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Thermal properties of amphiphilic biodegradable triblock copolymer of l,l-lactide and ethylene glycol

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Abstract

Samples of poly(l,l-lactide)-block-poly(ethylene glycol)-block-poly(l,l-lactide) (PLLA-PEG-PLLA) were synthesized from l,l-lactide polymerization using stannous 2-ethylhexanoate, Sn(Oct)2 as initiator and di-hydroxy-terminated poly(ethylene glycol) (PEG) (M n  = 4000 g mol−1) as co-initiator. The chemical linkage between the PEG segment and the PLA segments was characterized by Fourier transform infrared spectroscopy (FTIR). Thermogravimetry analysis (TG) revealed the copolymers composition and was capable to show the deleterious effect of an excess of Sn(Oct)2 in the polymer thermal stability, while Differential Scanning Calorimetry (DSC) allowed the observation of the miscibility between the PLLA and PEG segments in the different copolymers.

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Acknowledgements

The authors thank Brazilian agencies CAPES, CNPq, and FAPESP for their financial support.

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Authors and Affiliations

  1. Department of Organic Process, School of Chemistry, Federal University of Rio de Janeiro, 21941-598, Rio de Janeiro, Brazil

    C. G. Mothé & A. D. Azevedo

  2. Department of Metallurgical and Materials Engineering, Polytechnic School, University of São Paulo, 05508-900, Sao Paulo, Brazil

    W. S. Drumond & S. H. Wang

Authors
  1. C. G. Mothé
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  2. A. D. Azevedo
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  3. W. S. Drumond
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  4. S. H. Wang
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Correspondence to C. G. Mothé.

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Mothé, C.G., Azevedo, A.D., Drumond, W.S. et al. Thermal properties of amphiphilic biodegradable triblock copolymer of l,l-lactide and ethylene glycol. J Therm Anal Calorim 101, 229–233 (2010). https://doi.org/10.1007/s10973-009-0589-z

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  • DOI: https://doi.org/10.1007/s10973-009-0589-z

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