Investigation of Tribological Properties of Graphite Filled Cyclo-Olefin Copolymer (COC) Composites

Year 2021, Volume: 9 Issue: 3, 702 - 712, 01.09.2021

İbrahim Kılınç Salih Hakan Yetgin

https://doi.org/10.36306/konjes.910573

Abstract

In this study, 5%, 15%, 30%, 45%, 60%, and 75% graphite filled cyclo-olefin copolymer (COC) polymers have been produced by extrusion and pressure molding technics. Wear and friction tests have been carried out at the sliding speeds of 0.5 m/s, 1.0 m/s and 1.5 m/s, applied loads of 20 N, 30 N, 40 N and under dry conditions using pin-on-disc system. As a result of the experiments, coefficient of friction increases while wear rate decreases with increase both applied load and sliding speed. The lowest coefficient of friction and the wear ratio have been obtained in weight of 75% graphite filled COC composites. The coefficient of friction and wear rate of the 75% graphite filled COC polymer decreased by 87.7% and 498.79%, respectively.

Keywords

Wear, Graphite, Cyclo-Olefin Copolymer (COC), Friction

GRAFİT KATKILI SİKLO-OLEFİN KOPOLİMER (COC) KOMPOZİTLERİN TRİBOLOJİK ÖZELLİKLERİNİN İNCELENMESİ

Abstract

Bu çalışmada, ağırlıkça %5, %15, %30, %45, %60 ve %75 oranlarında grafit katkılı siklo-olefin kopolimer (COC) kompozitleri ekstrüzyon ve basınçlı kalıplama yöntemleri ile üretilmiştir. Sürtünme ve aşınma deneyleri, disk üzerinde pim sistemi (pim-disk) ile kuru ortam şartlarında, 20 N, 30 N ve 40 N yük ve 0.5 m/s, 1.0 m/s ve 1.5 m/s kayma hızında gerçekleştirilmiştir. COC polimeri ve grafit katkılı COC kompozitlerin artan kayma hızı ve yüke bağlı olarak sürtünme katsayısı azalmış aşınma oranı ise artmıştır. En düşük sürtünme katsayısı ve aşınma oranı %75 grafit katkılı COC kompozitinde elde edilmiştir. COC polimerine eklenen %75 oranındaki grafit katkısı ile sürtünme katsayısı %87.7 oranında, aşınma oranı ise %498.79 oranında azalmıştır.

Keywords

Aşınma, Grafit, Siklo-Olefin Kopolimer (COC), Sürtünme

References

• Akın, D., Alper, K., Ali, D., 2014, “Quantifying microstructure, electrical and mechanical properties of carbon fiber and expanded graphite filled cyclic olefin copolymer composites”, Composites: Part A, Cilt 60, ss. 44–51.
• Kasgoz, A., Dincer, A., Ali, D., 2012a, “Rheological and mechanical properties of cycloolefin copolymer/organoclay nanocomposites”, Journal of Reinforced Plastics and Composites, Cilt 31, Sayı 20, ss. 1329–1341.
• Kasgoz, A., Akın, D., Ali, D., 2012b, “Rheological Behavior of Cycloolefin Copolymer/Graphite Composites”, Polymer Engineering & Science, Cilt 52, Sayı 12, ss. 2645-2653.
• Kasgoz, A., Dincer, A., Ali, I. A., Ali, D., 2014a, “Effect of different types of carbon fillers on mechanical and rheological properties of cyclic olefin copolymer (COC) composites”, Composites: Part B, Cilt 66, ss. 126–135.
• Kasgoz, A., Akın, D., Ali, D., 2014b, “Rheological and electrical properties of carbon black and carbon fiber filled cyclic olefin copolymer composites”, Composites: Part B, Cilt 62, ss. 113–120.
• Lai, C. L., Ywu-Jang, F., Jung-Tsai, C., Da-Ming, W., Yi-Ming, S., Shu-Hsien, H., Wei-Song, H., Chien- Chieh, H., Kueir-Rarn, L., 2015, “Composite of cyclic olefin copolymer with low graphene content for transparent water-vapor barrier films”, Carbon, Cilt 90, ss. 85–93.
• Liu, C., Jian, Y., Xinghua, S., Jun, Z., Jiasong, H., 2003, “Thermal degradation studies of cyclic olefin copolymers”, Polymer Degradation and Stability, Cilt 81, ss. 197–205.
• Merve, D., Ercan, N., 2016, “Effect of Graphitic Nano-Sheets on the Physical Properties of Cyclic Olefin Copolymer Composite Films”, Polymer-Plastics Technology and Engineering, Cilt 55, Sayı 10, ss. 1021-1029.
• Motlagh, G. H., Hrymak, A. N., Thompson, M. R., 2007, “Properties of a Carbon Filled Cyclic Olefin Copolymer”, Journal of Polymer Science: Part B: Polymer Physics, Cilt 45, ss. 1808–1820.
• O’Neil, C. E., Scott, T., Kumuditha, R., Swathi, P., Varshni, S., Steven, A. S., 2016, “Characterization of Activated Cyclic Olefin Copolymer: Influence of the Ethylene/Norbornene Content on the Physiochemical Properties”, Analyst, Cilt 28, sayı 141(24), ss. 6521-6532.
• Ou, C. F., Hsu, M. C., 2007. “Preparation and characterization of cyclo olefin copolymer (COC)/silica nanoparticle composites by solution blending”, Journal of Polymer Research, Cilt 14; ss. 373– 378.
• Ou, C. F., Hsu, M. C., 2008, “Preparation and Properties of Cyclo-Olefin Copolymer/Titania Hybrids”, Journal of Applied Polymer Science, Cilt 110, ss. 732–737.
• Pal, P., Mrinal, K., K., Anirban, M., Asish, M., Chapal, K. D., 2016, “Synergistic Effect of Halloysite Nanotubes and MA-g-PE on Thermo-Mechanical Properties of Polycarbonate-Cyclic Olefin Copolymer Based Nanocomposite”, Polymer-Plastıcs Technology and Engıneerıng, Cilt 55, Sayı 14, ss. 1481–1488.
• Recep, İ., Erol, F., 2019, “Cam Elyaf Takviyeli Polyester (CTP) Kompozit Malzemelerde Kullanılan Doğal Elyaflar ve Dolgu Maddeleri”, El-Cezerî Fen ve Mühendislik Dergisi, Cilt 6, Sayı 2, ss. 355-381.
• Saravanan, S., Praveen, C. R., Giridhar, M., 2015, “Effects of temperature and clay content on water absorption characteristics of modified MMT clay/cyclic olefin copolymer nanocomposite films: Permeability, dynamic mechanical properties and the encapsulated organic device performance”, Composites: Part B, Cilt 73, ss. 1–9.
• Shang, Y., Yunping, Z., Yifan, L., Ye, Z., Zhenhua, J., Haibo, Z., 2018, “The effect of micron-graphite particle size on the mechanical and tribological properties of PEEK Composites”, High Performance Polymers, Cilt 30, Sayı 2, ss. 153–160.
• Sudheera, M., Hemantha, K., Rajua, K., Thirumaleshwara, B., 2014, “Enhanced Mechanical and Wear Performance of Epoxy/glass Composites with PTW/Graphite Hybrid Fillers”, Procedia Materials Science, Cilt 6, ss. 975-987.
• Sunanda, R., Tanya, D., Chee, Y. Y., Xiao, H., 2014, “Transparent cyclic olefin copolymer/silica Nanocomposites”, Polymer International, Cilt 63, ss. 327–332.
• Yoshinori, H., Hiroshi, I., 2018, “Structural Formation of Cyclic Olefin Copolymer (COC) Films as Revealed by Real Time Retardation Measurements during Fast Stretching Process”, Technologies, Cilt 6, Sayı 60, ss. 1-11.
• Xintao, Z., Gongxiong, L., Qifeng, J., Xuebin, F., Xigao, J., 2008, “On dry sliding friction and wear behavior of PPESK filled with PTFE and graphite”, Tribology International, Cilt 41, ss. 195-201.