Yayın: Synthesis of some novel blends of polylactide with polylactide-b-poly (ethylene glycol) block copolymers
Dosyalar
Tarih
Kurum Yazarları
Taşkın, Elif
Beşirli, Necati
Yazarlar
Hazer, Baki
Çavuş, Gökhan
Danışman
Dil
Türü
Yayıncı:
Taylor & Francis
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Özet
The synthesis of polylactide (PLA)-b-polyethylene glycol (PEG) linear block copolymers and their use in blends with pure-PLA is described. PLA-b-PEG linear block copolymers were obtained by the reaction between poly(ethylene glycol) bis (2-aminopropyl ether) (molecular weight 2000 Dalton) with PLA in the presence of stannous octoate via trans esterification. Molecular weight measurements of the block copolymers indicated that AB and ABA type block copolymers were obtained by controlling the feed ratio in the trans esterification reactions. The copolymers obtained were purified by the fractional precipitation and then characterized by H-1-NMR, FTIR, GPC and DSC techniques. Blends of pure PLA with PLA-b-PEG displayed improved mechanical properties compared to pure PLA. Thermal, mechanical and morphological characterization of the blends were also conducted.
Açıklama
Kaynak:
Anahtar Kelimeler:
Konusu
Polymer science, Polylactide, Block copolymers, Poly(ethylene glycol), Ring-opening polymerization, Methyl-methacrylate, Epsilon-caprolactone, Graft-copolymers, Thermoplastic elastomers, Diblock copolymers, Mechanical-properties, Renewable resources, Triblock copolymers, Drug-delivery, Esterification, Esters, Ethers, Ethylene, Glycols, Mechanical properties, Molecular weight, Polyethylene oxides, Synthesis (chemical), Feed ratios, Fractional precipitation, Ftır, Linear block copolymers, Molecular weight measurements, Morphological characterization, Polylactides, Stannous octoate, Polyethylene glycols
Alıntı
Taşkın, E. vd. (2012). "Synthesis of some novel blends of polylactide with polylactide-b-poly (ethylene glycol) block copolymers". Journal of Macromolecular Science Part A-Pure and Applied Chemistry, 49(2), 164-170.