Fully Recyclable Metastable Polymers and Composites

Evan M. Lloyd, Hector Lopez Hernandez, Adam M. Feinberg, Mostafa Yourdkhani, Edwin K. Zen, Edgar B. Mejia, Nancy R. Sottos, Jeffrey S. Moore, Scott R. White

Research output: Contribution to journalArticle

Abstract

Fully-cycled depolymerization and repolymerization of a low ceiling temperature polymer, cyclic poly(phthalaldehyde) (cPPA), yielding high performance structural polymer is demonstrated. The facile conditions for cPPA depolymerization circumvent the extreme conditions required to break down and recycle traditional thermoplastics and thermosets. cPPA depolymerizes in as little as 14 min at 120 °C, with concurrent evaporation and quantitative recovery of the monomer. Polymerization of the recovered monomer produces cPPA with molecular and mechanical properties identical to the original material. Depolymerization of cPPA is also demonstrated in the presence of various carbon fiber reinforcements. Continuous carbon fibers retain 100% of their moduli and tensile strength through multiple generations of recycling, while fully recycled cPPA/carbon nanofiber composites exhibit mechanical properties equivalent to the original composite and show no degradation with cycling.

Original languageEnglish (US)
Pages (from-to)398-406
Number of pages9
JournalChemistry of Materials
Volume31
Issue number2
DOIs
StatePublished - Jan 22 2019

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Depolymerization
Polymers
Carbon fibers
Composite materials
Monomers
Mechanical properties
Carbon nanofibers
Thermosets
Ceilings
Fiber reinforced materials
Thermoplastics
Recycling
Evaporation
Tensile strength
Polymerization
Recovery
Degradation
Temperature
carbon fiber

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)
  • Materials Chemistry

Cite this

Lloyd, E. M., Lopez Hernandez, H., Feinberg, A. M., Yourdkhani, M., Zen, E. K., Mejia, E. B., ... White, S. R. (2019). Fully Recyclable Metastable Polymers and Composites. Chemistry of Materials, 31(2), 398-406. https://doi.org/10.1021/acs.chemmater.8b03585

Fully Recyclable Metastable Polymers and Composites. / Lloyd, Evan M.; Lopez Hernandez, Hector; Feinberg, Adam M.; Yourdkhani, Mostafa; Zen, Edwin K.; Mejia, Edgar B.; Sottos, Nancy R.; Moore, Jeffrey S.; White, Scott R.

In: Chemistry of Materials, Vol. 31, No. 2, 22.01.2019, p. 398-406.

Research output: Contribution to journalArticle

Lloyd, EM, Lopez Hernandez, H, Feinberg, AM, Yourdkhani, M, Zen, EK, Mejia, EB, Sottos, NR, Moore, JS & White, SR 2019, 'Fully Recyclable Metastable Polymers and Composites', Chemistry of Materials, vol. 31, no. 2, pp. 398-406. https://doi.org/10.1021/acs.chemmater.8b03585
Lloyd EM, Lopez Hernandez H, Feinberg AM, Yourdkhani M, Zen EK, Mejia EB et al. Fully Recyclable Metastable Polymers and Composites. Chemistry of Materials. 2019 Jan 22;31(2):398-406. https://doi.org/10.1021/acs.chemmater.8b03585
Lloyd, Evan M. ; Lopez Hernandez, Hector ; Feinberg, Adam M. ; Yourdkhani, Mostafa ; Zen, Edwin K. ; Mejia, Edgar B. ; Sottos, Nancy R. ; Moore, Jeffrey S. ; White, Scott R. / Fully Recyclable Metastable Polymers and Composites. In: Chemistry of Materials. 2019 ; Vol. 31, No. 2. pp. 398-406.
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