Figure of insensitiveness

Relative Sensitivity Based on Figure of Insensitiveness (F.l. (from Ref 3)... 

TABLE 11. Figure of insensitiveness (FI) compared to enthalpy of destabilization (DSE, kJ mol-1)... 

IMPACT SENSITIVITY OR SHOCK SENSITIVITY TESTS (Drop Weight or Falling Weight Tests). A list of various tests with refs is given in Vol 1, p XVII. Brief descriptions of US Bureau of Mines (BM) Apparatus and of Picatinny Arsenal (PA) Apparatus are also given on p XVII. British test called Figure of Insensitiveness (FI) is described on p XII (See also Refs 36, 38d, 41, 42, 53, 55b,... 

The value obtd by this test is called FI (Figure of Insensitiveness) and is defined more fully in Vol 1, p XII... 

N34.56%, OB—49.4% decomposes without ignition at 205° ignites immediately when dropped on a 350° surface. It is explosive is claimed to be about as impact sensitive as Tetryl (Figure of Insensitivity, FI, of 0.78). Its power is 136% PA. It is prepd by nitration of diendomethylene-tetrazacyclodecanemonohydrochloride,... 

A 40mg sample is placed on a brass cap which is inverted over the anvil. The falling weight is normally 5kg. If the volume of gas evolved by a 0.03mg sample is more than 1ml, then the test is considered a go. The Bruceton method is used and results are reported as Figure of Insensitiveness or FI which is ob-... 

Comparison of Impact Sensitivity Tests on the Basis of Figures of insensitivity, Fi FI ... 

FI Test (Figure of Insensitiveness Test)(Brit). An Impact Sensitiveness Test devised about 1908 by Dr G. Rotter at the British Government Research Establishment, Woolwich Arsenal. Important changes were introduced in the method in 1966 by Mortlock and Wilby (Ref 4). The original method and the modifications are described... 

The Figure of Insensitiveness for the standard explosive sample RDX is 80. Figure of Insensitiveness values for some primary and secondary explosives are presented in Table 4.3. 

Table 4.3 Figure of Insensitiveness (F of I )for some primary and secondary high explosives calculated from the results of the Rotter Impact Machine (5 kg falling weight on to 30 mg samples)...

As with the Figure of Insensitiveness to impact, the lower the value for the Figure of Friction the more sensitive the material is. 

Figure 4.2 Classification of primary and secondary explosives by their Figure of Insensitiveness (F of I)...

Impact Sensitivity. According to Fliirscheim (Ref 16,p 102T), TeNA is si less sensitive than tetryl and si more sensitive than PA. This agrees with tests conducted by Robert-son(Ref 18,p 18), who gives for FI(Figure of Insensitiveness) 86%PA for TeNA, 70%... 

PNA is a powerful and brisant expl, being comparable to RDX or PETN. Its sensitivity to impact is between values for PETN and LA, which would make this expl unsuitable for use as a filler for projectiles. It could be used, however, as an Initiating expl. Some numerical data for its power and sensitivity are given in Ref 9, such as Trauzl Test value 164% PA and FI (figure of insensitiveness)... 

Was prepd by nitrating N-methyl-N-phenyl-2,4-dinitroaniline with nitric acid (dl.49) (Refs 1 2). Its expl props are power by Trauzl Test 87% PA and FI (figure of insensitiveness) 92% PA (Ref 4). Hantzseh Opolski (Ref 3) also prepd the compd as well as its aci isomer, (OjNJjCgHj.N Hj-(NOj)a N.O.OCH3l violet crysts, mp 140-1° with decompn... 

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