Partially Bio-Based Polyester Bead Foams via Extrusion Foaming of Poly(Butylene Terephthalate)/Poly(Butylene Furanoate) Blends

Publikation: Beitrag in FachzeitschriftForschungsartikelBeigetragenBegutachtung


  • Christian Mielke - , Professur für Organische Chemie der Polymere (gB/IPF) (MTC3), Leibniz Institute of Polymer Research Dresden (Autor:in)
  • Doris Pospiech - , Leibniz Institute of Polymer Research Dresden (Autor:in)
  • Justus Kuhnigk - , Universität Bayreuth (Autor:in)
  • Andreas Korwitz - , Leibniz Institute of Polymer Research Dresden (Autor:in)
  • Hartmut Komber - , Leibniz Institute of Polymer Research Dresden (Autor:in)
  • Rico Bernhardt - , Leibniz Institute of Polymer Research Dresden (Autor:in)
  • Nico Krebs - , Universität Bayreuth (Autor:in)
  • Regine Boldt - , Leibniz Institute of Polymer Research Dresden (Autor:in)
  • Holger Ruckdaeschel - , Universität Bayreuth (Autor:in)
  • Brigitte Voit - , Professur für Organische Chemie der Polymere (gB/IPF) (MTC3), Leibniz Institute of Polymer Research Dresden, Technische Universität Dresden (Autor:in)


The interest in bio-based alternatives to classical polyesters such as poly(ethylene terephthalate) (PET) and poly(butylene terephthalate) (PBT) is steadily growing to achieve a more sustainable approach to polymer materials. In this study, PBT/poly(butylene furanoate) (PBF) blends are prepared, characterized and extrusion foamed. PBF as a bio-based polyester offers two advantages. The ecological footprint of the material is reduced, and additionally, it can be used in Diels-Alder reactions at the blend surface to support fusion of the foamed beads. The blending behavior of the polyesters is investigated using samples prepared in a microcompounder, particularly focused on the miscibility of the blends and transesterification reactions. The blends are thermodynamically immiscible but show a certain degree of transesterification according to nuclear magnetic resonance (NMR) spectroscopy. The morphology of blend beads produced by an extrusion foaming process is analyzed regarding their cell density, cell size distribution, and open-cell content. It is shown that PBF has a positive effect on the bead foam morphology. The use of a bifunctional linker designed for chemical fusion of the bead surfaces allows to obtaining of molded parts, in contrast to beads containing pure PBT.Poly(butylene terephthalate) (PBT)/poly(butylene furanoate) (PBF) blend bead foams produced by continuous extrusion foaming with supercritical carbondioxide are reported. PBF acts as biobased additive and improves the foam properties (pore size distribution, cell density, average pore size, open-cell content). Chemical fusion using the furan functionalities is successfully performed by coating the beads with a Diels-Alder linker.image


FachzeitschriftMacromolecular materials and engineering
Frühes Online-DatumSept. 2023
PublikationsstatusVeröffentlicht - Okt. 2023

Externe IDs

Scopus 85169894241
ORCID /0000-0002-4531-691X/work/148608016
Mendeley 650d4a4e-a347-3928-ac9d-9936c3c4afb3



  • Pbf, pbt, Blends, Extrusion foaming, Poly(butylene furanoate), Poly(butylene terephthalate), Polyesters, PBF, PBT, blends, extrusion foaming, poly(butylene furanoate), poly(butylene terephthalate), polyesters