| Popis: |
Methods were devised for using a polarizing microscope to study the condensed phase behavior of propellants. Some of the phenomena associated with this condition for nitrocellulose, catalyzed nitrocellulose, and double base propellant both with and without catalysts was elucidated. At the same time techniques of differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), and thin layer chromatography (TLC) were brought to bear on the problem. Optically and thermally measurable differences in catalyzed and uncatalyzed materials tended to be small and were probably not as great, for instance, as is to be found with certain cases of composite propellants. Nevertheless, clues were obtained as to ways the catalysts were affecting condensed phase behavior. Unraveling these problems fully remains a formidable task. |
