Evaluation of hornbeam (Carpinus betulus L.) wood sanding dust in thermoplastic composite production

Abstract

In this study, composite materials were obtained after mixing hornbeam (Carpinus betulus L.) wood sanding dust and high-density polyethylene (HDPE) in a twin-screw extruder. Tensile, bending and hardness tests were carried out to determine the mechanical properties of the composites. In addition to these, Differential Scanning Calorimeter (DSC) analysis and Limit Oxygen Index (LOI) tests were performed to determine the thermal properties of composites. According to the mechanical test results, the highest tensile strength value was determined 27.92 MPa in the 20% wood sanding dust added sample. In addition, the lowest tensile strength value was determined as 26.17 MPa in the 5% sanding dust added composite sample. According to the bending strength test results, the highest bending strength value was determined as 40.72 MPa in the 20% sanding dust added composite sample. In addition, the lowest bending strength was determined as 34.82 MPa and 34.74 MPa values, respectively, in neat polymer and 5% wood sanding dust added samples. According to the results of DSC analysis, a decrease in the crystallinity values was observed as a result of adding wood sanding dust into the polymer matrix. According to the results of the LOI test, with the increase in the wood sanding dust ratio in the composite mixture, the amount of oxygen required for the combustion of the composites increased.

Keywords

• hornbeam
• sanding dust
• thermoplastic composite
• DSC crystallinity

Gürgen (Carpinus betulus L.) odunu zımpara tozunun termoplastik kompozit üretiminde değerlendirilmesi

Abstract

Bu çalışmada, gürgen (Carpinus betulus L.) odunu zımpara tozu ile yüksek yoğunluklu polietilen (YYPE), çift burgulu ekstruderde karıştırıldıktan sonra kompozit malzemeler elde edilmiştir. Elde edilen kompozitlerin mekanik özelliklerini belirlemek için çekme, eğilme ve sertlik direnci testleri yapılmıştır. Bunlara ek olarak, kompozitlerin termal özelliklerini belirlemek için Diferansiyel Taramalı Kalorimetre (DSC) analizleri ve Limit Oksijen İndeksi (LOI) testleri yapılmıştır. Mekanik test sonuçlarına göre çekme direnci değeri en yüksek kompozit örneği %20 zımpara tozu ilaveli örnekte 27.92 MPa belirlenmiştir. Ayrıca en düşük çekme direnci değeri, %5 zımpara tozu ilaveli kompozit örneğinde 26.17 MPa olarak belirlenmiştir. Eğilme direnci testi sonuçlarına göre en yüksek eğilme direnci değeri, %20 zımpara tozu ilaveli kompozit örneğinde, 40.72 MPa olarak belirlenmiştir. Ayrıca en düşük eğilme direnci 34.82 MPa ve 34.74 MPa değerleri ile sırasıyla saf polimer ve %5 zımpara tozu ilaveli örneklerde tespit edilmiştir. DSC analizi sonuçlarına göre polimer matrise zımpara tozu ilave edilmesi sonucu kristalite değerlerinde azalış görülmüştür. LOI testi sonucuna göre kompozit karışımındaki zımpara tozu oranındaki artışla beraber kompozitlerin yanmaları için ihtiyaç duydukları oksijen miktarında artış görülmüştür.

Keywords

• gürgen
• zımpara tozu
• termoplastik kompozit
• DSC kristalite

Thanks

Bu çalışmanın yapılmasında laboratuvar desteğinden dolayı Prof. Dr. M. Hakkı ALMA’ ya teşekkür ederim.

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