Polietilen ince filmin dielektrik özelliklerinin frekans, sıcaklığa bağlı davranışı ve camsı geçiş sıcaklığının tespiti

Yıl: 2021 Cilt: 36 Sayı: 2 Sayfa Aralığı: 1105 - 1118 Metin Dili: Türkçe DOI: 10.17341/gazimmfd.822360 İndeks Tarihi: 29-07-2022

Polietilen ince filmin dielektrik özelliklerinin frekans, sıcaklığa bağlı davranışı ve camsı geçiş sıcaklığının tespiti

Öz:
35000 g/mol moleküler ağırlığa sahip külçe halindeki polietilenden (PE), termal buharlaştırma yöntemiyle $10^{-3}$ Torr vakum altında 750 nm kalınlığında PE ince filmler elde edildi. PE ince filmler alüminyum (Al) elektrotlar arasında kapasitör formunda hazırlandı. Hazırlanan PE ince filmlerin $10-10^{6}$ rad/s açısal frekans ve 233 – 373 K sıcaklık aralığında dielektrik ölçümleri yapıldı. Elde edilen sonuçlar Cole-Cole modeli ile analiz edildiğinde PE ince filmlerin dielektrik sabitinin oda sıcaklığında yaklaşık 20 olduğu, yapıda üç farklı polarlanma mekanizmasının farklı frekans ve sıcaklık aralıklarında etkili olduğu görüldü. Bu mekanizmalardan α-rölaksasyonunun polimerlerde gözlenen camsı geçiş davranışını temsil ettiği belirlendi. Vogel-Fulcher-Tamman (VFT) modeli kullanılarak yapılan analizde PE ince filmin camsı geçiş sıcaklığının 315 K (42ᵒC) civarında olduğu tespit edildi. PE ince filmin, termal buharlaştırma yöntemiyle üretilmesinde ana zincirinde kırılmalar meydana gelebileceği ve lineer bir zincir formundan çapraz bağlı ağ formuna geçilebileceği görülmüştür. Elde edilen sonuçlar PE’nin ince film formunda külçe formuna kıyasla daha yüksek dielektrik sabit değerlerine ulaşabildiğini göstermiştir. Buna göre, PE ince filmin mikro ve nano boyutta enerji depolama sistemlerinde kullanımı da mümkün olabilir.
Anahtar Kelime: camsı geçiş sıcaklığı AC iletkenlik Dielektrik sabit elektrik modül polyetilen ince film

Frequency, temperature-dependent behavior of dielectric properties and determination of glass transition temperature of polyethylene thin film

Öz:
PE thin films of 750 nm thickness were obtained from polyethylene in the form of bulk (PE) with a molecular weight of 35000 g/mol under $10^{-3}$ Torr vacuum by the thermal evaporation method. PE thin films were prepared in the form of capacitors between aluminum (Al) electrodes. Dielectric measurements of the prepared PE thin films were operated at an angular frequency of$10-10^{6}$ rad/s and a temperature range of 233-373 K. When the obtained results were analyzed with the Cole-Cole model, it was seen that the dielectric constant of PE thin films was about 20 at room temperature, and three different polarization mechanisms were effective in different frequency and temperature ranges. Among these mechanisms, it was determined that α-relaxation represented the glass transition behavior. In the analysis performed using the VogelFulcher-Tamman (VFT) model, it was determined that the glass transition temperature of the PE thin films was around 315 K (42℃). It has been observed that in the production of PE thin film by a thermal evaporation method, breakages may occur in the main chain and a transition from linear chain form to a cross-linked network form. The results obtained showed that PE can reach higher dielectric constant values in thin-film form compared to bulk form. Accordingly, it may be possible to use PE thin film in micro and nano-size energy storage systems.
Anahtar Kelime:

Belge Türü: Makale Makale Türü: Araştırma Makalesi Erişim Türü: Erişime Açık
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APA Yakut S (2021). Polietilen ince filmin dielektrik özelliklerinin frekans, sıcaklığa bağlı davranışı ve camsı geçiş sıcaklığının tespiti. , 1105 - 1118. 10.17341/gazimmfd.822360
Chicago Yakut Sahin Polietilen ince filmin dielektrik özelliklerinin frekans, sıcaklığa bağlı davranışı ve camsı geçiş sıcaklığının tespiti. (2021): 1105 - 1118. 10.17341/gazimmfd.822360
MLA Yakut Sahin Polietilen ince filmin dielektrik özelliklerinin frekans, sıcaklığa bağlı davranışı ve camsı geçiş sıcaklığının tespiti. , 2021, ss.1105 - 1118. 10.17341/gazimmfd.822360
AMA Yakut S Polietilen ince filmin dielektrik özelliklerinin frekans, sıcaklığa bağlı davranışı ve camsı geçiş sıcaklığının tespiti. . 2021; 1105 - 1118. 10.17341/gazimmfd.822360
Vancouver Yakut S Polietilen ince filmin dielektrik özelliklerinin frekans, sıcaklığa bağlı davranışı ve camsı geçiş sıcaklığının tespiti. . 2021; 1105 - 1118. 10.17341/gazimmfd.822360
IEEE Yakut S "Polietilen ince filmin dielektrik özelliklerinin frekans, sıcaklığa bağlı davranışı ve camsı geçiş sıcaklığının tespiti." , ss.1105 - 1118, 2021. 10.17341/gazimmfd.822360
ISNAD Yakut, Sahin. "Polietilen ince filmin dielektrik özelliklerinin frekans, sıcaklığa bağlı davranışı ve camsı geçiş sıcaklığının tespiti". (2021), 1105-1118. https://doi.org/10.17341/gazimmfd.822360
APA Yakut S (2021). Polietilen ince filmin dielektrik özelliklerinin frekans, sıcaklığa bağlı davranışı ve camsı geçiş sıcaklığının tespiti. Gazi Üniversitesi Mühendislik Mimarlık Fakültesi Dergisi, 36(2), 1105 - 1118. 10.17341/gazimmfd.822360
Chicago Yakut Sahin Polietilen ince filmin dielektrik özelliklerinin frekans, sıcaklığa bağlı davranışı ve camsı geçiş sıcaklığının tespiti. Gazi Üniversitesi Mühendislik Mimarlık Fakültesi Dergisi 36, no.2 (2021): 1105 - 1118. 10.17341/gazimmfd.822360
MLA Yakut Sahin Polietilen ince filmin dielektrik özelliklerinin frekans, sıcaklığa bağlı davranışı ve camsı geçiş sıcaklığının tespiti. Gazi Üniversitesi Mühendislik Mimarlık Fakültesi Dergisi, vol.36, no.2, 2021, ss.1105 - 1118. 10.17341/gazimmfd.822360
AMA Yakut S Polietilen ince filmin dielektrik özelliklerinin frekans, sıcaklığa bağlı davranışı ve camsı geçiş sıcaklığının tespiti. Gazi Üniversitesi Mühendislik Mimarlık Fakültesi Dergisi. 2021; 36(2): 1105 - 1118. 10.17341/gazimmfd.822360
Vancouver Yakut S Polietilen ince filmin dielektrik özelliklerinin frekans, sıcaklığa bağlı davranışı ve camsı geçiş sıcaklığının tespiti. Gazi Üniversitesi Mühendislik Mimarlık Fakültesi Dergisi. 2021; 36(2): 1105 - 1118. 10.17341/gazimmfd.822360
IEEE Yakut S "Polietilen ince filmin dielektrik özelliklerinin frekans, sıcaklığa bağlı davranışı ve camsı geçiş sıcaklığının tespiti." Gazi Üniversitesi Mühendislik Mimarlık Fakültesi Dergisi, 36, ss.1105 - 1118, 2021. 10.17341/gazimmfd.822360
ISNAD Yakut, Sahin. "Polietilen ince filmin dielektrik özelliklerinin frekans, sıcaklığa bağlı davranışı ve camsı geçiş sıcaklığının tespiti". Gazi Üniversitesi Mühendislik Mimarlık Fakültesi Dergisi 36/2 (2021), 1105-1118. https://doi.org/10.17341/gazimmfd.822360