UV YAŞLANDIRMA UYGULANAN POLİPROPİLEN/ÇİNKO BORAT (ZnHBO3) POLİMER KOMPOZİTLERİNİN MEKANİK ÖZELLİKLERİNİN İNCELENMESİ

Öz

Plastik malzemelerin gün geçtikçe artan bir kullanım alanına sahip olmaları ve teknolojideki yeni gelişmeler, plastik sektörünü sürekli bir gelişim içine sokmuştur. Üretim yöntemi açısından geniş yelpazeye sahip olan plastikler aynı zamanda kimyasal ve fiziksel özelliklerinin istenilen yönde değiştirilebilir olması sebebiyle geleneksel malzemelerin yerini almıştır. Üretim aşamasında fonksiyonel dolgu-katkı maddeleri kullanıldığında meydana gelen yapısal değişikler, elde edilen yeni plastiğin birçok mekanik ve fiziksel özelliğinde gelişmelere sebep olur. Diğer katkı malzemelerine kıyasla bor ve bor bileşiklerinin katkı malzemesi olarak kullanılması alanında literatürde çok az çalışma bulunmaktadır. Bu çalışmada çinko boratın (ZnB) polipropilenin (PP) fiziksel ve morfolojik özellikleri üzerine etkileri araştırılmıştır. Ayrıca çalışmada üretilen polimer kompozitlere 70C sıcaklıkta 15 ve 30 gün boyunca UV yaşlandırma yapılarak yaşlandırmanın etkileri incelenmiştir. Farklı konsantrasyonlara sahip (%5, 10, 15, 20) PP/ZnB polimer kompozitleri, daha homojen bir karışım sağlanması adına çift vidalı ekstrüzyon makinesinde üretilmişlerdir. Kırıcı yardımı ile granül formuna getirilen polimer kompozitlere ait test numuneleri enjeksiyon makinesinde başarılı şekilde kalıplanmıştır. Numunelerin mekanik davranışını incelemek için çekme, sertlik, darbe, yoğunluk testi yapılmıştır. Ayrıca polimer kompozitlerin mikroyapı incelemesi taramalı elektron mikroskopu (SEM) ile yapılmıştır.

Anahtar Kelimeler

• Polipropilen
• polimer kompozit
• çinko borat
• mekanik özellikler
• UV yaşlandırma

Effect of UV aging on mechanical properties of polypropylene/zinc borate (ZnHBO3) polymer composites

Öz

The fact that plastic materials have an increasing usage area and new developments in technology have brought the plastics industry into a continuous development. Plastics, which have a wide range in terms of production method, have also replaced traditional materials because their chemical and physical properties can be changed in the desired direction. The structural changes that occur when functional filler-additives are used during production cause improvements in many mechanical and physical properties of the new plastic obtained. Compared to other additives, there are very few studies in the literature on the use of boron and boron compounds as additives. In this study, the effects of zinc borate (ZnB) on the mechanical and morphological properties of polypropylene (PP) were investigated. In addition, the effects of aging were investigated by UV aging at 70C for 15 and 30 days on the polymer composites produced in the study. PP/ZnB polymer composites with different concentrations (5, 10, 15, 20%) were produced in a twin screw extruder to provide a more homogeneous mixture. Test samples of polymer composites, which were brought into granule form with the help of a grinder, were successfully molded in the injection machine. In order to examine the mechanical behavior of the samples tensile, hardness, impact and density tests were carried out. In addition, the microstructure examination of polymer composites was made with a scan electron microscope (SEM).

Anahtar Kelimeler

• Polypropylene
• polymer composites
• zinc borate
• mechanical properties
• UV aging

Kaynakça

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