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Evaluation of aziridine bonding agent by means of chemical and instrumental techniques of analysis

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Author(s): Darci Cortes Pires | Aparecida M. Kawamoto | Jairo Sciamareli | Elizabeth C. Mattos | Milton F. Diniz | Rita de Cássia L. Dutra* | Koshun Iha

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

Volume: 1;
Issue: 1;
Start page: 55;
Date: 2009;
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Keywords: Wet chemistry | FT-IR | Bonding agent | Opening of aziridine ring

ABSTRACT
A new method using wet chemistry and instrumental analysis has been developed for evaluating the ring-opening of aziridine tris [1-(2 methyl) aziridinyl] phosphide oxide (MAPO) of the bonding agent used in composite propellant. A reduction was observed in the intensity absorption bands in 1400 and 1040 cm-1, characteristic of aziridinic ring. It was also observed, in some cases, that when the number of open aziridinyl ring increases, the NH band in the range 3400-3300 cm-1, that appears with ring-opening, is located in the region of lower wave numbers. The study of the synthesis of MAPO derivative indicated side reactions such as homopolymerization of rings and also, with secondary hydroxyl of the 12-hydroxy stearic acid and probable humidity existent in the original sample.

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