Yayın: Synthesis of polylactide-b-poly (dimethyl siloxane) block copolymers and their blends with pure polylactide
Tarih
Kurum Yazarları
Beşirli, Necati
Taşkın, Elif
Yazarlar
Hazer, Baki
Baysal, Bahattin M.
Koseoğlu, Ayşe G.
Danışman
Dil
Türü
Yayıncı:
Springer
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Özet
The synthesis of polylactide (PLA)-b-poly (dimethyl siloxane) (PDMS) linear block copolymers and their use in blends with pure-PLA are described. PLA-b-PDMS linear block copolymers were obtained by the transesterification reaction in chloroform solution between poly(dimethyl siloxane) bis (2-aminopropyl ether) (molecular weight 2,000 Da) with PLA in the presence of stannous octoate. Molecular weights (Mw) of the block copolymers were varied from 53,800 to 63,600 Da while that of pristine PLA was 73,600 Da. The copolymers obtained were purified by fractional precipitation and then characterized by H-1 NMR, FTIR, GPC, viscometry and DSC techniques. Blends of pure PLA with PLA-b-PDMS block copolymers displayed improved elastic properties (elongation up to 140%) compared to pure PLA (elongation similar to 9%). Thermal, mechanical and morphological characterization of the blends were also conducted.
Açıklama
Kaynak:
Anahtar Kelimeler:
Konusu
Engineering, Polymer science, Poly(lactide), Transesterification, Poly(dimethyl siloxane), Block copolymer, Blends of polymers, Ring-opening polymerization, Epsilon-caprolactone, Methyl-methacrylate, Renewable resources, Triblock copolymers, Graft-copolymers, L-lactide, Degradation, Poly(epsilon-caprolactone), Crystallization, Chlorine compounds, Microchannels, Molecular weight, Polyesters, Chloroform solutions, Elastic properties, Fractional precipitation, Linear block copolymers, Morphological characterization, Poly lactide, Polydimethylsiloxane pdms, Transesterification reaction, Chemical analysis, Chloroform, Elastic property, Polymer, Precipitation (chemistry), Block copolymers
Alıntı
Hazer, B. vd. (2012). "Synthesis of polylactide-b-poly (dimethyl siloxane) block copolymers and their blends with pure polylactide". Journal of Polymers and the Environment, 20(2), 477-484.