SYNTHESIS AND NMR ANALYSIS OF THE STRUCTURE AND COMPOSITION OF TRIBLOCK POLY(ESTER-SILOXANE-ESTER) COPOLYMER BASED ON L-LACTIDE

Authors

  • Milica Balaban University of Banja Luka, Faculty of Natural Sciences and Mathematics, Mladena Stojanovića 2, Banja Luka, Republic of Srpska
  • Nataša Sladojević University of Banja Luka, Faculty of Natural Sciences and Mathematics, Mladena Stojanovića 2, Banja Luka, Republic of Srpska
  • Vesna Antić University of Belgrade, Faculty of Agriculture, Nemanjina 6, Belgrade, Serbia

DOI:

https://doi.org/10.7251/cm.v1i8.4396

Abstract

The synthesis, structure and composition of triblock poly(ester-siloxane-ester) copolymers, PLLA-PDMS-PLLA, based on α,ω–diaminopropyl-poly(dimethyl siloxane) (PDMS) and L-lactide were studied in this work. The samples of the controlled block length were synthesized by ring-opening polymerization of L-lactide in the presence of stannous octoate, Sn(Oct)2, as a catalyst, and aminopropyl-terminated siloxane prepolymer, as a macroinitiator, in a concentrated toluene solution. Influence of temperature and concentration of the catalyst on the structure, composition and size of the copolymers were investigated by 1H and 13C NMR spectroscopy and dilute solution viscometry.

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Published

2018-02-12