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URN to cite this document: urn:nbn:de:bvb:703-epub-8330-6
Title data
Himmelsbach, Andreas ; Standau, Tobias ; Kuhnigk, Justus ; Bubmann, Tobias ; Akdevelioglu, Yavuz ; Nofar, Mohammadreza ; Ruckdäschel, Holger:
Investigation of the Reaction Kinetics of Poly(butylene terephthalate) and Epoxide Chain Extender.
In: Macromolecular Materials and Engineering, Macromolecular Materials and Engineering.
Vol. 308
(2023)
Issue 7
.
- 2200683.
ISSN 1438-7492
DOI der Verlagsversion: https://doi.org/10.1002/mame.202200683
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Project's official title Project's id Open Access Publizieren No information |
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Deutsche Forschungsgemeinschaft |
Abstract
Abstract Polyesters, such as poly (butylene terephthalate) (PBT), owe a rather low melt strength, which is considered as not beneficial for foaming. To overcome this issue, a typical attempt is the incorporation of chemical modifications - so-called chain extenders (CE) - in the reactive extrusion process. In this study, the reaction kinetic variables are investigated depending on the material and process parameters. For this purpose, different series of experiments are performed with varying PBT with different molecular weights and the commonly used CE, Joncryl ADR4468, on a micro compounder. The screw force is recorded and analyzed using an Avrami and an Arrhenius plot. First, the amount of CE is systematically varied. To study the course of the reaction in more detail, the reaction is stopped in a series of measurements (10, 30, 60, and 90 s after complete filling). Gel permeation chromatography (GPC), Fourier transform infrared spectroscopy (FT-IR), and Raman spectra are recorded. In the second series, the effect of processing temperatures between 250 and 270 °C is investigated, and finally, in the third series, the average molecular weight of PBT is varied. It could be shown that the activation energy seems to be dependent on the initial molecular weight; lower molecular weights result in lower activation energy.
Further data
| Item Type: | Article in a journal |
|---|---|
| Keywords: | chain extenders; micro compounders; poly (butylene terephthalate); reaction kinetics; reactive extrusion |
| DDC Subjects: | 600 Technology, medicine, applied sciences > 620 Engineering |
| Institutions of the University: | Faculties > Faculty of Engineering Science > Chair Polymer Materials > Chair Polymer Materials - Univ.-Prof. Dr.-Ing. Holger Ruckdäschel Faculties Faculties > Faculty of Engineering Science Faculties > Faculty of Engineering Science > Chair Polymer Materials |
| Language: | English |
| Originates at UBT: | Yes |
| URN: | urn:nbn:de:bvb:703-epub-8330-6 |
| Date Deposited: | 20 Mar 2025 06:59 |
| Last Modified: | 20 Mar 2025 09:51 |
| URI: | https://epub.uni-bayreuth.de/id/eprint/8330 |
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