| 초록 |
In this research, N-Guarnylurea dinitramide (GUDN) crystal was gotten by cooling crystallization process. The initial solution contains Dimethylformamide, water, GUDN and polymer. The ratio between DMF and water was maintained at 4:6 in mass, GUDN was loaded enough to make saturated solution at 70°C. The effects of some factors like concentration of polymer and polymer types on crystal size and shape will be discussed.The results indicate that polymer has strong effects on crystal size and especially crystal shape, crystal tends to be thin and flat in case using Methyl cellulose 4000, and big and rough when Span 80 was used as surfactant. In addition, using sufficient amount of polymer can minimize the number of oligomeric crystals, and narrow crystal size distribution. |
