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NANOKİL VE KABARAN ALEV GECİKTİRİCİ İLAVESİNİN RİJİT POLİÜRETAN KÖPÜK MALZEMELERİN ISIL BOZUNMA VE YANMA DAVRANIŞLARINA ETKİLERİNİN İNCELENMESİ

INVESTIGATION THE EFFECTS OF NANOCLAY AND INTUMESCENT FLAME RETARDANT ADDITIONS ON THERMAL AND FIRE BEHAVIOUR OF RIGID POLYURETHANE FOAMS

Journal Name:

  • Gazi Üniversitesi Mühendislik-Mimarlık Fakültesi Dergisi

Publication Year:

  • 2015

Key Words:

Keywords (Original Language):

Author NameUniversity of AuthorFaculty of Author
Abstract (2. Language): 
Different inorganic materials are added into rigid polyurethane foams for improving properties and reducing production costs. Among them, it was found that nanoclay was added up to 6 % in the total mass. In this study, with the best knowledge of the authors, nanoclay / intumescent flame retardant composed of ammonium polyphosphate and pentaerythritol were added up to 15 % in the total mass into the rigid polyurethane foams for the first time. The effects of nanoclay and intumescent flame retardant additions on the cell size, the coefficient of thermal conductivity, the thermal degradation and the fire resistance were investigated. Furthermore, there is a lack of information in the literature about changes of the thermal conductivity of the foams with respect to time and the effects of fillers and flame retardants on the changes. Therefore, the changes of thermal conductivity coefficients of the foams were examined during two months after the productions. Experimental results indicated that the fire resistance and the thermal stability of the foams could be enhanced with 15 % nanoclay addition. However, nanoclay and the intumescent flame retardant additions into rigid polyurethane foams caused better thermal stability and fire resistance. Meanwhile, it was found that the incorporation of nanoclay / the intumescent flame retardant resulted in slightly increasing in thermal conductivity of the foams.
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Abstract (Original Language): 
Rijit poliüretan köpük malzemelere, bu malzemelerin özeliklerini iyileştirmek ve maliyetleri düşürmek için farklı inorganik maddeler ilave edilmektedir. Bu inorganik maddeler içinde, kilin toplam kütlenin en fazla % 6 oranına kadar poliüretan köpük malzemeye ilave edildiği belirlenmiştir. Bu çalışmada ise, yazarların bilgisi dahilinde, ilk defa % 15'e varan oranda nanokil ve amonyum polifosfat/pentaeritritolden oluşan kabaran alev geciktiricinin ilavesi yapılmıştır. Nanokil ve kabaran alev geciktirici ilavesinin, köpük malzemelerin hücre boyutuna, ısı iletim katsayısına, ısıl bozunma ve yanmaya karşı direncine etkileri incelenmiştir. Bunlara ek olarak, köpük malzemelerin zamanla ısı iletim katsayılarındaki değişim ve dolgu/alev geciktiricilerin bu değişime etkileri üzerine literatürde yeterli bilgi bulunmadığı dikkate alınarak üretimden sonra iki aylık bir süre içerisinde, köpük malzemelerin ısı iletim katsayılarının değişimi de takip edilmiştir. Deneysel sonuçlar, nanokilin % 15 oranında ilavesi ile köpük malzemenin ısıl kararlılığının ve yanma direncinin iyileştirilebileceğini göstermektedir. Bununla birlikte, nanokil ve kabaran alev geciktiricinin birlikte ilavesinin köpük malzemenin ısıl bozunma ve yanmaya karşı direncini daha da iyileştirdiği belirlenmiştir. Aynı zamanda nanokil/kabaran alev geciktirici ilavesinin köpük malzemenin ısı iletim katsayısında az bir miktar artışa sebep olduğu da tespit edilmiştir.
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