Volume 4, Issue 2, June 2019, Pages: 34-42
Received: Sep. 27, 2019;
Accepted: Oct. 21, 2019;
Published: Oct. 25, 2019
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Ahmed Hassan Awad, Design and Production Department, Ain Shams University, Cairo, Egypt
Ramadan El Gamasy, Design and Production Department, Ain Shams University, Cairo, Egypt
Ayman Abd El Wahab, Design and Production Department, Ain Shams University, Cairo, Egypt
Mohamed Hazem Abdellatif, Design and Production Department, Ain Shams University, Cairo, Egypt
The properties of these polymers, as in the case of any materials, depending on the molecular weight of the polymer and the structure of the polymer chains. The main objective of this work is to study the mechanical and physical properties of pure PP and HDPE. To obtain a full characterization of pure polymer, samples were produced using a compression molding technique. Polymeric samples successfully filled the cavity of the die. The mechanical properties of PP and HDPE were determined using three-point bending, compression, hardness and impact test. While the physical properties were studied through density and water absorption. Also, the thermal analysis behavior was determined by thermogravimetric analysis, differential scanning calorimetry and thermomechnical analysis. Results showed the structure affects the properties. The PP showed better elastic modulus and strength due to the methyl attached to the carbon that prevents the chain rotation and hence makes the material stronger but inflexible. On the other hand, the absorbed energy of PP is less than that of HDPE. The thermogravimetric analysis results show a single weight-loss event with a degradation temperature of 310°C for HDPE and 255°C for PP. The differential scanning calorimetry shows that the crystallinity of PP (≅51) is less than that for HDPE (≅68) due to the difference in the specific heat. The coefficient of thermal expansion of HDPE is higher than that of PP due to the stronger interatomic forces.
Ahmed Hassan Awad,
Ramadan El Gamasy,
Ayman Abd El Wahab,
Mohamed Hazem Abdellatif,
Mechanical and Physical Properties of PP and HDPE, Engineering Science.
Vol. 4, No. 2,
2019, pp. 34-42.
Massaro, R., et al., Flow-Induced Crystallization of Polyamide-6. International Polymer Processing, 2018. 33 (3): p. 327-335.
Junior, C., WD Materials Science and Engineering an Introduction. 2000, EUA: John Wiley & Sons Inc.
Mittal, V., Spherical and fibrous filler composites. 2016: John Wiley & Sons.
AL-Oqla, F. M., Investigating the mechanical performance deterioration of Mediterranean cellulosic cypress and pine/polyethylene composites. Cellulose, 2017. 24 (6): p. 2523-2530.
Cohen, R. E., Handbook of plastics and elastomers, Charles A. Harper, Editor‐in‐Chief, 1024 pages, 525 Illustrations, McGraw‐Hill Book Company, $39.50. AIChE Journal, 1976. 22 (2): p. 413-413.
Paul, D., Concise encyclopedia of polymer science and engineering, Jacqueline I. Kroschwitz, John Wiley & Sons, New York, 1990. $135.00. Journal of Polymer Science B Polymer Physics, 1991. 29: p. 1653-1654.
Dowling, N. E., Mechanical behavior of materials: engineering methods for deformation, fracture, and fatigue. 2012: Pearson.
Awad, A. and M. H. Abdellatif, Assessment of mechanical and physical properties of LDPE reinforced with marble dust. Composites Part B: Engineering, 2019: p. 106948.
Watson, E., et al., A Differential Scanning Calorimeter for Quantitative Differential Thermal Analysis. Analytical Chemistry, 1964. 36 (7): p. 1233-1238.
Awad, A., et al., A study of some thermal and mechanical properties of HDPE blend with marble and granite dust. Ain Shams Engineering Journal, 2019. 10 (2): p. 353-358.
Peterlin, A., Macromolecular physics, vol. 2, Bernhard Wunderlich, Academic Press, New York, 1976, 461 pp. Journal of Polymer Science: Polymer Letters Edition, 1976. 14 (9): p. 571-571.
da Costa, H. M., V. D. Ramos, and M. G. de Oliveira, Degradation of polypropylene (PP) during multiple extrusions: Thermal analysis, mechanical properties and analysis of variance. Polymer Testing, 2007. 26 (5): p. 676-684.
Salih, S. E., A. F. Hamood, and A. H. A. Alsalam, Comparison of the characteristics of LDPE: PP and HDPE: PP polymer blends. Modern Applied Science, 2013. 7 (3): p. 33.
Mengeloglu, F. and K. Karakus, Thermal degradation, mechanical properties and morphology of wheat straw flour filled recycled thermoplastic composites. Sensors, 2008. 8 (1): p. 500-519.
Bagher, A. M. and B. M. Reza, Polymer Optic Technology. Optics, 2015. 4 (1): p. 1.
Awad, A., et al., Mechanical behavior of PP reinforced with marble dust. Construction and Building Materials, 2019. 228: p. 116766.
Awad, A., et al., The influence of adding marble and granite dust on the mechanical and physical properties of PP composites. Journal of Thermal Analysis and Calorimetry, 2019.