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Synthesis and characterization by infrared spectroscopy of hydantoin-based bonding agents, used in composite propellants

Author(s): Darci C. Pires | Denise V. B. Stockler-Pinto | Jairo Sciamareli | Jorge Roberto da Costa | Milton Faria Diniz | Koshun Iha | Rita de Cássia L. Dutra

Journal: Journal of Aerospace Technology and Management
ISSN 1984-9648

Volume: 1;
Issue: 2;
Start page: 177;
Date: 2009;
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Keywords: Hydantoin | Synthesis | Characterization | MIR | Composite propellant

Reactions to obtain hydantoin derivatives were carried out with 5,5-dimethylhydantoin and short-chain aldehydes. Monitoring of the reactions was performed using qualitative mid-infrared spectroscopy (MIR) through the formation of new bands characteristic of the desired product. MIR analysis showed that these spectrometric alterations occur only in the reaction with the formaldehyde, indicating the formation of the desired product, 1,3-bis (hydroxymethyl) 5,5-dimethylhydantoin, in the presence of water. The absorption bands that confirmed the reaction were observed at 3334 cm-1 (υ OH), 1770 and 1710 cm-1 (υ C=O) and 1056 cm-1 (υ C-O), the last of which is assigned to the group containing primary hydroxyl.

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