Mehmet KARAMANOĞLU, Alperen KAYMAKCI, Önder TOR

Maleik Anhidrit ile Graftlanmış Polipropilen ile Muamele Edilmiş Odun Polimer Kompozitlerde Vidalama Torklarının Belirlenmesi

Bu çalışmada, maleik anhidrit ile graftlanmış polipropilen ile muamele edilmiş (MAPP) odun polimer kompozitlerde vidalama torkunu etkileyen faktörlerin araştırılması amaçlanmıştır. Bu amaç doğrultusunda çam odun unu, polipropilen ve uyum sağlayıcı madde çift vidalı bir ekstruder içerisinde karıştırılmıştır. Vidalama işleminde iki ayrı vidalama tork değeri mevcuttur. Bunlardan bir tanesi vidanın malzemenin içerisine tam oturduğu ve sıkıştırma işleminin başladığı anda ki tork değeridir. Diğeri ise, vidanın malzeme içerisinde boşta dönmesinden hemen önceki tork değeridir ve maksimum tork olarakta adlandırılır. Vidalama torku genellikle yonga levhalarda ve liflevhalarda çalışılmıştır. Maleik anhidrit ile graftlanmış polipropilenin (MAPP) odun polimer kompozitler de ki vidalama performansı araştırılmamıştır. Bu malzeme üzerinde vidalama torkları kılavuz deliği ve vida türü faktörlerinin etkileri incelenmiştir. MAPP ile muamele edilmiş odun polimer kompozitlerin yüzeylerinde yapılan bu çalışmanın en önemli sonucu, kılavuz deliği ve vida türünün oturma torku ve maksimum tork üzerine istatiksel olarak önemli etkisinin olduğu bulunmuştur.

Screw Driving Torques in Wood Polymer Composite Compatibilized with Maleic Anhydride-grafted Polypropylene

This study aimed to investigate the characteristics of screw driving torques in wood-polymer composite (WPC) compatibilized with maleic anhydride-grafted polypropylene (MAPP). To meet this objective, pine wood flour, polypropylene with coupling agent (maleic anhydride grafted polypropylene) were compounded in a twin screw extruder. The process of screw driving had two main torques, one of which was the seating torque defined as the torque required to clamp parts and other one was the stripping torque defined as the maximum torque right before screw strips in the material and the torque drops suddenly because of the formed screw threads being stripped in wood-based composites. However, there is no such a study about the screw driving torques in WPC compatibilized with MAPP. Therefore, the characteristics of screw driving torques was investigated in this material. Results indicated a good margin between seating and stripping torques when driving screws in the face of WPC compatibilized with MAPP.

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