Bio-based aliphatic/aromatic poly(trimethylene furanoate/sebacate) random copolymers: Correlation between mechanical, gas barrier performances and compostability and copolymer composition

Agata Zubkiewicz, Anna Szymczyk, Rafaël J. Sablong, Michelina Soccio, Giulia Guidotti, Valentina Siracusa, Nadia Lotti (Corresponding author)

Research output: Contribution to journalArticleAcademicpeer-review

6 Citations (Scopus)

Abstract

Highly promising fully biobased random copolyesters, poly(trimethylene 2,5-furandicarboxylate-co-trimethylene sebacate) (PTFcoPTSeb), were synthesized by using bio derived 1,3-propanediol, dimethyl ester of 2,5- furandicarboxylic acid, and sebacic acid, through eco-friendly polycondensation in the melt. Copolymers with high molecular weight containing 5, 15, 25 mol % of PTSeb were obtained, and their chemical structure confirmed by 1H NMR and FTIR spectroscopy. The thermal, tensile and gas barrier properties and composability were studied in relation to the copolymer supramolecular structure. As expected, introduction of PTSeb co-units results in lowering of glass transition temperature of copolymers and improves their flexibility. Besides, all copolymers showed outstanding gas barrier properties to O2 and CO2, with copolymer containing 15 mol % of PTSeb showing exceptional gas barrier properties, better than those of PTF and comparable to those of EVOH, currently used in multilayer packaging films. The same copolymer exhibited temperature induced shape memory behaviour. It was found that low amounts (15-25 mol %) of PTSeb in copolymer significantly modifies PTF thermal, mechanical and barrier properties and renders the final material compostable. Copolyesters containing 15 and 25 mol % of PTSeb can compete in some applications with commercially available compostable Ecoflex® polymer, but with markedly improved barrier properties.

Original languageEnglish
Article number109800
Number of pages16
JournalPolymer Degradation and Stability
Volume195
DOIs
Publication statusPublished - Jan 2022

Bibliographical note

Funding Information:
This publication is based upon work from COST Action FUR4Sustain, CA18220, supported by COST (European Cooperation in Science and Technology). The authors thank Dr. Massimo Gazzano for his cooperation in the acquisition of SEM micrographs.

Keywords

  • Barrier properties
  • Biobased copolyesters
  • Composability
  • Mechanical properties
  • Poly(trimethylene 2,5-furanoate)

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