Polymorphism: characterization and study of the properties of
a crystalline phase
doi: 10.5028/jatm.2010.02038310

Gilson da Silva*
Instituto Nacional da Propriedade Industrial
Rio de Janeiro – Brazil
gilsondasilva@uol.com.br

Koshun Iha
Instituto Tecnológico de Aeronáutica
São José dos Campos – Brazil
koshun@ita.br

*author for correspondence

Abstract:

Despite the same chemical composition, the physicochemical properties of polymorphs can be totally different, such as leading or not electricity. The legality of recognize them as completely new products is discussed, in front of the characteristics that a polymorph may have over another. The fact is that the differential solubility and stability and formation of active sites in different phases of a substance engage the interest of many active sectors of the economy. There are no few polymorphic energetic materials, or their precursors, which also have therapeutic applications. Therefore, some of the techniques developed by the lucrative pharmaceutical industry to study the polymorphism can be tailored to the needs of the war industry. This paper presents energetic and pharmacological materials recognized for their polymorphism and discuss properties, characterization techniques and the study of phase transition in these materials.

Keywords:

Polymorphism, CL-20, HMX, FT-IR, DSC, DRXP.

J. Aerosp.Technol. Manag., São José dos Campos, Vol.2, No.3, pp. 331-338, Sep-Dec., 2010
Received: 29/07/10
Accepted: 22/08/10