Vollastonit ve kaolin katkılı poliamid-6 esaslı kompozitlerin mekanik ve tribolojik performanslarının belirlenmesi

Hüseyin Ünal, Salih Hakan Yetgin

Öz


Bu çalışmada, katkısız poliamid 6 (PA-6) ile ağırlık olarak ayrı ayrı %10 oranında vollastonit ve kaolin katkılı poliamid-6 esaslı polimer kompozitlerin mekanik ve tribolojik özellikleri incelenmiştir.  Poliamid-6 esaslı polimer kompozitler, endüstriyel tip ikiz vidalı bir ekstrüder makinesinde granül formda üretilmiştir.  Deneylerde kullanılan mekanik ve tribolojik test numuneleri geleneksel enjeksiyon makinesi kullanılarak basılmıştır. Katkısız PA-6 ve PA-6 kompozitlerin aşınma ve sürtünme davranışları pim-disk aşınma cihazında ve kuru kayma şartları altında gerçekleştirilmiştir.  Aşınma ve sürtünme davranışları 0.5m/s kayma hızında ve 60N, 120N ve 180N yükler altında yapılmıştır. Çalışma sonucunda, PA-6 polimerine ilave edilen vollastonit ve kaolin katkılar, kompozit malzemelerin çekme dayanımı ve elastiklik modülünü değerlerini artırırken sürtünme katsayısı ve spesifik aşınma hızı değerlerinin azalmasına sebep olmuştur. Buna ilave olarak, tribolojik deneylerde uygulanan yükün artması ile tüm malzemelerin hem sürtünme katsayısı hem de spesifik aşınma hızı değerleri azalmıştır.


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