Accession Number : ADA304206

Title :   The Effect of Ageing on PBXW-115 (Aust.), PBXN-1O3 and PBXN-1O5.

Descriptive Note : Technical rept.,

Corporate Author : DEFENCE SCIENCE AND TECHNOLOGY ORGANIZATION CANBERRA (AUSTRALIA)

Personal Author(s) : Bocksteiner, G. ; Whelan, D. J.

PDF Url : ADA304206

Report Date : NOV 1995

Pagination or Media Count : 32

Abstract : When PBXW-115 (Aust.) is exposed to accelerated ageing according to the program set out in DEFAUST 5168: Cycle B2, mass loss (attributed to loss of plasticiser, isodecyl pelargonate) occurs, the Shore A hardness increases and the tensile properties alter somewhat. There is a link between these changes and it is probably related to the plasticiser content of the samples. From a kinetic analysis, it appears as if there may be two consecutive mass loss processes operating in the accelerated ageing of PBXW-115 and each obeys a first order reaction kinetics profile; the first predominates up to the stage where a mass loss equivalent to ca. 55 % of plasticiser occurs, the second operates where the plasticiser content is low. However, in the time domain studied (one year), there is no evidence of catastrophic structural change (loss of integrity or propensity to crumble) in PBXW-115 (Aust.) under worst case conditions (test pieces of small volume and large relative surface area), suggesting that the explosive charge in warheads filled with PBXW-115 (Aust.) should remain intact over a long interval of time. jg p2

Descriptors :   *AGING(MATERIALS), *EXPLOSIVE CHARGES, *PLASTICIZERS, MODIFICATION, STRUCTURAL PROPERTIES, POLYMERS, MASS, TENSILE PROPERTIES, SURFACES, SAMPLING, LOSSES, KINETICS, CATASTROPHIC CONDITIONS, AUSTRALIA, TIME DOMAIN, HARDNESS, WARHEADS, INTERVALS.

Subject Categories : Pyrotechnics
      Polymer Chemistry
      Laminates and Composite Materials
      Logistics, Military Facilities and Supplies

Distribution Statement : APPROVED FOR PUBLIC RELEASE