GENİŞLEYEBİLEN POLİSTİREN ÜRETİMİNDE KALIPLAMAYOĞUNLUĞUNUN TANE KAYNAMASI VE AĞIRLIĞA ETKİSİ
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Date
2014
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Publisher
Düzce Üniversitesi
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info:eu-repo/semantics/openAccess
Abstract
Genişleyebilen polistiren (GPS) köpük üretiminde kalıplama yoğunluğu ve sürelerinin kalıplama sonrası ağırlık değişimi ve tane kaynaması üzerine etkisi incelenmiştir. Deneysel çalışmalarda26,20, 30,70 ve 39,07 kg/m3 kalıplama yoğunlukları ve 20, 30 ve 40 s kalıplama süreleri kullanılarak ASTM D638 standardına göre polistiren numuneler üretilmiştir. Bu numuneler oda sıcaklığında 30 gün süre ile doğal yaşlandırılmıştır. Yaşlandırma sonuçları polistiren köpük numunelerin ağırlık kaybının %99’nu 24 saat sürede gerçekleştiğini ve 30 günde ise tamamlandığını göstermiştir. Kalıplama yoğunluğu ve süresi arttıkça kalıplama sonrası ağırlık değişimleri azalmıştır. Polistiren köpük numunelerde 1,1 atm basınç altında kalıplama sonrası ağırlık değişimi arttıkça kaynama derecesinin düştüğü belirlenmiştir.
The effect of molding densities and times on weight change after molding and the bead fusion was investigated in the production of expandable polystyrene (EPS) foam. In experimental studies, polystyrene samples were produced using 26,20, 30,70 ve 39,07 kg/mmolding densities and 20, 30 and 40 sec molding times according to ASTM D638 standard. Natural aging of these samples were carried out at room temperature for 30 days. Experimental results showed that 99% of losses of EPS foam sample weight in the natural aging process was performed approximately with 24 hours, and was completed with 30 days. The weight change after molding was decreased with increasing molding density and time. It was determined that the fusion degree in polystyrene foam sample was decreased with increasing the weight change after molding under 1.1 atm pressure.
The effect of molding densities and times on weight change after molding and the bead fusion was investigated in the production of expandable polystyrene (EPS) foam. In experimental studies, polystyrene samples were produced using 26,20, 30,70 ve 39,07 kg/mmolding densities and 20, 30 and 40 sec molding times according to ASTM D638 standard. Natural aging of these samples were carried out at room temperature for 30 days. Experimental results showed that 99% of losses of EPS foam sample weight in the natural aging process was performed approximately with 24 hours, and was completed with 30 days. The weight change after molding was decreased with increasing molding density and time. It was determined that the fusion degree in polystyrene foam sample was decreased with increasing the weight change after molding under 1.1 atm pressure.
Description
Keywords
GPS, Kalıplama yoğunluğu, Tane kaynaması, Kaybolan köpük, EPS, Molding density, Bead fusion, Lost foam
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İleri Teknoloji Bilimleri Dergisi
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Volume
3
Issue
2
