Egenskaper til PBXN-109 aldret i 18 mnd. ved 60 grader C - PBXN-109 med RS-RDX Ch. 719 03 v. 78 krystaller

Abstract

Questions have been asked about the stability of RS-RDX with regard to shock sensitivity during the lifecycle of a PBX. To study if RS-RDX does change properties due to ageing, PBXN-109 was selected as our composition for an ageing study. RDX crystals were produced by Dyno Nobel. The study includes testing of virgin PBXN-109 and PBXN-109 aged at 60oC for 3, 6, 12 and 18 months. In addition to shock sensitivity determined by Intermediate Scale Gap Test, the test programme included testing of Critical Diameter and Shore A hardness. This report contains test results for PBXN-109 aged 18 mounts at 60oC. The obtained shock sensitivity of 57 kbar is slightly lower than for virgin PBXN-109 containing RS-RDX CH. 719/03 v.78. For PBXN-109 aged 18 months a critical diameter of 7.3 mm was observed, this is slightly lower than for virgin material but not different from samples aged for 3, 6 and 12 months. The Shore A hardness has increased slightly after ageing at 60oC for 18 months both compared with the Shore A hardness properties of virgin and samples aged for 3, 6 and 12 months.