Sıcak Plaka Kaynak Yöntemi ile Birleştirilmiş Benzer ve Benzer Olmayan Alçak Yoğunluklu Polietilen (AYPE) Bağlantıların Mekanik Özelliklerinin Karşılaştırmalı Olarak Araştırılması

Year 2020, Volume: 22 Issue: 66, 861 - 874, 22.09.2020

Nahit Öztoprak

https://doi.org/10.21205/deufmd.2020226620

Abstract

Polimerlerin kullanımıyla ilgili endüstriyel talepler ve dolayısıyla daha güvenilir birleştirme teknikleri arayışı giderek artmaktadır. Termoplastikleri birleştirmek için en basit ve ekonomik yöntemlerden biri olan Sıcak Plaka Kaynağı (SPK) kullanımının güçlü bağlantılar ürettiği bilinmektedir. Bu çalışma, Alçak Yoğunluklu Polietilen (AYPE) malzeme ile Yüksek Yoğunluklu Polietilen (YYPE) malzemenin uygun parametreler eşliğinde SPK yöntemi kullanılarak, güvenilir biçimde birleştirilmesinin mümkün olduğunu ortaya koymaktadır. Araştırmada, benzer ve farklı polietilen sınıfları birbirleri ile birleştirilerek, bağlantıların mekanik özellikleri, çekme dayanımı ve çarpma davranışları açısından incelenmiştir. Elde edilen sonuçlar ana malzemeler ve bağlantıların kendi arasında karşılaştırılmıştır. Çekme deneyleri sonrası bağlantıların kırılma yüzeyleri de irdelenmiştir. Buna göre, AYPE malzemeler YYPE malzemeler ile birleştirilerek, AYPE malzemelerin kendi aralarındaki kaynak işlemine göre daha üstün çekme dayanımı ve şekil değiştirme davranışı elde edilmiştir. İlaveten, benzer olmayan kaynak bağlantılarında benzer bağlantılara göre çarpma enerjisinin büyük ölçüde arttığı belirlenmiştir.

Keywords

Sıcak plaka kaynağı, Düşük yoğunluklu polietilen, Yüksek yoğunluklu polietilen, Mekanik özellikler

Comparative Investigation of Mechanical Properties of Similar and Dissimilar Low Density Polyethylene (LDPE) Welds Joined with Hot Plate Welding Method

Abstract

Industrial demands of utilizing polymers and therefore, the search for more reliable joining techniques is gradually increasing. The use of Hot Plate Welding (HPW), which is one of the simplest and most economical methods of joining thermoplastics, is known to manufacture strong joints. This study reveals that it is possible to join LDPE and HDPE snugly using HPW method with appropriate parameters. In the research, similar and dissimilar polyethylene classes are joined with each other and mechanical properties of the joints are examined in terms of the tensile strength and impact behaviors. Obtained results are compared considering the base materials themselves and between the joints. After the tensile tests, fracture surfaces of the joints are also scrutinized. Accordingly, LDPE are joined with HDPE, resulting in superior tensile strength and deformation behavior compared to the welding process of LDPE materials among themselves. Additionally, it has been reported that the impact energy significantly increases in dissimilar welds in comparison to the similar welds.

Keywords

Hot plate welding, Low-density polyethylene, High-density polyethylene, Mechanical properties

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