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Dominici F, Gigli M, Armentano I, et al. Improving the flexibility and compostability of starch/poly(butylene cyclohexanedicarboxylate)-based blends. Carbohydr Polym. 2020;246:116631doi: 10.1016/j.carbpol.2020.116631.
Dominici, F., Gigli, M., Armentano, I., Genovese, L., Luzi, F., Torre, L., Munari, A., & Lotti, N. (2020). Improving the flexibility and compostability of starch/poly(butylene cyclohexanedicarboxylate)-based blends. Carbohydrate polymers, 246116631. https://doi.org/10.1016/j.carbpol.2020.116631
Dominici, Franco, et al. "Improving the flexibility and compostability of starch/poly(butylene cyclohexanedicarboxylate)-based blends." Carbohydrate polymers vol. 246 (2020): 116631. doi: https://doi.org/10.1016/j.carbpol.2020.116631
Dominici F, Gigli M, Armentano I, Genovese L, Luzi F, Torre L, Munari A, Lotti N. Improving the flexibility and compostability of starch/poly(butylene cyclohexanedicarboxylate)-based blends. Carbohydr Polym. 2020 Oct 15;246:116631. doi: 10.1016/j.carbpol.2020.116631. Epub 2020 Jun 15. PMID: 32747266.
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Carbohydr Polym. 2020 Oct 15;246:116631. doi: 10.1016/j.carbpol.2020.116631. Epub 2020 Jun 15.

Improving the flexibility and compostability of starch/poly(butylene cyclohexanedicarboxylate)-based blends.

Carbohydrate polymers

Franco Dominici, Matteo Gigli, Ilaria Armentano, Laura Genovese, Francesca Luzi, Luigi Torre, Andrea Munari, Nadia Lotti

Affiliations

  1. Civil and Environmental Engineering Department, University of Perugia, UdR INSTM, Terni Italy.
  2. Department of Molecular Sciences and Nanosystems, Ca'Foscari University of Venice, Venice Italy. Electronic address: [email protected].
  3. Department of Economics, Engineering, Society and Business Organization (DEIm), University of Tuscia, Viterbo Italy.
  4. Civil, Chemical, Environmental and Materials Engineering Department, University of Bologna, Bologna Italy.
  5. Civil, Chemical, Environmental and Materials Engineering Department, University of Bologna, Bologna Italy. Electronic address: [email protected].

PMID: 32747266 DOI: 10.1016/j.carbpol.2020.116631

Abstract

Fully biobased blends of thermoplastic starch and a poly(butylene cyclohexanedicarboxylate)-based random copolyester containing 25 % of adipic acid co-units (PBCEA) are prepared by melt blending and direct extrusion film casting. The obtained films are characterized from the physicochemical and mechanical point of view and their fragmentation under composting conditions is evaluated. The results demonstrate that the introduction of adipic acid co-units in the PBCE macromolecular chains permits to decrease the blending temperature, thus avoiding unwanted starch degradation reactions. Moreover, the presence of small amounts of citric acid as compatibilizer further improves the interfacial adhesion between the two components and promotes the formation of micro-porosities within the films. The synergistic combination of these factors leads to the development of materials showing an elastomeric behavior, i.e. no evident yield and elongation at break higher than 450 %, good moisture resistance and fast fragmentation in compost.

Copyright © 2020 Elsevier Ltd. All rights reserved.

Keywords: Biobased polymer blends; Compatibilization; Elastomeric behavior; Poly(butylene cyclohexanedicarboxylate); Thermoplastic starch (TPS)

Conflict of interest statement

Declaration of Competing Interest The authors declare no conflict of interest.

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