Flash pyrolysis of hydroxyl-terminated polybutadiene (HTPB) II: Implications of the kinetics to combustion of organic polymers

Literature survey for a first choice of a fuel-oxidiser couple for hybrid propulsion based on kinetic justifications

“…Over 643 K and up to 883 K, the flash pyrolysis of HTPB is found to be exothermic, while it is endothermic under 643 K [15,16]. The pyrolysis depends on the liquefaction process under 803 K and on that of desorption over 803 K. A pressure effect is shown, linked to this observation, A sudden change in gaseous products formation is found around 803 K for low pressure while this disappears for higher pressures.…”

“…For the combustion, the global heat release measured during the entire combustion, which is proportional to the maximum instantaneous one, can also be used [13,14]. Transient phenomena in combustion, like temperature and pressure oscillations [15,16], could not be observed without pyrolysis kinetics. In comparison with hybrid propulsion, solid propulsion is more widely studied using a detailed kinetic approach [17].…”

“…Some numerical schemes are notably available for PE (simplified [32,49,[55][56][57] or detailed [58]) and with one step Arrhenius law or semi detailed mechanisms for halogenated polymer [54], for PET [59], PS [31,60] , PP [60], HTPB [15,16]. In the formation of a simplified scheme, the Arrhenius parameters are necessary for the consumption of initial polymer, for example HTPB [61], but also for the formation of pyrolysis products.…”

“…In the formation of a simplified scheme, the Arrhenius parameters are necessary for the consumption of initial polymer, for example HTPB [61], but also for the formation of pyrolysis products. A maximum of six major gaseous products has been found for HTPB detailed kinetic pyrolysis (Butadiene, 4-vinyl-l-cyclohexene, trans-butadiene oligomers, ethylene, 1,5 hexadiene and cyclopentene) [15,16].…”

“…The same thermodynamic approach has been used for PMMA (chemical Comparing to literature at around 800 K [80][81][82] 96.14 -221.5 [19] 445.2 [23] 222.3 -373.4 [23] 8.78 -275.9 [16] Regression rate (mm s -1 ) at 960K…”