The Effect of Foaming on Mechanical and Morphological Properties of Polypropylene

Yıl 2022, Cilt: 11 Sayı: 3, 784 - 790, 30.09.2022

Yeşim Aslan Yeliz Albrechtsen Münir Taşdemir

https://doi.org/10.17798/bitlisfen.1097813

Cited By: 1

Öz

The automotive industry is among the priority technology areas of our country, and the reduction of vehicle weight and fuel consumption and thus CO2 emissions without compromising safety criteria are among the priority research areas. For this reason, R&D studies on increasing the use of polymer-based materials in the automotive industry are of great importance. In order to produce “high strength and weight reduction parts” in plastic moulding technologies, advanced technologies that focus on cost reduction and efficiency are being implemented rapidly. The chemical foaming process, which provides many advantages such as reducing the consumption of plastic material used, reducing the total moulding cycle time, using less tonnage injection moulding machines, and thus reducing the energy costs, is one of the innovative technologies that have been implemented since a very recent time. In this study, chemical foaming agent were being reinforced at the rate of 1-2-3% in natural fiber-reinforced recycled composite polypropylene raw material. The samples obtained in the injection machine was be moulded in the sizes and shapes in accordance with the standards. Tensile, hardness, impact and three points bending tests would be done. By examining the test results, the mechanical, and morphological properties of natural fiber reinforced polypropylene materials at different chemical agent percentages were examined. With increasing the amount of foaming agent, mechanical properties decreased.

Anahtar Kelimeler

Polypropylene, composites, chemical foam, plastic injection, mechanical properties.

Kaynakça

• [1] E. Bodros, C. Baley, “Study of the tensile properties of stinging nettle fibres”, Materials Letters, vol. 62(14), pp.2143-2145, 2008.
• [2] M.M. Alam, T. Ahmed, M.M. Haaque, M.A. Gafur, A.H. Kabir, “Mechanical properties of natural fiber containing polymer composites”, Polymer-Plastics Technology and Engineering, vol. 48(1), pp.110-113, 2009.
• [3] G. Sui, M.A. Fuqua, C.A. Ulven, W.H. Zhong, “A plant fiber reinforced polymer composite prepared by a twin-screw extruder”, Bioresource Technology, vol. 100(3), pp.1246-1251, 2009.
• [4] S.V. Joshi, L.T. Drzal, A.K. Mohanty, S. Arora, “Are natural fiber composites environmentally superior to glass fiber reinforced composites?”, Composites Part A: Applied science and manufacturing, vol.35(3), pp.371-376, 2004.
• [5] S. Ries, A. Spörrer, V. Altstädt, “Foam injection molding of thermoplastic elastomers: Blowing agents, foaming process and characterization of structural foams”, In AIP Conference Proceedings, American Institute of Physics, vol. 1593(1), pp. 401-410, 2014.
• [6] M.C. Guo, M.C. Heuzey, P.J. Carreau, “Cell structure and dynamic properties of injection molded polypropylene foams”, Polymer Engineering & Science, vol.47(7), pp. 1070-1081, 2007.
• [7] H. Wu, G. Zhao, G. Wang, W. Zhang, Y. Li, “A new core-back foam injection molding method with chemical blowing agents”, Materials & Design, vol. 144, pp. 331-342, 2018.
• [8] J.R. Ruiz, M. Vincent, J.F. Agassant, “Numerical modeling of bubble growth in microcellular polypropylene produced in a core-back injection process using chemical blowing agents”, International Polymer Processing, vol.31(1), pp. 26-36, 2016.
• [9] J.A. Reglero Ruiz, M. Vincent, J.F. Agassant, A. Claverie, S. Huck, “Morphological analysis of microcellular PP produced in a core‐back injection process using chemical blowing agents and gas counter pressure”, Polymer Engineering & Science, vol.55(11), pp. 2465-2473, 2015.
• [10] H. Wu, G. Zhao, J. Wang, G. Wang, W. Zhang, “Effects of process parameters on core-back foam injection molding process”, Express Polymer Letters, vol.13(4), pp. 390-405, 2019.
• [11] A.K. Bledzki, W. Zhang, O. Faruk, “Microfoaming of flax and wood fibre reinforced polypropylene composites”, Holz als Roh-und werkstoff, vol. 63(1), pp. 30-37, 2005.
• [12] A.K. Bledzki, O. Faruk, “Microcellular Wood–PP Composites in Extrusion, Injection and Compression Moulding Process”, Blowing Agents and Foaming Processes, vol. 20, pp. 1-10, 2005.
• [13] A.K. Bledzki, O. Faruk, “Microcellular wood fiber reinforced PP composites: Cell morphology, surface roughness, impact, and odor properties”, Journal of cellular plastics, vol. 41(6), pp. 539-550, 2005.
• [14] A.K. Bledzki, O. Faruk, “Microcellular wood fiber reinforced polypropylene composites: A comparative study between injection molding and extrusion process”, In ANTEC Society of Plastics Engineers Conference,vol. 2, pp. 2665-2669, 2004.
• [15] A.K. Bledzki, O. Faruk, “Microcellular Injection Molded Wood Fiber-PP Composites: Part II - Effect of Wood Fiber Length and Content on Cell Morphology and Physico-mechanical Properties”, Journal of Cellular Plastics, vol. 42(1), pp. 77–88, 2006.
• [16] S. Cakir, M. Aycicek, E. Altun, A. Akinci, “The effect of foaming agent on mechanical and physical properties of polypropylene”, Mater Sci: Adv Compos Mater, vol. 2, pp.1-7, 2018.