Eray ÇALIŞKAN, Fatih BİRYAN, Kenan KORAN

Kalkon Grubu Taşıyan Yeni Akrilamit Polimerinin Hazırlanması, Kinetik ve Dielektrik Özelliklerinin İncelenmesi

Bu çalışmada ilk olarak kalkon grubu içeren yeni bir akrilamit monomeri sentezlendi. Daha sonra serbest radikalik polimermerizasyon yöntemine göre dikümil peroksit başlatıcı varlığında homopolimeri hazırlandı. Elde edilen polimerin termal özelliklerini incelemek ve bozunma aktivasyon enerjinin belirlenebilmesi için farklı ısıtma hızlarında TGA ölçümleri alındı. Tek basamaklı bozunma gösteren polimerin Flynn-Wall-Ozawa yöntemine göre ortalama aktivasyon enerjisi hesaplandı. Karşılaştırmalı TGA eğrilerinden 0.02-0.5 dönüşüm aralığında Flynn-Wall-Ozawa eğrileri oluşturuldu ve ortalama aktivasyon enerjisi 127.03 kJ mol-1 olarak belirlendi. Polimerin dielektrik özellikleri 1-200 kHz frekans aralığında faklı sıcaklıklarda empedans analizör ile incelendi. Oda sıcaklığında polimerin 1 kHz’deki dielektrik sabiti değeri 7.51 iken daha yüksek frekanslara çıkıldıkça bu değer azalmaktadır. 200 kHz değerinde polimerin dielektrik sabiti 7.33 olarak kaydedilmiştir. 10 kHz sabit frekansta oda sıcaklığında 7.44 olarak hesaplanan dielektrik sabiti sıcaklığın artmasıyla birlikte artış göstermiş, 50 oC’ 10.48 ve 60 oC için 14.06 olarak hesaplanmıştır.

Anahtar Kelimeler:

Akrilamit, kalkon, termal özellik, dielektrik özellik

Preparation of a New Acrylamide Polymer Containing Chalcone Croup, Investigation of Its Kinetic and Dielectric Properties

In this study, a new acrylamide monomer containing chalcone group was synthesized and a homopolymer was prepared according to free radical polymerization method in the presence of dicumyl peroxide initiator. In this study, a new acrylamide monomer containing chalcone group was synthesized and a homopolymer was prepared according to free radical polymerization method in the presence of dicumyl peroxide initiator. TGA measurements were taken at different heating rates to examine the thermal properties of the polymer and determine the degradation activation energy. The average activation energy of the one-step degradation polymer was calculated using the Flynn-Ozawa method. Flynn-Wall-Ozawa curves were generated from the comparative TGA curves in the range of 0.02-0.5 transformation, and the average activation energy was determined as 127.03 kJ mol-1. The dielectric properties of the polymer were examined with an impedance analyzer in the frequency range of 1-200 kHz at different temperatures. While the dielectric constant value of the polymer at 1 kHz at room temperature is 7.51, this value decreases towards higher frequencies. The dielectric constant of the polymer at 200 kHz was recorded as 7.33. It was determined that the dielectric constant calculated as 7.44 at 10 kHz fixed frequency at room temperature increased to 10.48 for 50 oC and 14.06 for 60 oC with the increase of temperature.

Keywords:

Acrylamide, chalcone, thermal property, dielectric property,

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