Polietilen Oksitin Ultrasonik Zincir Kırılması: Konsantrasyon ve Sıcaklık Etkisi

Yıl 2017, Cilt: 17 Sayı: 1, 109 - 116, 24.04.2017

Ali Akyüz

Öz

Polietilen oksitin sulu çözeltilerde ultrasonik zincir kırılması çalışılmıştır. Çözelti konsantrasyonu ve

sıcaklığın polietilen oksit zincir kırılmasına etkileri incelenmiştir. Sonikasyon 20 kHz ultrases frekansında

sabit güç ile 1x10-3, 2x10-3, 3x10-3, 4x10-3 g/mL polietilen oksit konsantrasyonlarında ve 10, 20, 30, 40 0C

sıcaklıklarda gerçekleştirilmiştir. Polimer zincir kırılması çözeltinin spesifik viskozitesinin sonikasyon

zamanına göre değişimi cinsinden karakterize edilmiştir. Teorik Madras ve Giz zincir kırılması modelleri

viskozite ortalama molekül ağırlığı değişimini analiz etmek ve limit molekül ağırlığı – kırılma sabiti

belirlemek için kullanılmıştır. Sonuçlar viskozite-molekül ağırlığının azaldığını ve zincir kırılmasının daha

düşük sıcaklıklar ve çözelti konsantrasyonlarında daha hızlı ilerlediğini göstermektedir.

Anahtar Kelimeler

Ultrases Polietilen Oksit Viskozite

Kaynakça

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