Comprehensive study of the thermo-reversibility of Diels–Alder based PCL polymer networks

Comprehensive study of the thermo-reversibility of Diels–Alder based PCL polymer networks Chemical crosslinking is an efficient tool to improve or impart new properties to conventional polymers. Especially, crosslinking imparts remarkable shape–memory properties to poly-ε-caprolactone (PCL) materials. Nevertheless, the processing of networks is often tricky due to infusibility and insolubility of cross-linked chains. Therefore, the synthesis of PCL networks including thermo-reversible crosslinks based on (retro)-Diels-Alder (DA) reaction were developed to allow preserving the melt-processing while keeping the required mechanical properties below the melting point. This paper aims at studying in depth, such thermo-dependent network formation and stability. Besides conventional swelling experiments, Raman spectroscopy was revealed as a powerful tool to follow the formation of the DA adduct during the crosslinking. In combination with rheological measurements, we were able to determine the most appropriate temperatures to form the network (DA crosslinking) and to process it (retro-DA reaction) without degradation of the material. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Polymer Elsevier

Comprehensive study of the thermo-reversibility of Diels–Alder based PCL polymer networks

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Publisher
Elsevier
Copyright
Copyright © 2015 Elsevier Ltd
ISSN
0032-3861
D.O.I.
10.1016/j.polymer.2015.11.055
Publisher site
See Article on Publisher Site

Abstract

Chemical crosslinking is an efficient tool to improve or impart new properties to conventional polymers. Especially, crosslinking imparts remarkable shape–memory properties to poly-ε-caprolactone (PCL) materials. Nevertheless, the processing of networks is often tricky due to infusibility and insolubility of cross-linked chains. Therefore, the synthesis of PCL networks including thermo-reversible crosslinks based on (retro)-Diels-Alder (DA) reaction were developed to allow preserving the melt-processing while keeping the required mechanical properties below the melting point. This paper aims at studying in depth, such thermo-dependent network formation and stability. Besides conventional swelling experiments, Raman spectroscopy was revealed as a powerful tool to follow the formation of the DA adduct during the crosslinking. In combination with rheological measurements, we were able to determine the most appropriate temperatures to form the network (DA crosslinking) and to process it (retro-DA reaction) without degradation of the material.

Journal

PolymerElsevier

Published: Feb 10, 2016

References

  • Macromol. Chem. Phys.
    Defize, T.; Riva, R.; Jérôme, C.; Alexandre, M.
  • Macromolecules
    Sheridan, R.J.; Bowman, C.N.
  • J. Mol. Struct.
    Aguiar, E.C.; da Silva, J.B.P.; Ramos, M.N.

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