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Polymerization of ε-caprolactone with degraded PET for its functionalization

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Abstract

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.

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Acknowledgements

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

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Author notes

  1. Aurelio Ramírez-Hernández

    Present address: Departamento de Química, Universidad del Papaloapan, Circuito Central 200, C.P. 68301, Tuxtepec, Oaxaca, México

Authors and Affiliations

  1. Departamento de Química, Universidad del Papaloapan, Circuito Central 200, C.P. 68301, Tuxtepec, Oaxaca, México

    Karina Espinoza-García

  2. Instituto de Ciencia y Tecnología de Polímeros (ICTP), C/Juan de la Cierva 3, 28006, Madrid, España

    Angel Marcos-Fernández & Rodrigo Navarro

  3. División de Ciencias Exactas Departamento de Química, Universidad de Guanajuato, Noria Alta S/N, C.P. 36050. Guanajuato, Guanajuato, México

    Jose Eduardo Báez-García & Gustavo Rangel-Porras

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  1. Karina Espinoza-García
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  2. Angel Marcos-Fernández
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Correspondence to Aurelio Ramírez-Hernández.

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Espinoza-García, K., Marcos-Fernández, A., Navarro, R. et al. Polymerization of ε-caprolactone with degraded PET for its functionalization. J Polym Res 26, 180 (2019). https://doi.org/10.1007/s10965-019-1821-6

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