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Improving the flame‐retardant property of bottle‐grade PET foam made by reactive foam extrusion

Bethke, Christian ; Goedderz, Daniela ; Weber, Lais ; Standau, Tobias ; Döring, Manfred ; Altstädt, Volker (2020)
Improving the flame‐retardant property of bottle‐grade PET foam made by reactive foam extrusion.
In: Journal of Applied Polymer Science, 137 (35)
doi: 10.1002/app.49042
Article, Bibliographie

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Abstract

Upcycling of low intrinsic viscosity (IV) poly(ethylene terephthalate) (PET) grades, such as bottle‐ or recycled grades, by a reactive foam extrusion process, provides an appropriate alternative to high pricing, high IV grades commonly used for foaming applications. However, the drawback of bottle‐grade PET foams is its flame retardant (FR) performance. In this study, pyromellitic dianhydride was used as a chain extender to foam bottle‐grade PET. The influence of different FRs, containing halogenated (HFR) and four different phosphorous‐based types, on the processability and final foam properties was investigated. HFR showed better processability to achieve proper foams with fine morphology compared to P‐based FRs, where the FR content was adjusted between 2 and 5 wt%. However, HFR exhibited lower FR performance by cone calorimeter testing compared to the P‐based FRs and the commercial reference foam Kerdyn. Nonetheless, all of the FRs can only improve the time to ignition of the neat PET foams while the other values depend on the specific type of FR. In addition, all FR foams have improved mechanical properties more than twice in comparison to the neat PET foam.

Item Type: Article
Erschienen: 2020
Creators: Bethke, Christian ; Goedderz, Daniela ; Weber, Lais ; Standau, Tobias ; Döring, Manfred ; Altstädt, Volker
Type of entry: Bibliographie
Title: Improving the flame‐retardant property of bottle‐grade PET foam made by reactive foam extrusion
Language: English
Date: 2020
Place of Publication: New York
Publisher: Wiley
Journal or Publication Title: Journal of Applied Polymer Science
Volume of the journal: 137
Issue Number: 35
Collation: 15 Seiten
DOI: 10.1002/app.49042
Corresponding Links:
Abstract:

Upcycling of low intrinsic viscosity (IV) poly(ethylene terephthalate) (PET) grades, such as bottle‐ or recycled grades, by a reactive foam extrusion process, provides an appropriate alternative to high pricing, high IV grades commonly used for foaming applications. However, the drawback of bottle‐grade PET foams is its flame retardant (FR) performance. In this study, pyromellitic dianhydride was used as a chain extender to foam bottle‐grade PET. The influence of different FRs, containing halogenated (HFR) and four different phosphorous‐based types, on the processability and final foam properties was investigated. HFR showed better processability to achieve proper foams with fine morphology compared to P‐based FRs, where the FR content was adjusted between 2 and 5 wt%. However, HFR exhibited lower FR performance by cone calorimeter testing compared to the P‐based FRs and the commercial reference foam Kerdyn. Nonetheless, all of the FRs can only improve the time to ignition of the neat PET foams while the other values depend on the specific type of FR. In addition, all FR foams have improved mechanical properties more than twice in comparison to the neat PET foam.

Uncontrolled Keywords: cone calorimetry, flame retardant, mechanical properties, PET, reactive foam extrusion
Identification Number: 49042
Additional Information:

Artikel-ID: 49042

Classification DDC: 500 Science and mathematics > 540 Chemistry
Divisions: 07 Department of Chemistry
07 Department of Chemistry > Ernst-Berl-Institut > Fachgebiet Makromolekulare Chemie
Date Deposited: 24 Jan 2024 07:12
Last Modified: 24 Jan 2024 07:12
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