A Novel DOPO-Based Diamine as Hardener and Flame Retardant for Epoxy Resin Systems
| Autor: | Bernhard Schartel, Volker Altstädt, Olaf Walter, Michael Ciesielski, Jan K.W. Sandler, R. M. Perez, Manfred Döring, Johannes Artner |
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| Rok vydání: | 2008 |
| Předmět: |
Materials science
Polymers and Plastics General Chemical Engineering Organic Chemistry chemistry.chemical_element Epoxy chemistry.chemical_compound Acetic anhydride chemistry Nitric acid Diamine visual_art Polymer chemistry Materials Chemistry visual_art.visual_art_medium Curing (chemistry) Palladium Fire retardant Flammability |
| Zdroj: | Macromolecular Materials and Engineering. 293:503-514 |
| ISSN: | 1439-2054 1438-7492 |
| Popis: | 10-Ethyl-9-oxa-10-phosphaphenanthrene-10-oxide (1) can be nitrated using acetic anhydride and fuming nitric acid. The nitro group is reduced using palladium on charcoal and hydrogen. These reaction conditions are used for the synthesis of an analogous DOPO-based diaminic hardener (7). An evaluation of the curing behavior, mechanical properties and flammability of a neat resin made of DGEBA and 7 (DGEBA + 7) and of a carbon fiber-reinforced resin made of DGEBA, 4,4-diaminodiphenylsulfon (DDS) and 7 (DGEBA + DDS + 7) shows the potential of this hardener to lead to flame-retardant systems while keeping relevant properties on a high level; especially when compared to a similar system (DGEBA + DDS + 1). |
| Databáze: | OpenAIRE |
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