Casting single-base

Single-base casting powder the casting powder consists of nitrocellulose, stabilizer, solid additives for ballistic modification, and a small amount of plasticizer. The normal ratio of casting powder to casting solvent, 2 1 by volume, yields a final composition of approximately 60% nitrocellulose. 

Triacetin has been used as a solvent for acetocellulose and as a plasticizer in the pyroxylin industry (Ref 5). It was patented by Hale Cameron (Ref 3) as a flash reducing agent in NC propellants. According to Ref 4, triacetin acts as a gelatinizing and waterproofing agent. It has been used successfully as plasticizer and coolant in single-base propellants and in cast doublebase propellants (see Note)... 

Nitrocelluloses (Shokamen), such as described in Vol 2 of Encycl under CELLULOSE, were used in NC Propellants (Shokayaku) or Single-Base Proplnts. See under PROPELLANTS 7350m/sec for cast (Shimose) vs 6900 for TNT Impact Sensitivity by BurMinesApp with 2-kg weight 85cm vs 100 for TNT [AMCP 706-177 (1971), p 288]. Used by the Japanese Army as a press-loaded Booster Charge in Bombs, Shells,... 

Some information based on the description by Steiiiberger and Orechse [40] is given here. They give the composition of single base, double base and coiii-pi>sile cast propellants in Table 123. 

Figure 4.11 Standard pipe installations for a single air valve. A/ofe. Unless otherwise directed, pre-cast concrete units shall be bedded on well-compacted granular material Type A brought up from the base of the trench...

A series of aggregation structures of bilayer forming azobenzene amphiphiles, CnAzoCmN+Br, both in single crystals and cast films was determined by the X-ray diffraction method and uv-visible absorption spectroscopy. From the relationship between chemical structures and their two-dimensional supramolecular structure, factors determining the molecular orientation in bilayer structure were discussed. Some unique properties based on two-dimensional molecular ordering were also discussed. 

Structural characterizations of the immobilized bilayer assemblies are essential for the molecular design of the functional materials. On the bases of the systematic crystallographic investigation of single crystals of double-chain ammonium amphiphiles [9], Okuyama wrote a computer simulation program for the calculation of bilayer structures in cast bilayer films and bilayer thicknesses estimated from the repeating period in the X-ray diffraction data have been exclusively used for structural discussions [10,11]. 

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