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Polymer Bulletin
Erschienen in: Polymer Bulletin 6/2013

01.06.2013 | Original Paper

Synthesis and properties of novel star-shaped polyesters based on l-lactide and castor oil

verfasst von: Ivan S. Ristić, Milena Marinović-Cincović, Suzana M. Cakić, Ljiljana M. Tanasić, Jaroslava K. Budinski-Simendić

Erschienen in: Polymer Bulletin | Ausgabe 6/2013

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Abstract

The topology of biodegradable polyesters can be adjusted by incorporating multifunctional polyols into the polyester backbone to obtain branched polymers. The aim of this study was to prepare the biodegradable-branched polyester polyols based on l-lactide and castor oil using the trifluoromethanesulfonic acid as a catalyst. FTIR and 1H NMR spectroscopy measurements were used to estimate the molecular structure of the novel materials. The polyester polyol was synthesized by ‘‘core-first” method which involves a polymerization of l-lactide by using a castor oil as multifunctional initiator. Molar masses estimated by gel permeation chromatography and vapor pressure osmometry were in good correlation with calculated values based on hydroxyl number of obtained polymers. DSC measurements confirmed high crystallinity degree of the synthesized material. It was assessed that the molar masses of obtained polymers-influenced glass transition temperature significantly. The thermal stability was investigated by TG analysis, and the results have shown the dependence of weight loss on the arm length of the star-shaped polyesters. The thermal stability of star-shaped polyesters significantly decreased with degradation of polyester polyol obtained in acid solution.
Nächster Artikel Synthesis and solubility of polylactide-co-poly(amino acid) random copolymer

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Metadaten
Titel
Synthesis and properties of novel star-shaped polyesters based on l-lactide and castor oil
verfasst von
Ivan S. Ristić
Milena Marinović-Cincović
Suzana M. Cakić
Ljiljana M. Tanasić
Jaroslava K. Budinski-Simendić
Publikationsdatum
01.06.2013
Verlag
Springer-Verlag
Erschienen in
Polymer Bulletin / Ausgabe 6/2013
Print ISSN: 0170-0839
Elektronische ISSN: 1436-2449
DOI
https://doi.org/10.1007/s00289-013-0917-0

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