Abstract
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 1H 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 ~9%). Thermal, mechanical and morphological characterization of the blends were also conducted.
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Acknowledgments
This work was financially supported by TUBITAK and Zonguldak Karaelmas University Research Fund. The Authors thank to Manolya Kukut (in Yusuf Yagci research group) and Amitav Sanyal (Bosphorus University, İstanbul) for GPC analysis of the Polymers; and to Gülden Albuz (Cilas Kauçuk A.Ş. Devrek, Zonguldak, Turkey) for stres-strain measurements.
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Hazer, B., Baysal, B.M., Köseoğlu, A.G. et al. Synthesis of Polylactide-b-Poly (Dimethyl Siloxane) Block Copolymers and Their Blends with Pure Polylactide. J Polym Environ 20, 477–484 (2012). https://doi.org/10.1007/s10924-011-0406-1
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DOI: https://doi.org/10.1007/s10924-011-0406-1