<b>Thermal　Decomposition　Characteristics　of　Aromatic　Dinitro　Compounds </b>

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  • <b>芳香族ジニトロ化合物の熱分解特性</b>
  • 芳香族ジニトロ化合物の熱分解特性
  • ホウコウゾク ジニトロ カゴウブツ ノ ネツ ブンカイ トクセイ

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<p><tt>In　order　to　evaluate　thermal　hazards　of　aromatic　dinitro　compoullds，thermal　decompositions　of　dinitrobenzene（DNB）and　dillitrotoluene（DNT）isomers　were　carried　out　with　heating　rate　of 10℃／min，and　the　products　of　themal　decomposi-tions　were　identified　by　gas－chromatography（GC）and／or　gas－chromatography／mass　spectrometer（GC／MS）．Teir　heats of　decomposition　weYe　also　studied　by　using　diffeTential　scanning　calorimetry（DSC）． There　was　remarkable　difference　in　thermal　decomposition　mechanism　between　o－DNB　and m一DNB，also　between3， 4－DNT　and2，4－DNT．The　initlal　step　of　the　thermal　decompositions　seems　to　be　initiated　with　dissociation　of　either　ortho substituents　of　the　benzene　rlng．Th1s　resulted　in　that　decompositjon　temperature　of　o－DNB　observed　by　DSC　was　lower than　that　</tt><tt>of m一DNB．Namely，the　initlal　step　of　decomposition　was　affected　by　an　ortho　effect． On　the　other　hand，nnal　decomposltion　products　of　all　tested　compounds　were　similar，i.e. N2，CO，CO2，H20 and carbonaceous　products．Estimated　heats　of　decomposition　fmm　amounts　of　these　products　showed　very　close　values　with </tt><tt>those　obtahled　by　DSC　measurements.</tt></p>

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