye , Olubukola Rufai Ganiyu Lawal

Abstract

The effect of cure temperature on the mechanical properties and glass transition temperature of snail shell and coconut shell particles reinforced polyester matrix composites was investigated in this study. The purpose of the study was to determine if cure temperature has an effect on the mechanical properties of these polyester composites Two batches of polymer composites with snail shell and coconut shell particles reinforcements of varied proportions from 5 – 25 wt. % were prepared by casting method. One batch of samples was cured at room temperature while the other batch was heated to 150⁰ C and held for four hours. All the samples were subjected to tensile, impact, flexural, hardness and glass transition tests. Mechanical tests revealed that the samples cured at 150⁰ C exhibited better mechanical properties than the samples cured at room temperature. This could be as a result of better crosslinking within the post cured polyester composites. The micrographs revealed a fairly even dispersion of the reinforcements within the matrix which contributed to the enhancement of the mechanical properties of the composites. The coconut shell and snail shell particles reinforced polyester composites at 20 wt. % and 10 wt. % reinforcements exhibited the highest resistance to elongation with values of 230.01 MPa and 193.64 MPa respectively. The snail shell particles reinforced composite and the coconut shell particles reinforced composite exhibited the highest impact energy of 5.87 J and 5.40 J respectively at 15 wt. % reinforcement. The snail shell and coconut shell particles reinforced composites exhibited high hardness of 143.26 BHN and 130.53 BHN respectively. The improved properties exhibited by these composites are an indication of their suitability for engineering applications.

Keywords

Polyester composite, coconut shell, snail shell, cure temperature

References

• [1] Laly, A., Pothan, S., Thomas, N.R. and Neelakantan, (1997). Short banana fiber reinforced polyester composites: mechanical, failure and aging Characteristics. Journal of Reinforced Plastics and Composites, 16(8):744-765. [2] Raghad U.A (2015). Mechanical behavior of natural material (Orange peel) reinforced polyester composite. International Journal of Engineering Sciences & Research Technology, 4(3):166-172
• [3] Nwigbo S.C., Okafor, T.C and Atuanya, C.U (2013). Mechanical properties of castor seed shell-polyester matrix composites, Research Journal of Applied Sciences, Engineering and Technology 5(11): 3159-3164.
• [4] Durowaye, S.I., Lawal, G.I., Akande, M.A. and Durowaye V.O. (2014). Mechanical properties of particulate coconut shell and palm fruit polyester composites. International Journal of Materials Engineering, 4(4): 141-147. [5] Meenambika, G.B. and Raghavendra, R.H. (2014). Mechanical and chemical properties of bamboo/glass fibers reinforced polyester hybrid composite. Industrial Engineering Letters, 4(4):39-42.
• [6] Barcelos, M.A., Simonassi, N.T., Monteiro, S.N. and Margem, F.M. (2014). Impact tests in polyester matrix composites reinforced with continuous curaua fiber, Congresso Brasileiro de Engenharia e Ciência dos Materials (CBECIMAT), Cuiabá, MT, Brasil.3580-3588.
• [7] Mechtali, F.Z., Essabir, H., Nekhlaoui, S. and Bensalah, M.O (2015). Mechanical and thermal properties of polypropylene reinforced with almond shells particles. Impact of Chemical Treatments. Journal of Bionic Engineering, 12:483-494.
• [8] Rufai, O.I., Lawal, G.I., Bolasodun, B.O., Durowaye, S.I. and Etoh, J.O. (2015). Effect of cow bone and groundnut shell reinforced in epoxy resin on the mechanical properties and microstructure of the composites. World Academy of Science, Engineering and Technology (WASET), International Journal of Chemical, Molecular, Nuclear, Materials and Metallurgical Engineering, 9:353-359.
• [9] Raghad, U.A., Falak, U.A. and Mohamed, O.A. (2015). Improvement of mechanical properties of polyester composite reinforced by bio filler (Acro Shell). International Journal of Innovative Science, Engineering & Technology, 2(3):35-38
• [10] Durowaye, S.I., Sekunowo, O.I., Lawal, G.I., Shittu, S. and Duru, P. (2018). Effects of silicon carbide, millscale, and magnesia particulates on the mechanical properties of hybrid unsaturated polyester resin matrix composites. Usak University Journal of Engineering Sciences (UUJES), 1(1): 28-37.
• [11] Monteiro, S.N., Terrones, L.A. and d’Almeida, J.R. (2005). Mechanical strength of polyester matrix composites reinforced with coconut fiber wastes. Revista Matéria, 10(4): 571 – 576.
• [12] Rafah A. N. (2015). Preparation and characterization of eggshell powder (ESP) and study of its effect on unsaturated polyester composites material. Iraqi Journal of Applied Physics, 11(1): 25-28.