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Low-Density Polybutylene Terephthalate Foams with Enhanced Compressive Strength via a Reactive-Extrusion Process

Title data

Aksit, Merve ; Gröschel, Sebastian ; Kuhn, Ute ; Aksit, Alper ; Kreger, Klaus ; Schmidt, Hans-Werner ; Altstädt, Volker:
Low-Density Polybutylene Terephthalate Foams with Enhanced Compressive Strength via a Reactive-Extrusion Process.
In: Polymers. Vol. 12 (2020) Issue 9 . - 2021.
ISSN 2073-4360
DOI: https://doi.org/10.3390/polym12092021

Official URL: Volltext

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Abstract in another language

Due to their appealing properties such as high-temperature dimensional stability, chemical resistance, compressive strength and recyclability, new-generation foams based on engineering thermoplastics such as polyethylene terephthalate (PET) and polybutylene terephthalate (PBT) have been gaining significant attention. Achieving low-density foams without sacrificing the mechanical properties is of vital importance for applications in the field of transportation and construction, where sufficient compressive strength is desired. In contrast to numerous research studies on PET foams, only a limited number of studies on PBT foams and in particular, on extruded PBT foams are known. Here we present a novel route to extruded PBT foams with densities as low as 80 kg/m3 and simultaneously with improved compressive properties manufactured by a tandem reactive-extrusion process. Improved rheological properties and therefore process stability were achieved using two selected 1,3,5-benzene-trisamides (BTA1 and BTA2), which are able to form supramolecular nanofibers in the PBT melt upon cooling. With only 0.08 wt of BTA1 and 0.02 wt of BTA2 the normalized compressive strength was increased by 28 and 15, respectively. This improvement is assigned to the intrinsic reinforcing effect of BTA fibers in the cell walls and struts.

Further data

Item Type: Article in a journal
Refereed: Yes
Keywords: foams; polybutylene terephthalate; foam extrusion; reactive-extrusion; supramolecular additives; 1,3,5-benzene-trisamides; cell nucleation; foam morphology; compressive strength
Institutions of the University: Faculties
Faculties > Faculty of Biology, Chemistry and Earth Sciences
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Chair Macromolecular Chemistry I
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Chair Macromolecular Chemistry I > Chair Macromolecular Chemistry I - Univ.-Prof. Dr. Hans-Werner Schmidt
Faculties > Faculty of Engineering Science
Faculties > Faculty of Engineering Science > Former Professors
Faculties > Faculty of Engineering Science > Chair Polymer Materials
Faculties > Faculty of Engineering Science > Former Professors > Chair Polymer Materials - Univ.-Prof. Dr.-Ing. Volker Altstädt
Profile Fields > Advanced Fields > Polymer and Colloid Science
Profile Fields > Advanced Fields > Advanced Materials
Profile Fields > Emerging Fields > Energy Research and Energy Technology
Research Institutions
Research Institutions > Central research institutes
Research Institutions > Central research institutes > Bayreuth Institute of Macromolecular Research - BIMF
Research Institutions > Affiliated Institutes
Research Institutions > Affiliated Institutes > Bavarian Polymer Institute (BPI)
Profile Fields
Profile Fields > Advanced Fields
Profile Fields > Emerging Fields
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Chair Polymer Materials for Electrochemical Storage > Chair Polymer Materials for Electrochemical Storage - Univ.-Prof. Dr. André Gröschel
Result of work at the UBT: Yes
DDC Subjects: 500 Science
500 Science > 540 Chemistry
600 Technology, medicine, applied sciences > 620 Engineering
600 Technology, medicine, applied sciences > 660 Chemical engineering
Date Deposited: 09 Nov 2020 09:16
Last Modified: 02 Aug 2023 07:53
URI: https://eref.uni-bayreuth.de/id/eprint/59293