DYPE/PANI kompozit filmlerin sıcaklığa ve PANI katkı konsantrasyonuna bağlı olarak dielektrik parametrelerinin GRSA ile tahmini

Yıl 2020, Cilt: 35 Sayı: 2, 1077 - 1088, 25.12.2019

Mehmet Kılıç , Önder Eyecioğlu , Zeynep Güven Özdemir , Ümit Alkan

https://doi.org/10.17341/gazimmfd.422448

Cited By: 4

Öz

Bu çalışmada, düşük
yoğunluklu polietilenin (DYPE) kompleks dielektrik fonksiyonunun gerçek ve sanal
bileşenlerinin (e’ ve e’’
) hem polianilin (PANI) katkısına hem de sıcaklığa bağlı değişimlerinin, genelleştirilmiş
regrasyon sinir ağları (GRSA) metoduyla yüksek doğrulukla tahmin edilebileceği gösterilmiştir.
Bunun için öncelikle, saf DYPE ve kütlece % 0,7, %1 ve %3 PANI katkılandırılmış
DYPE/PANI kompozitler fimler hazırlanmış ve ilgili numunelerin 20 °C, 50 °C ve
80 °C’de e’ ve e’’ bileşenlerinin frekansa
bağlı değişimleri dielektrik spektroskopisi yöntemiyle deneysel olarak
belirlenmiştir. Ardından, dielektrik parametrelerin tahmin değerlerine karşılık
gerçek değerlerine göre çizilen grafikler yardımıyla, GRSA modelinin ilgili
parametrelerin tayinindeki başarı performansı R_e’ =0,9998 ve R_e’’ =0,9365
olarak tespit edilmiştir. Bu noktadan hareketle, GRSA modeli önce mevcut
numunelerin 35 °C, 65 °C ve 95 °C sıcaklıklarda frekansa bağlı olarak e’
ve e’’  bileşenlerinin
değişimini tahmin etmekte kullanılmıştır. Ardından, deneysel olarak hiç
üretilmemiş iki faklı kompozit için (%1,5 ve %6 PANI katkılı DYPE) 20 °C, 35 °C,
50 °C, 65 °C, 80 °C ve 95 °C’de e’ ve e’’
  bileşenlerinin
frekansa bağlı değişimleri GRSA metodu ile önerilmiştir. Böylelikle, hiç
deneysel olarak üretilmemiş bu numunelerin dielektrik parametreleri sıcaklığa
ve frekansa bağlı olarak belirlenebilmiştir. 

Anahtar Kelimeler

Genelleştirilmiş regrasyon sinir ağı, dielektrik spektroskopisi, polietilen, polianilin

Kaynakça

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