Mechanical and dielectric behavior of LDPE/Bi-1212 films

Abstract

The present study deals with the improvement of the mechanical and dielectric properties of low-density polyethylene (LDPE) by incorporating BiSr2CaCu2O6.5(coded as Bi-1212) ceramic powder. In this context, LDPE/Bi-1212 films with different ceramic weight contents were prepared by hot press technique. The ceramic reinforcing material was produced by a solid-state reaction technique. While the surface morphologies of the films were determined using a scanning electron microscope (SEM), the chemical structure analyses of the samples were performed by Fourier transform infrared (FTIR) spectroscopy. The mechanical performances of the specimens were evaluated by determining the tensile strength, Young’s modulus, percentage strain at break, and energy at the break values obtained by stress-strain curves. The real and imaginary components of the complex permittivity, as well as the alternating current (ac) conductivities of the samples, were measured within in the frequency interval of 1 Hz-1 MHz between 293 K and 353 K. As a result of tensile properties analyses as well as the investigations of ac electrical parameters, it was revealed that the LDPE/1.0 wt.-% Bi-1212 composite has a promising potential in electronic applications due to its improved mechanical durability, charge storage ability and conductivity.

LDPE/Bi2O3 nanocomposites: Enhanced mechanical, dielectric, and optical properties

“…In the present study, the dielectric constant value of the pure LDPE is also consistent with the scientific literature and was observed as approximately 1.85. In another study conducted by Alkan et al, the 𝜀′ value for the pure LDPE was reported as 2.10 33 . Additionally, it was determined that the values of the nanocomposites with 0.5%, 1% and 2% n‐Bi 2 O 3 contribution by weight exhibit frequency‐dependent characteristic, since the reinforcing nanoparticle contribution rate is low.…”

“…In another study conducted by Alkan et al, the ε 0 value for the pure LDPE was reported as 2.10. 33 Additionally, it was determined that the ε 0 values of the nanocomposites with 0.5%, 1% and 2% n-Bi 2 O 3 contribution by weight exhibit frequency-dependent characteristic, since the reinforcing nanoparticle contribution rate is low. Besides, by the weight 0.5% Bi 2 O 3 nanoparticle adding increased the ε 0 value from 1.85 to 2.00.…”

Bazalt/PANI Kompozitlerinin Dielektrik Özelliklerinin Tahmini için Makine Öğrenmesi Modellerinin Karşılaştırılması

“…Bu özellikler, sıcaklık, frekans gibi dış etkiler altında katkı malzemeleri ile ayarlanabilmektedir. Fakat istenilen dielektrik özelliklere sahip malzemeyi üretebilecek uygun kombinasyonların bulunması çok yoğun deneysel çabaya ihtiyaç duymaktadır (Alkan et al, 2020;Kılıç, 2020;Kılıç, Ergin, Karabul, & Özdemir, 2019). Yoğun zaman ve maliyet gerektiren bu süreçleri Makine öğrenmesi gibi Yapay zekâ modeller kullanarak optimize etmek mümkündür (Eyecioglu, Karabul, Alkan, Kilic, & Icelli, 2016;Eyecioglu, Kılıç, & Özdemir, 2018;Kılıç, Eyecı̇oglu, Özdemı̇r, & Alkan, 2019).…”

“…PANI' nin dikkat çekici ayarlanabilir elektriksel özelliklerine rağmen mekanik dayanıklılığı zayıftır. Hem bu elektriksel özellikleri sağlayan hem de ısısal ve mekanik olarak dayanıklı polimer içerikli kompozit malzemeler üzerine yoğun bir şekilde çalışılmaktadır (Alkan, Kılıç, Karabul, & Güven, 2020;Narayanankutty & Engineering, 2011;Sukitpaneenit, Thanpitcha, Sirivat, Weder, & Rujiravanit, 2007;Wen-Zhi et al, 2006). Bu çalışmalardaki temel zorluklardan birisi de, polimer kompozitlerin çok sayıdaki olası kombinasyonlarının numunelerinin hazırlanması ve elektriksel ve mekanik özelliklerin, katkı bileşenleri, katkı konsantrasyonu, sıcaklık gibi bir çok parametreye doğrusal olmayan şekilde bağlı değişimlerinin deneysel olarak test edilmesidir.…”