Abstract
The aging behavior of a composite propellant is a key indicator in the service life of a practical rocket motor. Advancements in the development of nano-particle additives and their burning rate enhancing characteristics give rise to examining the long-term impacts on the service life of the motor. Recent research at Texas A&M has focused on tailoring ballistic characteristics through the addition of nano-additives specifically synthesized for composite propellants. This paper focuses on an AP/HTPB propellant with a dry-powder nano-titania additive to influence ballistic characteristics and fluorescing Lumidots to assess morphological changes associated with accelerated aging. Sample sets were aged at 85 o C in ambient humidity conditions for six and twelve days, simulating four and eight years of aging, respectively. Data were correlated to a set of naturally aged samples. Acceleratedaged monomodal AP formulations with 80% solids loading and nano-additive demonstrated an approximate 7% decrease in burning rate, with accompanying morophological changes. Accelerated-aged bimodal AP forumlations with 85% solids loading and nano-additive demonstrated an approximate 12% increase in burning rates, with accompanying morphological changes.
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