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

Bilal AYDOĞAN, Nazım USTA
4.508 1.400

Öz


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. 


Anahtar kelimeler


Rijit poliüretan köpük, nanokil, kabaran alev geciktirici, ısı iletim katsayısı, ısıl bozunma, yanma davranışı

Tam metin:

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DOI: http://dx.doi.org/10.17341/gummfd.50725

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