MECHANICAL PROPERTIES OF NATURAL FIBRE‑REINFORCED SUSTAINABLE EPOXY COMPOSITES

Öz

The use of composites in various fields has increased rapidly due to their advantages such as convenience, stability, tensile, flexural and impact resistance. Mechanical properties in textile composites are closely linked to fiber reinforcement. Flax fibers are used with various polymer materials. The most common matrix material used in flax fibers is epoxy polypropylene, as it is easy to process and has good mechanical properties. Flax fiber reinforced composites have high tensile, flexural and impact strength. Compared to other natural fibers, composites made with flax fibers are costly. In this study, a composite surface was obtained by applying epoxy polymer to the surface of flax fiber reinforced fabric of different lengths and the mechanical properties of the resulting composite samples were examined. As a result of the testing of composites made of flax fibers, tensile strength measured between 17.76 and 26.62 MPa, flexural strength between 28.82 and 46.92 MPa and impact strength of 2.39-5.25 J were measured. The results obtained show that improvements were achieved in the mechanical properties of epoxy resin and flax fiber reinforced polymeric composite materials.

Anahtar Kelimeler

• Composite
• Epoxy resin
• Mechanical properties
• Flax

DOĞAL ELYAF TAKVİYELİ SÜRDÜRÜLEBİLİR EPOKSİ KOMPOZİTLERİN MEKANİK ÖZELLİKLERİ

Öz

Kompozitlerin çeşitli alanlarda kullanımı, vermiş olduğu kolaylık, stabilite, çekme, eğilme ve darbe direnci gibi üstünlüklerde dolayı hızla artmıştır. Tekstil kompozitlerindeki mekanik özellikler lif takviyesi ile yakından bağlantılıdır. Keten lifleri çeşitli polimerler malzemeler ile birlikte kullanılmaktadır. Keten liflerinde kullanılan en yaygın matris malzemesi işlenmesi kolay olduğundan ve iyi mekanik özelliklere sahip olduğundan, epoksi polipropilendir. Keten elyaf takviyeli kompozitler yüksek çekme eğilme ve darbe mukavemetine sahiptir. Diğer doğal liflerle karşılaştırıldığında, keten liflerle yapılan kompozitler maliyetlidir. Bu çalışmada farklı uzunluklarda keten elyaf takviyeli kumaş yüzeyine epoksi polimer uygulanarak kompozit yüzey elde edilmiş ve elde edilen kompozit numunelerin mekanik özellikleri incelenmiştir. Keten liflerinden yapılan kompozitlerin test sonucunda 17,76 ile 26,62 MPa arasında ölçülen çekme mukavemeti, 28,82 ile 46,92 MPa arasında eğilme dayanımı ve 2,39-5,25 J darbe dayanımı ölçülmüştür. Elde edilen sonuçlar epoksi reçine ile keten elyaf takviyeli polimerik kompozit malzemelerin mekanik özelliklerinde iyileşmeler sağlandığını göstermektedir.

Anahtar Kelimeler

• Kompozit
• Epoksi reçine
• Mekanik özellikler
• Keten

Kaynakça

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