Effet des Plastifiants sur la Temperature de Transition Vitreuse, Tg, du Butadiene a Terminaison Hydroxy et du Polyazoture de Glycidyle - Simulations et Experiences (Effect of the Plasticizers on the Vitreous Transition Temperature, Tg, of the Butadiene to Termination Hydroxy and the Polyazoture of Glycidyle - Simulations and Experiences)
DEFENCE RESEARCH AND DEVELOPMENT CANADA VALCARTIER (QUEBEC)
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High performance propellants and explosives are based on the binding of energetic crystalline solids within a cured elastomeric polymer matrix in order to impart acceptable insensitivity and good mechanical properties to the material. Most plastic-bonded explosives PBX used are based on the inert rubbery hydroxyl-terminated polybutadiene polymer HTPB. The total energetic density of PBXs may then be enhanced by replacing this inert polymer by an energetic one. Mechanical properties of the material should be remained acceptable with the use of an appropriate plasticizer. The glass transition temperature named T g of a polymer blend is a representative data and an useful measurement which allows to assess how the polymer rubbery is, and as well how the material sensitivity is. This T g property was predicted by computer modelling, and was also measured experimentally for inert HTPB and energetic GAP polymers.