Ertuğrul Altuntaş, Esra Yılmaz, Tufan Salan

Yüksek oranda lif dolgu maddesi kullanımının odun plastik kompozit malzemenin mekanik özellikleri üzerine etkisinin araştırılması

Bu çalışmada yüksek yoğunluklu polietilen (YYPE) ve % 40-70 aralığında değişen oranlarda odun lifi kullanılarak odun plastik kompozit (OPK) malzemeler üretilmiştir. Üretilen bu malzemelerin çekme direnci, eğilme direnci, elastikiyet modülü ve şok direnci gibi mekanik özelliklerine lif oranın etkisi araştırılmıştır. Ayrıca bağlayıcı ajan etkisinin araştırılması için en düşük ve en yüksek odun katkı oranlarına sahip malzemeye maleik anhidrit ile muamele edilmiş polietilen (MAPE) eklenmiştir. Kompozit örnekleri laboratuvar tipi ikiz vidalı ektrüder kullanılarak üretilmiştir ve sıcak presle kalıplama yöntemi ile test levhaları hazırlanmıştır. Sonuçlar göre bağlayıcı ajan olmayan örnek grupları için genel anlamda kompozit malzeme içeriğindeki odun lifi oranının artması mekanik özelliklerdeki eğilme, çekme ve şok dirençlerini azaltırken elastikiyet modülü değerlerini artırmıştır. Ancak malzeme içeriğine bağlayıcı ajan MAPE eklenmesi mekanik özellikleri önemli ölçüde iyileştirmiş. Özellikle %70 odun lifi ve MAPE içeren kompozit örnekler, bağlayıcı içermeyen tüm örnek gruplarından daha iyi mekanik sonuçlar göstermiştir. Sonuç olarak, bu çalışma ile yüksek lif oranı ile düşük maliyetli, hafif ve estetik görünüme ve aynı zamanda iyi mekanik özelliklere sahip OPK malzemelerin üretilebileceği gösterilmiştir.

Anahtar Kelimeler:

Odun lifi, Odun plastik kompozit, Mekanik özellik

Investigation of the effect of high-fibrous filling material on the mechanical properties of wood plastic composites

In this study, wood plastic composite (WPC) materials were produced using high density polyethylene (HDPE) and wood fiber at various ratios ranging from 40% to 70%. The effects of fiber content on mechanical properties such as tensile strength, bending strength, elasticity modulus and shock resistance of these materials were investigated. In addition, maleic anhydride grafted polyethylene (MAPE) was also added to the materials, which had lowest and highest wood fiber additive, to investigate the effect of the binding agent effect. Composite samples were produced via a laboratory type twin screw extruder and test panels were prepared using hot press molding method. According to the results, the bending, tensile and shock resistances generally decreased with the increasing ratio of wood fiber in the composite material content while modulus of elasticity increased for the sample groups without coupling agent. However, the addition of the coupling agent MAPE into the material content significantly improved the mechanical properties. Especially, the addition of MAPE provided better resistance values than all sample groups without MAPE even for the samples containing 70% wood fiber. As a result, with this study, it has been shown that WPC materials with low cost, light weight, aesthetic appearance and good mechanical properties as well could be produced with high fiber ratio.

Keywords:

Wood fiber, Wood plastic composite, Mechanical properties,

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