Evaluation of aziridine bonding agent by means of chemical and instrumental techniques of analysis
doi: 10.5028/jatm.2009.01015561

Darci Cortes Pires
Instituto de Aeronáutica e Espaço
São José dos Campos - Brasil
darci@iae.cta.br

Aparecida M. Kawamoto
Instituto de Aeronáutica e Espaço
São José dos Campos - Brasil
cidak@iae.cta.br

Jairo Sciamareli
Instituto de Aeronáutica e Espaço
São José dos Campos - Brasil
sciamareli@iae.cta.br

Elizabeth C. Mattos
Instituto de Aeronáutica e Espaço
São José dos Campos - Brasil
beth@iae.cta.br

Milton F. Diniz
Instituto de Aeronáutica e Espaço
São José dos Campos - Brasil
miltond@iae.cta.br

Rita de Cássia L. Dutra*
Instituto de Aeronáutica e Espaço
São José dos Campos - Brasil
chefia.aqi@iae.cta.br

Koshun Iha
Instituto Tecnológico da Aeronáutica
São José dos Campos - Brasil
koshun@ita.br

*author for correspondence

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 cmˉ¹, 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 cmˉ¹, 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.

Keywords:

Wet chemistry, FT-IR, Bonding agent, Opening of aziridine ring.