Relative brisance impact sensitivity

Nitroisobutylglycol dinitrate). CH3.C.N02(CH20N02)2, mw 225.14, N 18.67%, OB to C02 —24.87%, mp 38°, ignites above 240°. Prepd from the glycol by nitration with mixed acid, with 90% yield. Brisance, crushes 53g sand, equivalent to Tetryl. Qc is 531.4cal/mole. Impact sensitivity, FI 86% relative to PA, with Bruceton No 5 machine,... 

Laminae 4116 and Selectron 5003, were found to be satisfactory and interchangeable for use in these compns. These expls are thermally stable, relatively insensitive to mechanical shock, and have a brisance approaching that of Comp C-3. Weight-drop impact tests indicate them to be of the order of sensitivity of TNT... 

Pentaerythritol tetranitrate (PETN) (3) is a powerful explosive which exhibits considerable brisance on detonation (VOD 8310 m/s at = 1.77 g/cm ). It is the most stable and least reactive of the common nitrate ester explosives. The relatively high sensitivity of PETN to friction and impact means that it is usually desensitized with phlegmatizers like wax and the product is used in detonation cord, boosters and as a base charge in detonators. Pentaerythritol tetranitrate can be mixed with synthetic polymers to form plastic bonded explosives (PBXs) like detasheet and Semtex-IA. A cast mixture of PETN and TNT in equal proportions is known as pentolite and has seen wide use as a military explosive and in booster charges. The physical, chemical and explosive properties of PETN commend its use as a high explosive. 

Haishokuyaku (Gray Powder). A dark-gray, non-toxic exp cornpni No 1 Mixture con sisted of Amm Perchlorate 76.9, RDX 17.0, silicon carbide 1.3 paraffin 4.8% relative Power Brisance greater than for PA, but it is less sensitive to impact and friction. Used in Army Standard Demolition Blocks No 2 Mixture consisted of Amm Perchlorate 48, GuN (Guanidine Nitrate) 20, RDX 25 paraffin 5%. It was a commercial mining expl, and also used in Army Demolition Blocks (Rsf 1 p 28 R.ef 5, pp 365-66)... 

MF or LA. It possesses an advantage of combining a high brisance with comparatively low sensitivity. Usually it is recognized that a HE possessing a very high brisance (eg PETN, RDX or NG) is more sensitive to impact, friction or initiation than the less bn sane exp Is, such as TNT, Another important characteristic of EDNA is its relatively low explosion temp, approaching that of MF or NG. No other HE is known which has such a low sensitivity to impact and at the same time so readily explodes by heat... 

Explosive Compositions for Oil Well Gun Perforators. Expl charges consisting of the Pb Salt (I) of ethylene din itramine or in combination with other heat stable propellants are suitable for deep well operations. This compd does not spontaneously explode under about 300° and it is a relatively powerful expl by itself. Low impact and friction sensitivity, moderate power or brisance, produces large vols of gas, high flash point Ref A.O. Franz, USP 2708623(1955) CA 49, 14326(1955)... 

Liempt deVriend(Ref 3) conducted studies on the expin of CS2- NO, CS2-NzO and of CS2-N20- N0 mixts. The expl props of a mixt of CS2 N02, called "Myrite , was investigated by Bain(Ref 5) but due to its relative sensitivity to rifle bullet impact and its relatively low rate of deton brisance was not considered favorably as a military expl. The flammability of CS2 in mixts of air water vapor was studied by Zabetakis Jones(Ref 14) who found that the min amt of O reqd for the mixt at 100° latm press is 7.6% by vol. According to Roedler(Ref 9), the danger of expln fire is great in the use and storage of CS2 (See also Refs 1,2 8)... 

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