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BAMO copolymer

Since BAMO polymer is a solid at room temperature, BAMO monomer is copolymerized with tetrahydrofuran (THF) in order to formulate a liquid BAMO copolymer that is used as a binder in propellants and explosives, as shown in Fig. 4.9. The terminal OH groups of the BAMO-THF copolymer are cured by reaction with the NCO groups of hexamethylene diisocyanate (HMDl) and then cross-linking is carried out with trimethylolpropane (TMP). The physical properties of such a copolymer with a BAMO/THF composition of 60/40 mol% are shown in Table 4.7.1151... [Pg.85]

The heat of decomposition, Qj, of BAMO copolymer containing different levels of N3 bond density, KN3), is shown as a function of KN3) in Fig. 5.21. BAMO prepolymer is copolymerized with THF. The N3 bond density is varied by adjusting the mass fraction ratio of BAMO prepolymer and THF. [Pg.135]

The condensed-phase reaction zone of a burning-interrupted BAMO copolymer is identified by infrared (IR) spectral analysis. In the non-heated zone, the absorption of the N3 bond, along with the absorptions of the C-O, C-H, and N-H bonds. [Pg.135]

Fig. 5.21 Heat of decomposition increases with increasing N3 bond density in BAMO copolymer. Fig. 5.21 Heat of decomposition increases with increasing N3 bond density in BAMO copolymer.
Fig. 5.22 The burning rate of BAMO copolymer increases with increasing heat of decomposition and aiso with increasing Nj bond energy. Fig. 5.22 The burning rate of BAMO copolymer increases with increasing heat of decomposition and aiso with increasing Nj bond energy.
Substituting the and data into Eqs. (3.75) and (3.76), the temperature sensitivity of the gas phase, O, as defined in Eq. (3.79), and of the solid phase, as defined in Eq. (3.80), are determined as 0.0028 and 0.0110 respectively W is approximately four times greater than O. The computed Op represented by the sum of O and W is therefore 0.014 which is approximately equal to the Op derived from burning rate experiments. The heat of reaction at the burning surface is the dominant factor on the temperature sensitivity of the burning rate of the BAMO copolymer. [Pg.139]

Figure 5-14. Heat of decomposition increases as N3 bond density within BAMO copolymer increases. Figure 5-14. Heat of decomposition increases as N3 bond density within BAMO copolymer increases.
The condensed phase reaction zone of a buming-interrupted BAMO copolymer is identified by infrared (IR) spectra analysis. In the nonheated zone, the absorptions of N3, C-O, C-H, and N-H bonds are seen. In the surface reaction zone (0-0.5 mm below the burning surface), the absorption of N3 bonds is eliminated. However, the absorptions of C-O, C-H, and N-H bonds remain as observed in the nonheated zone. This suggests that an exothermic reaction occurs by decomposition of N3 bonds at the subsurface- and surface-reaction zones1301. [Pg.116]

During BAMO copolymer burning in a pressurized inert atmosphere gaseous and carbonaceous solid fragments are formed exothermically at the burning surface. The temperature in the combustion wave of BAMO copolymer increases from the initial temperature T0 to the burning surface temperature Ts, and to the flame temperature Tf. The burning surface temperature of BAMO copolymer composed of BAMO/THF = 6/4 increases as T0 increases at constant pressure p = 3 MPa Ts = 700 K at T0 = 243 K and Ts = 750 K at T0 = 343 K. The effect of T0 on Ts defined in (idTs/dT0)p is determined to be 0.50 31l... [Pg.118]


See other pages where BAMO copolymer is mentioned: [Pg.136]    [Pg.137]    [Pg.137]    [Pg.139]    [Pg.136]    [Pg.137]    [Pg.137]    [Pg.74]    [Pg.116]    [Pg.116]    [Pg.119]   
See also in sourсe #XX -- [ Pg.135 ]

See also in sourсe #XX -- [ Pg.135 ]




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Burning rate of BAMO copolymer

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