Yıl: 2021 Cilt: 9 Sayı: 1 Sayfa Aralığı: 205 - 215 Metin Dili: İngilizce DOI: 10.36306/konjes.782105 İndeks Tarihi: 16-09-2021

ELECTRICAL AND THERMAL CONDUCTIVITIES OF IRON (II, III) OXIDE ADDED RIGID POLYURETHANE FOAM NANOCOMPOSITES

Öz:
Effect of iron (II, III) oxide particles on the electrical and thermal conductivities and thermaltransitions of rigid polyurethane foams, and hence on the final density and microstructure of these porousmaterials were investigated. The microstructure study of iron (II, III) oxide added rigid polyurethane foamnanocomposites indicated a drop by 27% of the mean cell size from 294 µm for the neat polyurethane to215 µm for a filler content of 50wt.% and an increase of the mean strut thickness as a function of the fillercontent. The thermal transition results demonstrated that as the magnetite content rises a visible decreaseby 32% of the glass transition temperature appears in the case of soft segments when the glass transitiontemperature representing hard segments remains constant. Results of the electrical conductivitymeasurements showed a significant increase by 17% up to the higher filler content of 50wt.% comparedto the unfilled polyurethane foam. The thermal conductivity results of iron (II, III) oxide added rigidpolyurethane foam nanocomposites revealed a thermal insulating effect of magnetite particles due to thedecrease of the thermal conductivity and stabilization after a slight rise from 0.02431W/m.K to0.02648W/m.K depicted for a filler amount of 4wt.%.
Anahtar Kelime:

Demir (II, III) Oksit Katkılı Rijit Poliüretan Köpük Nanokompozitlerin Elektriksel ve Termal İletkenlikleri

Öz:
Demir (II, III) oksit partiküllerinin rijit poliüretan köpüklerin elektrik ve termal iletkenlikleri ile termal geçişlerine ve dolayısıyla bu gözenekli malzemelerin nihai yoğunluğu ve mikroyapısına etkisi araştırılmıştır. Demir (II, III) oksit eklenmiş rijit poliüretan köpük nanokompozitlerin mikroyapı çalışması, ortalama hücre boyutunun katkısız poliüretan için 294 µm değerinden ağırlıkça %50 katkılı köpük için 215 µm değerine kadar, %27 oranında bir düşüş ve katkı oranına bağlı olarak ortalama duvar kalınlığında bir artış olduğunu göstermiştir. Termal geçiş sonuçları, magnetit oranı arttıkça yumuşak segmentler için camsı geçiş sıcaklığında %32 oranında gözle görülür bir düşüşün ortaya çıktığını ve sert segmentleri temsil eden camsı geçiş sıcaklığının sabit kaldığını göstermiştir. Elektriksel iletkenlik ölçümlerinin sonuçları, katkısız poliüretan köpüğe kıyasla ağırlıkça %50 katkı oranına kadar %17 oranında önemli bir artış göstermiştir. Demir (II, III) oksit eklenmiş rijit poliüretan köpük nanokompozitlerin termal iletkenlik sonuçları, ağırlıkça %4 katkı oranı için 0.02431W/m.K değerinden 0.02648W/m.K değerine kadar gözlemlenen hafif bir artıştan sonra termal iletkenliğin azalması ve stabilizasyonu nedeniyle manyetit parçacıklarının ısıl yalıtım etkisini ortaya çıkarmıştır.
Anahtar Kelime:

Belge Türü: Makale Makale Türü: Araştırma Makalesi Erişim Türü: Erişime Açık
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APA AKKOYUN KURTLU M (2021). ELECTRICAL AND THERMAL CONDUCTIVITIES OF IRON (II, III) OXIDE ADDED RIGID POLYURETHANE FOAM NANOCOMPOSITES. , 205 - 215. 10.36306/konjes.782105
Chicago AKKOYUN KURTLU Meral ELECTRICAL AND THERMAL CONDUCTIVITIES OF IRON (II, III) OXIDE ADDED RIGID POLYURETHANE FOAM NANOCOMPOSITES. (2021): 205 - 215. 10.36306/konjes.782105
MLA AKKOYUN KURTLU Meral ELECTRICAL AND THERMAL CONDUCTIVITIES OF IRON (II, III) OXIDE ADDED RIGID POLYURETHANE FOAM NANOCOMPOSITES. , 2021, ss.205 - 215. 10.36306/konjes.782105
AMA AKKOYUN KURTLU M ELECTRICAL AND THERMAL CONDUCTIVITIES OF IRON (II, III) OXIDE ADDED RIGID POLYURETHANE FOAM NANOCOMPOSITES. . 2021; 205 - 215. 10.36306/konjes.782105
Vancouver AKKOYUN KURTLU M ELECTRICAL AND THERMAL CONDUCTIVITIES OF IRON (II, III) OXIDE ADDED RIGID POLYURETHANE FOAM NANOCOMPOSITES. . 2021; 205 - 215. 10.36306/konjes.782105
IEEE AKKOYUN KURTLU M "ELECTRICAL AND THERMAL CONDUCTIVITIES OF IRON (II, III) OXIDE ADDED RIGID POLYURETHANE FOAM NANOCOMPOSITES." , ss.205 - 215, 2021. 10.36306/konjes.782105
ISNAD AKKOYUN KURTLU, Meral. "ELECTRICAL AND THERMAL CONDUCTIVITIES OF IRON (II, III) OXIDE ADDED RIGID POLYURETHANE FOAM NANOCOMPOSITES". (2021), 205-215. https://doi.org/10.36306/konjes.782105
APA AKKOYUN KURTLU M (2021). ELECTRICAL AND THERMAL CONDUCTIVITIES OF IRON (II, III) OXIDE ADDED RIGID POLYURETHANE FOAM NANOCOMPOSITES. Konya mühendislik bilimleri dergisi (Online), 9(1), 205 - 215. 10.36306/konjes.782105
Chicago AKKOYUN KURTLU Meral ELECTRICAL AND THERMAL CONDUCTIVITIES OF IRON (II, III) OXIDE ADDED RIGID POLYURETHANE FOAM NANOCOMPOSITES. Konya mühendislik bilimleri dergisi (Online) 9, no.1 (2021): 205 - 215. 10.36306/konjes.782105
MLA AKKOYUN KURTLU Meral ELECTRICAL AND THERMAL CONDUCTIVITIES OF IRON (II, III) OXIDE ADDED RIGID POLYURETHANE FOAM NANOCOMPOSITES. Konya mühendislik bilimleri dergisi (Online), vol.9, no.1, 2021, ss.205 - 215. 10.36306/konjes.782105
AMA AKKOYUN KURTLU M ELECTRICAL AND THERMAL CONDUCTIVITIES OF IRON (II, III) OXIDE ADDED RIGID POLYURETHANE FOAM NANOCOMPOSITES. Konya mühendislik bilimleri dergisi (Online). 2021; 9(1): 205 - 215. 10.36306/konjes.782105
Vancouver AKKOYUN KURTLU M ELECTRICAL AND THERMAL CONDUCTIVITIES OF IRON (II, III) OXIDE ADDED RIGID POLYURETHANE FOAM NANOCOMPOSITES. Konya mühendislik bilimleri dergisi (Online). 2021; 9(1): 205 - 215. 10.36306/konjes.782105
IEEE AKKOYUN KURTLU M "ELECTRICAL AND THERMAL CONDUCTIVITIES OF IRON (II, III) OXIDE ADDED RIGID POLYURETHANE FOAM NANOCOMPOSITES." Konya mühendislik bilimleri dergisi (Online), 9, ss.205 - 215, 2021. 10.36306/konjes.782105
ISNAD AKKOYUN KURTLU, Meral. "ELECTRICAL AND THERMAL CONDUCTIVITIES OF IRON (II, III) OXIDE ADDED RIGID POLYURETHANE FOAM NANOCOMPOSITES". Konya mühendislik bilimleri dergisi (Online) 9/1 (2021), 205-215. https://doi.org/10.36306/konjes.782105