UV kürlenmeli vernik uygulanmış karakavak odununda renk, parlaklık, salınımsal sertlik ve yüzeye yapışma direnci üzerine yapay yaşlandırmanın etkisi

Yıl 2022, Cilt: 12 Sayı: 3, 951 - 963, 15.07.2022

Ümit Ayata , Nevzat Çakıcıer , Levent Gürleyen

https://doi.org/10.17714/gumusfenbil.986610

Cited By: 1

Öz

Karakavak odunu mobilya, lambri ve kontrplak üretimi için kullanılmaktadır. Bu çalışmada, karakavak (Populus nigra L.) odununa uygulanmış 3 ve 5 kat UV sistem vernik katmanları ile yapay yaşlandırma uygulaması arasındaki ilişki araştırılmıştır. Buna ek olarak, yaşlandırma öncesi ve sonrasında (252 ve 504 saat) vernikli malzemeler üzerinde renk parametreleri (∆E*, ∆L*, ∆a*, ∆b*, L*, a* ve b*), parlaklık, salınımsal sertlik ve yüzeye yapışma direnci (pull-off) testleri yapılmıştır. Elde edilen sonuçlara göre, her iki vernik türü için UVB-313 lambalarına sahip yaşlandırma koşulları sonralarında yaşlandırma süresinin artması ile yüzeye yapışma direncinde ve L* değerinde azalma belirlenirken, a* ve b* değerleri için artışlar meydana gelmiştir. ∆E* değerleri 3 kat uygulamasının 5 kat uygulamasınınkinden yüksek olduğu görülmüştür. Buna ek olarak, her iki vernik uygulaması için bütün yönlerde ve derecelerde yapılan parlaklık ölçümleri, yaşlandırma süresinin artması ile azaldığı belirlenmiştir. Salınımsal sertlikte 3 kat uygulamasına sahip yüzeylerin, 5 kat uygulamasınınkinden yüksek olduğu görülmüş, her iki vernik türünde de 252. saatin sonunda azalmalar görülürken, 504. saatin sonunda artış elde edilmiştir. Sonuç olarak, istenilen sertlik direncine ait ortam koşullarına göre (mekân zemin tercihi) kullanım alanları doğrultusunda bu malzemenin kullanılması önerile bilinir.

Anahtar Kelimeler

Karakavak, Parlaklık, Renk, Salınımsal sertlik, UV sistem vernik, Yüzeye yapışma

The effect of artificial aging on color, glossiness, pendulum hardness and adhesion to the surface of black poplar wood treated with UV curable varnish

Öz

Black poplar wood is used for the manufacture of furniture, paneling, and plywood. In this study, the relationship between 3 and 5 layers of UV system varnish applied to black poplar (Populus nigra L.) wood and artificial aging was investigated. In addition, before and after aging (252 and 504 hours), color parameters (∆E*, ∆L*, ∆a*, ∆b*, L*, a*, and b*), glossiness, pendulum hardness, and surface adhesion resistance (pull-off) tests were performed on varnished materials. According to the results obtained, for both varnish types, a decrease in surface adhesion resistance and L* value was determined with the increase of aging time after aging conditions with UVB-313 lamps, while increases were determined for a* and b* values. ∆E* values were found to be higher than that of the 3-layer application. In addition, it was determined that the measurements made in all directions and degrees glossiness for both varnish applications decreased with increasing aging time. It was observed that the pendulum hardness of the surfaces with 3 coats application was higher than that of the 5 coat application, while decreases were observed at the end of the 252 hours in both varnish types, while an increase was obtained at the end of the 504 hours. As a result, it is recommended to use this material in line with the usage areas according to the ambient conditions of the desired hardness resistance (space floor preference).

Anahtar Kelimeler

Black poplar, Glossiness, Color, Pendulum hardness, UV system varnish, Adhesion resistance

Kaynakça

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