Abstract
The thermal degradation of a highly chlorinated paraffin, (Cl 70% w/w)(CP), used as a fire retardant additive for polymers, has been studied by TG, DTA and TVA. The main volatile degradation product is HCl which is eliminated in two steps. To 60–70% dehydrochlorination an apparent zero order reaction occurs with a detectable rate from 250°C, probably initiated at labile chlorine atoms. The apparent activation energy of the process is 40 kcal/mole. A charred residue containing 35% chlorine is obtained. This residue undergoes nearly complete dehydrochlorination in the range 300–600°C.
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