Influence of Graphite Additives on Mechanical, Tribological, Fire Resistance and Electrical Properties in Polyamide 6

Abstract

New types of polymers are usually produced with different additives. In this work, the effect of graphite addition (1.5wt%, 2wt%, 2.5wt%, 3wt% and 3.5wt%) on material's properties is analysed. Results of current investigation show that there are two possible subtypes (groups) of polyamide, containing 2% and 3.5% graphite, which reveal improved complex properties. By using graphite additives, the material becomes stiffer. In polyamide-2% graphite system, the abrasive wear tends to decrease while the fire resistance improves without significant changes in mechanical properties. In addition to improved tribological and fire resistance behaviour, polyamide with 3.5% graphite addition gains excellent antistatic properties. At the same time, in this material both the tensile and the Charpy impact strengths have decreased by 15% and 30%, respectively, whereas the Young's modulus increases by 6% as a result of dispergation/adhesion between the graphite and polymer.

Designing the organoplastics based on aromatic polyamide, study of their operational properties and applicability

“…However, authors of work [6] showed that the use of antifriction fillers results in a significant reduction of strength and pore formation inside the volume of a polymer, which reduces operational characteristics of such PCMs. Although the introduction of graphite can significantly reduce the friction coefficient, as demonstrated in paper [7], the PCMs that are filled with layered lubricants cannot be operated under harsh conditions and in aggressive environments.…”

Kati Yağlayici Olarak Grafi̇t Katkili Naylon 6 Kompozi̇tleri̇n Mekani̇k Ve Tri̇boloji̇k Performanslari

“…Grafit, molibden disülfit (MoS2) ve politetrafloroetilen (PTFE) gibi bazı katı yağlayıcılar, mükemmel aşınma direnci ve düşük sürtünme özelliklerine sahiptir. Bu malzemeler, sıvı yağlayıcıların istenmediği ve etkisiz olduğu uygulamalarda tribolojik zorlukları çözmek için yaygın olarak kullanılmaktadır (Ben Difallah, Kharrat, Dammak ve Monteil, 2012;Ben Difallah, Kharrat, Dammak ve Monteil, 2014;Kumar & Kanagaraj, 2016;Matyas, 2018;Alajmi, Alrashdan, Alsaeed ve Shalwan, 2020). Bu malzemeler arasında, grafit, polimerlerin tribolojik, mekanik, termal ve elektriksel özelliklerini iyileştirmek için yaygın olarak kullanılan en önemli ve gelecek vaat eden katı yağlayıcılardan biridir (Raffaele, 2016;Dajana, Simon, Mitjan, Janez, Blaz ve Miroslav 2022;Ben Difallah et al, 2012).…”