| 초록 |
Novel energetic thermoplastic elastomer(TPE) binders are being explored and characterized in an attempt to lower processing costs, improve ruggedness and storage safety, and increase energetic content in future explosive formulations and solid rocket propellants. Energetic Poly(NMMO) and Poly(GDPC) prepolymer can be used to linear homopolymer of oxetane, and oxirane derivatives. Polymerization of NMMO, GDPC initiated by BF3.O(C2H5)2 produced poly(NMMO), Poly(GDPC) prepolymer of number molecular weight(Mn) about 2,500∼3,000. Synthesis principle for energetic poly(NMMO) thermoplastic elastomers were prepared from the appropriate poly(NMMO), Poly(GDPC) prepolymer, diisocyanate MDI, TDI and chain extender(BD) in dichloroethane. The following properties of TPE-PNMB-XX's are melting temperatures high enough for useful mechanical properties and low enough for safe processing (-70 to 100 ) ;crystallization rate of 5 to 10 minutes at room temperature; glass transition temperatures of -15 to -30 ; controllable molecular weights(Mw) from 10,000 to 30,000; and in many cases, molecular weight distributions of 1.4 to 2.4. Analytical techniques were developed and have provided partial understanding of the polymerization mechanism.
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