Mechanical Testing of Recycled HDPE Extruded Hollow Section
High density polyethylene (HDPE) is a thermoplastic polymer which is classified as one of the highly consumed types of plastics. One major advantage of thermoplastic materials is their ability of recycling and reprocessing which will bring considerable economic and environmental benefits. The present paper, therefore, endeavors to explore the practical possibility of using recycled HDPE hollow section as a replacement of virgin HDPE made by the extrusion process. The main focus of the study was to evaluate the mechanical performance of the recycled HDPE and compare the results with virgin or non-recycled HDPE. The modulus of elasticity, tensile yield and ultimate strength, compressive yield and ultimate strength, flexural yield and ultimate strength and the coefficient of thermal expansion were the main parameters to be checked against the respective mechanical properties. Thus, pursuant to the results, it was found out that the modulus of elasticity and the tensile yield strength are lower in recycled HDPE compared to the non-recycled HDPE. However, there is no significant difference between the recycled and non-recycled HDPE for the tensile ultimate strength, compressive yield strength and compressive ultimate strength. The flexural yield strength and flexural ultimate strength properties of the recycled HDPE proved to be superior to those of the non-recycled HDPE. The coefficient of linear thermal expansion of the recycled HDPE sample was 130 μm/(m.°C) and that for the non-recycled HDPE was 142 μm/(m.°C).
Andersson, T., Stålbom, B., & Wesslén, B. (2004). Degradation of polyethylene during extru-sion. II. Degradation of low-density polyethylene, linear low-density polyethylene, and high-density polyethylene in film extrusion. Journal of Applied Polymer Science, 92(1), 684-685.
Araújo, J. R., Waldman, W. R., & De Paoli, M. A. (2008). Thermal properties of high density polyethylene composites with natural fibres: Coupling agent effect. Polymer Degradation and Stability, 93(10), 1770-1775.
Bamberger Polymers. (2019). Overview of materials for High Density Polyethylene (HDPE), Injection Molded. Retrieved September 3, 2020, from Matweb.com website: link
Barraclough, S. (2011). Recycling materials. London: Franklin Watts.
Goodship, V. (2007). Introduction to plastics recycling. Shawbury: Smithers Rapra Technology.
Harper, C. A. (2000). Modern plastics handbook. New York: Mcgraw-Hill.
Harper, C. A. (2002). Handbook of plastics, elastomers, and composites. New York: Mcgraw-Hill.
Hearn, E. J. (2008). Mechanics of materials : an introduction to the mechanic of elastic and plas-tic deformation of solids and structural components. New Dehli: Elsevier.
Hsueh, H.-C., Kim, J. H., Orski, S., Fairbrother, A., Jacobs, D., Perry, L., … Sung, L. (2020). Micro and macroscopic mechanical behaviors of high-density polyethylene under UV ir-radiation and temperature. Polymer Degradation and Stability, 174(2), 109098.
Kolařík, J., Pegoretti, A., Fambri, L., & Penati, A. (2006). High-density polyethylene/cycloolefin copolymer blends, part 2: Nonlinear tensile creep. Polymer Engineering & Science, 46(10), 1363-1373.
McKelvey, D., Menary, G. H., Martin, P. J., & Yan, S. (2017). Large strain, high rate semi-solid deformation of high density polyethylene at elevated temperatures. Polymer Engineering & Science, 58(9), 1516-1522.
Mustafayeva, F. A. (2020). Effect of aluminum hydroxide concentration on properties and crys-tallization regularities of composite materials based on high and low density polyethylene mixtures. Chemical Problems, 18(1), 33-39.
Pawlak, A. (2007). Cavitation during tensile deformation of high-density polyethylene. Polymer, 48(5), 1397-1409.
Qian, C., Mansfield, C. D., & Baird, D. G. (2017). Extrusion Blow Molding of Polymeric Blends Based on Thermotropic Liquid Crystalline Polymer and High Density Polyethylene. In-ternational Polymer Processing, 32(1), 112-120.
Rudolph, N. S., Kiesel, R., & Chuanchom Aumanate. (2017). Understanding plastics recycling : economic, ecological, and technical aspects of plastic waste handling. Munich: Hanser Publishers ; Cincinnati.
Total number of hits on abstract = 66 times
Downloads for 2021
This work is licensed under a Creative Commons Attribution 4.0 International License.