What is the most significant environmental factor affecting nitrocellulose propellants, and how is it controlled?

• A. Light exposure; using UV shielding.
• B. Temperature and humidity; controlled via climate-controlled magazines and dehumidification.
• C. Oxygen; using inert atmosphere.
• D. Vibration; using shock absorbers.

Answer: (B)

Temperature and humidity are the dominant environmental factors for nitrocellulose propellants. Elevated temperatures speed up decomposition reactions, while moisture uptake changes the physical and chemical stability of the powder, potentially causing degradation, caking, or altered burning behavior. Because these powders are sensitive to both heat and moisture, maintaining a stable, dry, and cool environment is crucial. This is why storage uses climate-controlled magazines and dehumidification to keep temperature and humidity within safe, prescribed ranges. Light exposure and oxygen can influence stability to some extent, but they are not the primary drivers the way temperature and moisture are, and vibration is more about physical handling than chemical stability.