Journal of Polymers and the Environment

, Volume 20, Issue 2, pp 477–484

Synthesis of Polylactide-b-Poly (Dimethyl Siloxane) Block Copolymers and Their Blends with Pure Polylactide


    • Department of ChemistryZonguldak Karaelmas University
  • Bahattin M. Baysal
    • Department of Chemical EngineeringBoğazici University
  • Ayşe G. Köseoğlu
    • Department of ChemistryZonguldak Karaelmas University
  • Necati Beşirli
    • Department of ChemistryUludağ University
  • Elif Taşkın
    • Department of ChemistryUludağ University
Original Paper

DOI: 10.1007/s10924-011-0406-1

Cite this article as:
Hazer, B., Baysal, B.M., Köseoğlu, A.G. et al. J Polym Environ (2012) 20: 477. doi:10.1007/s10924-011-0406-1


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.


Poly(lactide)Poly(dimethyl siloxane)Block copolymerTransesterificationBlends of polymers

Copyright information

© Springer Science+Business Media, LLC 2011