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Dergiler / Ordu Üniversitesi Bilim ve Teknoloji Dergisi / 2024 / Cilt: 14 Sayı: 2

2-Hidroksipropil Akrilat ve Poli (Etilen Glikol)’den Oluşan ABA Tipi Blok Kopolimerlerin Faz Davranışlarının İncelenmesi

An Investigation on Phase Behavior of ABA-type Block Copolymers Comprising of 2-Hydroxypropyl Acrylate and Poly (Ethylene Glycol)

Efkan Çatıker(ORDU UNIVERSITY)0000-0003-2493-7570
Abdullah Karanfil(ORDU UNIVERSITY)0000-0003-2948-4216
Sayfa
261–272
Yayın Tarihi
2024-12-31
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⚡ TL;DR(1 Cümlede Hızlı Çıkarım)

İncelenen tüm blok kopolimer sistemlerinin 17.2-23.9 oC aralığında düşük kritik çözelti sıcaklığı (LCST) sergilediği ve kopolimerlerdeki EG birimlerinin oranı arttıkça kopolimerlerin CST'sinin arttığı belirlendi.

📌 3 Maddede Bu Makale

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Amaç & Hipotez:2-hidroksipropil akrilat (HPA) ve etilen glikol (EG) segmentlerinden oluşan ABA tipi blok kopolimerleri, 400 ve 1450 gmol-1 ortalama mol kütlesine sahip ticari poli(etilen glikol)’lerden (PEG400 ve PEG1450) elde edilen iki farklı uzunlukta makro-RAFT ajanı kullanılarak RAFT polimerizasyon yöntemiyle hazırlandı.
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Temel Bulgular & Veri:PEG400 ve PEG1450 omurgalı makro-RAFT ajanlarının difonksiyonel uçları HPA birimleri ile uzatılarak her ajandan üçer tane farklı uzunlukta ABA tipi blok kopolimer sentezlenmesi hedeflendi.
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Sonuç & Katkı:İncelenen tüm blok kopolimer sistemlerinin 17.2-23.9 oC aralığında düşük kritik çözelti sıcaklığı (LCST) sergilediği ve kopolimerlerdeki EG birimlerinin oranı arttıkça kopolimerlerin CST'sinin arttığı belirlendi.
🔬Tür:Araştırma Makalesi
📍Kapsam:Genişletilmiş Akademik Örneklem
⚙️Değişkenler:RAFT polimerizasyonu · ABA-tipi blok kopolimer · faz geçişi

Özet

2-hidroksipropil akrilat (HPA) ve etilen glikol (EG) segmentlerinden oluşan ABA tipi blok kopolimerleri, 400 ve 1450 gmol-1 ortalama mol kütlesine sahip ticari poli(etilen glikol)’lerden (PEG400 ve PEG1450) elde edilen iki farklı uzunlukta makro-RAFT ajanı kullanılarak RAFT polimerizasyon yöntemiyle hazırlandı. PEG400 ve PEG1450 omurgalı makro-RAFT ajanlarının difonksiyonel uçları HPA birimleri ile uzatılarak her ajandan üçer tane farklı uzunlukta ABA tipi blok kopolimer sentezlenmesi hedeflendi. Kopolimerlerin yapısal karakterizasyonu FTIR ve 1H-NMR spektroskopisi kullanılarak yapıldı. Kimyasal yapıların doğrulanmasına ek olarak, 1H-NMR spektrumundaki sinyal entegrasyonları, her bir kopolimerdeki ayrı ayrı tekrar eden birimlerin göreceli oranları hakkında bilgi verdi. Blokların bağıl uzunluklarına ve PEG içeriklerine bağlı olarak altı blok kopolimer kritik çözünme sıcaklıkları açısından incelendi. İncelenen tüm blok kopolimer sistemlerinin 17.2-23.9 oC aralığında düşük kritik çözelti sıcaklığı (LCST) sergilediği ve kopolimerlerdeki EG birimlerinin oranı arttıkça kopolimerlerin CST'sinin arttığı belirlendi.

Abstract

ABA-type block copolymers consisting of 2-hydroxypropyl acrylate (HPA) and ethylene glycol (EG) segments were prepared by the RAFT polymerization method using two different lengths of macro-RAFT agents based on commercial poly(ethylene glycol)s with average molar masses of 400 and 1450 gmol-1 (PEG400 and PEG1450). By extending the difunctional ends of PEG400 and PEG1450 vertebrate macro-RAFT agents with HPA units, it was aimed to synthesize three ABA type block copolymers of different lengths from each agent. Structural characterization of the copolymers was performed using FTIR and 1H-NMR spectroscopy. In addition to confirming the chemical structures, signal integrations in the 1H-NMR spectrum provided information about the relative proportions of individual repeating units in each copolymer. Six block copolymers were examined for critical dissolution temperatures based on the relative lengths of the blocks and their PEG content. It was determined that all block copolymer systems examined exhibited lower critical solution temperature (LCST) in the range of 17.2-23.9 oC, and as the ratio of EG units in the copolymers increased, the CST of the copolymers increased.

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Bu Makaleye Atıf Yap

Çatıker, E., Karanfil, A. (2024). 2-Hidroksipropil Akrilat ve Poli (Etilen Glikol)’den Oluşan ABA Tipi Blok Kopolimerlerin Faz Davranışlarının İncelenmesi. Ordu Üniversitesi Bilim ve Teknoloji Dergisi, Cilt: 14 Sayı: 2, 261–272. https://doi.org/10.54370/ordubtd.1505035

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