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Investigation of the Thermal and Hydrolytic Degradation of Polylactide during Autoclave Foaming

Title data

Dreier, Julia ; Brütting, Christian ; Ruckdäschel, Holger ; Altstädt, Volker ; Bonten, Christian:
Investigation of the Thermal and Hydrolytic Degradation of Polylactide during Autoclave Foaming.
In: Polymers. Vol. 13 (2021) Issue 16 . - No. 2624.
ISSN 2073-4360
DOI: https://doi.org/10.3390/polym13162624

Abstract in another language

Polylactide (PLA) is one of the most important bioplastics worldwide and thus represents a good potential substitute for bead foams made of the fossil-based Polystyrene (PS). However, foaming of PLA comes with a few challenges. One disadvantage of commercially available PLA is its low melt strength and elongation properties, which play an important role in foaming. As a polyester, PLA is also very sensitive to thermal and hydrolytic degradation. Possibilities to overcome these disadvantages can be found in literature, but improving the properties for foaming of PLA as well as the degradation behavior during foaming have not been investigated yet. In this study, reactive extrusion on a twin-screw extruder is used to modify PLA in order to increase the melt strength and to protect it against thermal degradation and hydrolysis. PLA foams are produced in an already known process from the literature and the influence of the modifiers on the properties is estimated. The results show that it is possible to enhance the foaming properties of PLA and to protect it against hydrolysis at the same time.

Further data

Item Type: Article in a journal
Refereed: Yes
Keywords: Polyactide; Biofoam; Hydrolysis; Degradation
Institutions of the University: Faculties > Faculty of Engineering Science > Former Professors > Chair Polymer Materials - Univ.-Prof. Dr.-Ing. Volker Altstädt
Faculties > Faculty of Engineering Science > Chair Polymer Materials > Chair Polymer Materials - Univ.-Prof. Dr.-Ing. Holger Ruckdäschel
Result of work at the UBT: Yes
DDC Subjects: 600 Technology, medicine, applied sciences > 620 Engineering
Date Deposited: 05 Nov 2021 07:43
Last Modified: 05 Nov 2021 07:43
URI: https://eref.uni-bayreuth.de/id/eprint/67680