Mehmet KILIÇ, Önder EYECİOĞLU, Zeynep GÜVEN ÖZDEMİR, Ümit ALKAN

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

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 Re’ =0,9998 ve Re’’ =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

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