The cha nges in chemical structure occu ring in pol y (vinyl chloride) as a res ul t of heati ng ina vacu um in t he range 100 to 400 C wer e studied using infrared spectropho to metry. The pri ncip a l changes occ urri ng in t he residue during p yrolysis in a vacuum were the format ion of unsaturated s tructures a nd a change from a n al iphatic spectrum to one showing aroma tic absorption. The data are used to suppor t a previou sly proposed mechani sm of decomposition for poly (vinyl chloride) .
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Strömberg et al. (1958) studied this question.