Adnan KURT, Ahmet Faruk AYHAN, Murat KOCA

Kumarin Türevli Kopolimerlerin Sentezi ve Karakterizasyonu

Mevcut çalışmada, kumarin türevli yeni bir monomer olan 3-benzoil kumarin-7-il-metakrilat (BKMA) monomerinin metil metakrilat (MMA) ile farklı bileşimlerde bir seri kopolimeri hazırlandı. Bu amaçla serbest radikal polimerizasyon yöntemi kullanıldı. Spektral karakterizasyonlar FTIR ve 1H-NMR teknikleri ile başarıldı. Kopolimer sistemlerinin bileşimleri 1H-NMR spektrumlarından belirlendi. DSC analizinden kopolimer bileşimindeki BKMA oranı %23 seviyesine düştüğünde camsı geçiş sıcaklığında 179 oC’den 165 oC’ye bir azalış görüldü. Poli(BKMA) homopolimeri ve %54 BKMA bileşimli kopolimerin TGA analizinde her iki polimer için başlangıç bozunma sıcaklıkları sırasıyla 321 oC ve 311 oC olarak kaydedildi.

Anahtar Kelimeler:

kumarin türevli kopolimer, sentez, karakterizasyon, termal özellikler

Synthesis and Characterization of Coumarin Derived Copolymers

In present study, a copolymer series of a new coumarin derived monomer 3-benzoyl coumarin-7-yl-methacrylate (BKMA) monomer with methyl methacrylate (MMA) at different compositions was prepared. For this purpose, free radical polymerization method was used. Spectral characterizations were performed by FTIR and 1H-NMR techniques. Copolymer compositions were determined with 1H-NMR spectra. From DSC analysis, the glass transition temperature of copolymers was decreased from 179 oC to 165 oC when the level of BKMA ratio decreased to 23% level. In TGA analysis of poly(BKMA) homopolymer and the copolymer with 54% BKMA ratio, the initial decomposition temperatures of both polymers were recorded to be 321 oC and 311 oC, respectively.

Keywords:

coumarin derived copolymer, synthesis, characterization, thermal properties,

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