Kaan Engin, Turhan Koyuncu, Fuat Lüle

Farklı kompozit malzemelerin üretilmesi ve bazı teknik özelliklerinin belirlenmesi

Bu çalışmada; keten lifi, mısır sapı, ayçiçeği sapı, su kamışı, arpa samanı gibi beş farklı doğal destek malzemesi ile cam yünü ve karbon lifi gibi iki farklı sentetik destek malzemesi belirli oranlarda (2.5 g lif/72.5 g PE, 5 g lif/70 g PE, 7.5 g lif/67.5 g PE ve 10 g lif/65 g PE) yüksek yoğunluklu polietilen matris içerisine yerleştirilerek, lif takviyeli kompozit lamine levhalar üretilmiştir. Liflere ya da matrise herhangi bir ön kimyasal işlem uygulanmamıştır. Kompozit lamine levhalar presle kalıplama yöntemi ile üretilmiş, sonrasında ise çekme ve ısı testlerine tabi tutulmuşlardır. Sonuçlar; kompozit numunelerin çekme mukavemetlerinin desteklenmemiş polietilen numunelere göre daha düşük olduğunu fakat mısır sapı, ayçiçeği sapı ve su kamışı ile desteklenmiş kompozit numunelerin, cam yünü ve karbon lifi ile desteklenmiş kompozit numunelere çok yakın çekme mukavemetine sahip olduğunu göstermiştir. Ayrıca kompozit numuneler yüksek sıcaklığa karşı, desteklenmemiş polietilene göre daha az deformasyon göstermişlerdir.

Production of different composite materials and determination of some technical properties

In this study, five different natural reinforce materials as flax fiber, corn stalk, sunflower stalk, reedmace, barley straw and two different synthetic reinforce materials as glass fibers and carbon fibers with different ratios (2.5 g fiber/72.5 g PE, 5 g fiber/70 g PE, 7.5 g fiber/67.5 g PE and 10 g fiber/65 g PE) were placed inside high density polyethylene matrix to produce fiber reinforced composite. No chemical pretreatment were made to the fibers or the matrix. Composite laminate sheets were produced by compression molding process, then tensile tests and heat tests were conducted. Results show that; tensile strengths of the composite samples are lower than unreinforced polyethylene but corn stalk, sunflower stalk and reedmace reinforced sample’s tensile strengths are very close to the composite samples reinforced with glass and carbon fibers. Furthermore most composites show lower deformation against high temperature than unreinforced polyethylene.

Keywords:

Composite material High density polyethylene Natural fibers Synthetic fibers,

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