Thermal induction

If the reacting system is initiated under conditions similar to point 4, pure thermal explosions develop and these explosions have thermal induction or ignition times associated with them. As will be discussed in subsequent paragraphs, thermal explosion (ignition) is possible even at low temperatures, both under the nonadiabatic conditions utilized in obtaining hydrocarbon-air explosion limits and under adiabatic conditions. 

In consideration of external effects, it is essential to emphasize that under some conditions the thermal induction period could persist for a very long period of time, even hours. This condition arises when the vessel walls are thermally insulated. In this case, even with a very low initial temperature, the heat of the corresponding slow reaction remains in the system and gradually self-heats the reactive components until ignition (explosion) takes place. If the vessel is not insulated and heat is transferred to the external atmosphere, equilibrium is rapidly reached between the heat release and heat loss, so thermal explosion is not likely. This point will be refined in Section C.2.a. 

A) Thermal Induction Time Test consists of measuring the induction time of a highly confined sample (ca 40mg) of explosive, or explosive-inert mixture, as a function of temperature. The LASL version of the test is described by J. Zinn R.N. Rogers in JPhysChem 66, 2646(1962) it is modeled after the test developed by H. Henkin R. McGill in IEC 44, 1391(1952)... 

Perfluoroalkyl sulfonyl halides are also good photochemical sources of perfluoroalkyl radicals, and they may also be used under thermal-induction, with a radical initiator, to form Rj in a synthetically useful manner [62]. 

A concerted pericyclic reaction has a single transition state, whose activation energy may be supplied by heat (thermal induction) or by ultraviolet light (photochemical induction). Some pericyclic reactions proceed only under thermal induction, and others proceed only under photochemical induction. Some pericyclic reactions take place under both thermal and photochemical conditions, but the two sets of conditions give different products. 

The drastic changes that are implicit in this discussion are compatible with the rather harsh reaction conditions employed in this experiment. In fact, instead of limiting alternatives, strongly acidic media in highly polar solvents (acetic acid) facilitate the numerous pathways open to thermal induction and... 

In addition, aUcynyl groups not only inhibit thermally inducted depolymerization, they can also be functionalized by, for example, hydroboration, hydro-silylation, or by attaching transition metal complex fragments. Accordingly, nnits provide an access to multicomponent ceramics. For example, Corriu et al. reported that [SiR2C=C-C=C] are precursors with interpenetrating networks to... 

Stracke, A., Wendorff, J. H., Goldmann, D., Janietz, D., and Stiller, B. Gain effects in optical storage Thermal induction of a surface relief grating in a smectic liquid crystal. Adv Mater, 2000,12, pp. 282-285. 

Thermochemical Equilibrium. One of the unique features of the thermal induction plasma is stable operation with low gas flow. Since... 

Scheme 5. Reactions of a tin maleate stabilizer during the thermal induction...

Non-Thermal Inductively Coupled RF Discharges in Cylindrical Coil... 

Not sure. Nothing visible. Some kind of implant. Maybe a thermal induction field generator. He burnt my leg and damaged the windscreen."... 

Two of Jezzibella s bodyguards caught sight of the approaching gangsters. They began to run forwards, drawing their thermal induction pistols. 

The mercenaries had linked combat programs, coordinating their response. Guidance and orientation programs allowed them to fix an accurate line on the transit capsule door and bring their weapons to bear. Thermal induction pulses discharged, maser beams slashed about. 

From Figs. 3.8, 3.9, and 3.10 it is evident that autocatalytic reactions are capable of strong temperature rises. The thermal induction time is all the shorter the higher the reaction temperature before cooling failure. These statements hold as well for autocatalytic reactions of other orders than the one of second order treated here. 

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