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Influence of polymer molecular weight, temperature, and strain rate on the mechanical properties of pbx 9501.

DE2001783223

Publication Date	2001
Personal Author	Idar, D. J.; Thompson, D. G.
Page Count	5
Abstract	Compression and tensile measurements were conducted on newly formulated (baseline) and lower molecular weight (virtually-aged) plastic explosive PBX 9501. The PBX 9501 binder system is composed of nitroplasticized Estane 5703, TM a polyester polyurethane copolymer. The molecular weight of polyester urethanes can degrade with time as a function of hydrolysis, affecting the mechanical behavior of the polymer or a polymer composite material of high explosives, i.e. PBXs. The molecular weight of Estance 5703 TM was degraded by exposure to high temperature and humidity of different periods of time, and then formulated to produce 'virtually-aged' PBX 9501 specimens. Quasi-static and dynamic compression tests were conduced on the baseline and virtually-aged PBX 9501 as a function of temperature and strain rate. Quasi-static tensile tests were also conduced as a function of temperature and test rate. Rate and temperature dependence was exhibited during both compression and tensile loading. Results also show significant differences between the baseline and virtually-aged specimens for the dynamic compression tests at -15 C, and for the quasi-static compression tests at -15 C, 22 C, and 50 C.
Keywords	Polymers Plastic bonded explosives Molecular weight Composite weight Plastics Temperature Mechanical properties Compression Strain(Mechanics)
Source Agency	Technical Information Center Oak Ridge Tennessee
NTIS Subject Category	71O - Plastics 99C - Polymer Chemistry 79A - Ammunition, Explosives, & Pyrotechnics
Corporate Authors	Los Alamos National Lab., NM.; Department of Energy, Washington, DC.
Document Type	Conference Proceedings
NTIS Issue Number	200210
Contract Number	W-7405-ENG-36

Influence of polymer molecular weight, temperature, and strain rate on the mechanical properties of pbx 9501.

Influence of polymer molecular weight, temperature, and strain rate on the mechanical properties of pbx 9501.
DE2001783223

Publication Date	2001
Personal Author	Idar, D. J.; Thompson, D. G.
Page Count	5
Abstract	Compression and tensile measurements were conducted on newly formulated (baseline) and lower molecular weight (virtually-aged) plastic explosive PBX 9501. The PBX 9501 binder system is composed of nitroplasticized Estane 5703, TM a polyester polyurethane copolymer. The molecular weight of polyester urethanes can degrade with time as a function of hydrolysis, affecting the mechanical behavior of the polymer or a polymer composite material of high explosives, i.e. PBXs. The molecular weight of Estance 5703 TM was degraded by exposure to high temperature and humidity of different periods of time, and then formulated to produce 'virtually-aged' PBX 9501 specimens. Quasi-static and dynamic compression tests were conduced on the baseline and virtually-aged PBX 9501 as a function of temperature and strain rate. Quasi-static tensile tests were also conduced as a function of temperature and test rate. Rate and temperature dependence was exhibited during both compression and tensile loading. Results also show significant differences between the baseline and virtually-aged specimens for the dynamic compression tests at -15 C, and for the quasi-static compression tests at -15 C, 22 C, and 50 C.
Keywords	Polymers Plastic bonded explosives Molecular weight Composite weight Plastics Temperature Mechanical properties Compression Strain(Mechanics)
Source Agency	Technical Information Center Oak Ridge Tennessee
NTIS Subject Category	71O - Plastics 99C - Polymer Chemistry 79A - Ammunition, Explosives, & Pyrotechnics
Corporate Authors	Los Alamos National Lab., NM.; Department of Energy, Washington, DC.
Document Type	Conference Proceedings
NTIS Issue Number	200210
Contract Number	W-7405-ENG-36