Polymerization of ε-caprolactone with degraded PET for its functionalization

  • Karina Espinoza-García
  • Angel Marcos-Fernández
  • Rodrigo Navarro
  • Aurelio Ramírez-HernándezEmail author
  • Jose Eduardo Báez-García
  • Gustavo Rangel-Porras


Poly(caprolactone) (PCL) was synthesized from the polymerization of ε-caprolactone (CL) with degraded poly(ethylene terephthalate) (PET) for its functionalization using heptamolybdate of ammonium and tin(II) 2-ethylhexanoate, as catalyst and initiator, respectively. Polymerization of CL with bis(2-hydroxyethyl) terephthalate (BHET) was carried out to make a comparison. From the analysis by FTIR, the functional groups of polycaprolactone and degraded PET were identified by FTIR. The chemical shift at 165.59 ppm obtained by NMR corresponded to the chemical bond between the carbonyl of the PCL bound to the -CH2CO2-C10H8O4 of the degraded PET. The number average molar mass of polymer obtained was determined and its chemical structure was proposed. Crystallinity and the temperatures of melting and degradation depended of the mass of degraded PET used in the synthesis. Based on the proposed chemical structure, the synthesized polymer could be used in the preparation of other polymers.


Degraded PET PCL Synthesis Catalyst Characterization 



We are grateful to Universidad del Papaloapan and Martha Rocio Valencia Estacio, for their assistance on this article.

Supplementary material

10965_2019_1821_MOESM1_ESM.docx (511 kb)
ESM 1 (DOCX 510 kb)


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Copyright information

© The Polymer Society, Taipei 2019

Authors and Affiliations

  • Karina Espinoza-García
    • 1
  • Angel Marcos-Fernández
    • 2
  • Rodrigo Navarro
    • 2
  • Aurelio Ramírez-Hernández
    • 1
    Email author
  • Jose Eduardo Báez-García
    • 3
  • Gustavo Rangel-Porras
    • 3
  1. 1.Departamento de QuímicaUniversidad del PapaloapanOaxacaMéxico
  2. 2.Instituto de Ciencia y Tecnología de Polímeros (ICTP)MadridEspaña
  3. 3.División de Ciencias Exactas Departamento de QuímicaUniversidad de GuanajuatoGuanajuatoMéxico

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