JOURNAL OF CHILEAN CHEMICAL SOCIETY

Vol 61 No 1 (2016): Journal of the Chilean Chemical Society
Original Research Papers

BRANCHED POLYESTERS FROM GERMYLATED AND FATTY COMPOUNDS

Nadia Katir
Laboratoire d’Hétérochimie Fondamentale et Appliquée, UMR-CNRS 5069, Université Paul Sabatier, 118 Route de Narbonne, 31062 Toulouse cedex 9 (iNANOTECH) Institute of Nanomaterials and Nanotechnology – MAScIR (Moroccan Foundation for Advanced Science, Innovation and Research), ENSET, Avenue de l’Armée Royale, Madinat El Irfane, 10100 Rabat, Morocco
Daniela Andrade
Departamento de Química Orgánica, Facultad de Ciencias Químicas, Universidad de Concepción, Casilla 160-C, Concepción. E-mail adress: mdahrouch@udec.cl, telephone: 56-412204258, fax numbers:56-412245974
Mohamed Dahrouch
Departamento de Química Orgánica, Facultad de Ciencias Químicas, Universidad de Concepción, Casilla 160-C, Concepción. E-mail adress: mdahrouch@udec.cl, telephone: 56-412204258, fax numbers:56-412245974
Enzo Díaz
Departamento de Química Orgánica, Facultad de Ciencias Químicas, Universidad de Concepción, Casilla 160-C, Concepción. E-mail adress: mdahrouch@udec.cl, telephone: 56-412204258, fax numbers:56-412245974
Nicolas Gatica
Departamento de Polímeros, Facultad de Ciencias Químicas, Universidad de Concepción, Casilla 160-C, Concepción
Djamila Hourlier
Institut d’Electronique, de Microélectronique et de Nanotechnologie IEMN UMR 8520 Avenue Henri Poincare BP 60069 F-59652 Villeneuve d’Ascq Cedex
Nazmy Reyes
Departamento de Química Orgánica, Facultad de Ciencias Químicas, Universidad de Concepción, Casilla 160-C, Concepción. E-mail adress: mdahrouch@udec.cl, telephone: 56-412204258, fax numbers:56-412245974
Miguel Zarraga
Departamento de Química Orgánica, Facultad de Ciencias Químicas, Universidad de Concepción, Casilla 160-C, Concepción. E-mail adress: mdahrouch@udec.cl, telephone: 56-412204258, fax numbers:56-412245974
Published December 10, 2015
Keywords
  • Polymer synthesis,
  • Thermal properties,
  • Branched biopolyesters,
  • Fatty compounds,
  • Germanium compounds

Abstract

Here we report the synthesis of news branched polyesters derived from the trans-esterification reactions at moderate temperatures (140-190°C), either from polyglycols with different molecular weights and monomers such as germylated fatty tri-esters, or from dimethyl terephtalate and germylated fatty tri-alcohol. The structure of the resulting polymers was determined by elemental analysis, FTIR, and 13C CP MAS NMR, and their thermal properties by thermogravimetry analysis and differential scanning calorimetry. 13C CP MAS NMR analysis indicates that the characteristic signals due to the methoxy groups of the germylated fatty tri-ester and the CH2OH group of germylated fatty tri-alcohol completely disappeared. This suggests that the trans-esterification process reached a nearly complete conversion. All germylated branched polyesters are insoluble in classic organic solvents due to their polydimensional structure. Thermal properties of these new materials showed that they do not present any cristallinity phase, and undergo thermal decomposition above 300°C.

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