초록 ▼

An energetic copolyurethane thermoplastic elastomer (ETPE) is prepared by polymerizing a dihydroxyl terminated telechelic energetic polymer having a functionality of two or less with a diisocyanate at a NCO/OH ratio of about 0.7 to 1.2. The resulting copolymer is easy to incorporate in gun propellan

An energetic copolyurethane thermoplastic elastomer (ETPE) is prepared by polymerizing a dihydroxyl terminated telechelic energetic polymer having a functionality of two or less with a diisocyanate at a NCO/OH ratio of about 0.7 to 1.2. The resulting copolymer is easy to incorporate in gun propellant or explosive formulations and is recyclable. These energetic copolyurethane thermoplastic elastomers were obtained mainly by macropolymerization of GAP prepolymers with 4,4'-methylenebis-phenyl isocyanate (MDI). In these syntheses, GAPs having molecular weights of 500, 1000 and 2000 were used as macromonomers and polymerized with MDI to yield three different copolyurethane thermoplastic elastomers. This process may be applied to any dihydroxyl terminated energetic prepolymers. The hard segments of the ETPE are obtained by the formation of hydrogen bonds between the urethane groups.

대표청구항 ▼

1. An energetic thermoplastic elastomer comprising a hard segment generated by the formation of hydrogen bonds between a first urethane group of one linear copolymer chain with a second urethane group of another linear copolymer chain and a chain extender, wherein the first and second urethane group

1. An energetic thermoplastic elastomer comprising a hard segment generated by the formation of hydrogen bonds between a first urethane group of one linear copolymer chain with a second urethane group of another linear copolymer chain and a chain extender, wherein the first and second urethane groups are selected from the group consisting of: [EQU13]and the energetic thermoplastic elastomer, further comprises a soft segment generated by a macromonomer derived from a prepolymer selected from the group consisting of glycidyl azide polymer, poly-3-azidomethyl-3-methyloxetane, poly-3-nitratomethyl-3-methyloxetane, and poly-glycidyl nitrate.