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Tailoring Epoxy Resin Foams by Pre-Curing with Neat Amine Hardeners and Its Derived Carbamates

DOI zum Zitieren der Version auf EPub Bayreuth: https://doi.org/10.15495/EPub_UBT_00006475
URN to cite this document: urn:nbn:de:bvb:703-epub-6475-9

Title data

Bethke, Christian ; Goller, Sebastian Manfred ; Du Ngoc, Uy Lan ; Kaysser, Simon T. ; Altstädt, Volker ; Ruckdäschel, Holger:
Tailoring Epoxy Resin Foams by Pre-Curing with Neat Amine Hardeners and Its Derived Carbamates.
In: Polymers. Vol. 13 (2021) Issue 8 . - No. 1348.
ISSN 2073-4360
DOI der Verlagsversion: https://doi.org/10.3390/polym13081348

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Project information

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Particle-filled epoxy foam as new material concept for high precision abrasives and structural parts
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Project financing: EU-Forschungsinitiative EUREKA
This research was funded by the Eurostars-2 joint program with co-funding from the European Union Horizon 2020 research and innovation program with the grant number 01QE1816B. The open access charges were funded by the University of Bayreuth in the funding program Open Access Publishing.

Abstract

The use of amine-based carbamates with their dual function, acting as amine curing agents and CO2 blowing agents after their decomposition without by-products, are promising for ecofriendly epoxy foams as high-performance materials. However, controlling cell morphology requires a proper adjustment of the viscosity at the foaming step. The viscosity is altered not only by blending neat amine and its derived carbamate at a fixed pre-curing time, but also by changing the pre-curing time at a fixed blend ratio. Within this study, diglycidylether of bisphenol A (DGEBA) epoxy resin is mixed with different blend ratios of isophorone diamine (IPDA) and its derived carbamate (B-IPDA). The systems are characterized by DSC and rheology experiments to identify the pre-curing effects on the derived epoxy foams. Epoxy foams at a blend ratio of 30/70w IPDA/B-IPDA showed the best foam morphology and an optimum Tg compared to other blend ratios. Furthermore, it was found that both pre-curing times, 2 h and 3 h, for the 30/70w IPDA/B-IPDA system reveal a more homogeneous cell structure. The study proves that the blending of neat amine and carbamate is beneficial for the foaming performance of carbamate systems.

Further data

Item Type: Article in a journal
Keywords: epoxy foam; thermoset foam; carbamate; pre-curing; batch foaming; rheology; DSC
DDC Subjects: 600 Technology, medicine, applied sciences > 620 Engineering
Institutions of the University: 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
Faculties > Faculty of Engineering Science > Chair Polymer Materials > Chair Polymer Materials - Univ.-Prof. Dr.-Ing. Holger Ruckdäschel
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)
Faculties
Language: English
Originates at UBT: Yes
URN: urn:nbn:de:bvb:703-epub-6475-9
Date Deposited: 07 Jul 2022 10:12
Last Modified: 14 Sep 2023 10:38
URI: https://epub.uni-bayreuth.de/id/eprint/6475

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