An Interphasic Region between Nitrocellulose and Nitroguanidine in triple base propellant

✍ Scribed by C. W. Fong; R. C. Warren

• Book ID: 105355365
• Publisher: John Wiley and Sons
• Year: 1985
• Tongue: English
• Weight: 605 KB
• Volume: 10
• Category: Article
• ISSN: 0721-3115
• DOI: 10.1002/prep.19850100304

✦ Synopsis

Abstract

Evidence for the existence of an interphasic region in the nitroglycerin‐nitrocellulose matrix immediately surrounding the crystalline nitroguanidine filler in triple base propellant is presented for the first time. This interphasic region displays anomalous thermal expansion and mechanical relaxation behaviour compared to the bulk nitroglycerin‐nitrocellulose matrix in the propellant. The interphasic region accounts for the highly unusual thermal expansion behaviour of triple base propellants containing long needlelike nitroguanidine crystals. An interphasic region does not occur in similar propellant when the nitroguanidine filler is replaced by crystalline RDX. Thus the interphase region is thought to be a manifestation of a significant bindernitroguanidine interaction. Implications for munition survivability stemming from the existence of a separate polymeric interphase are discussed in terms of the thermal and relaxation behaviour of the interphasic binder‐crystalline filler interface.