CHARACTERIZATION OF PVC BY SEC .2. ONE SHOT CHROMATOGRAPHY OF THE ORGANIC-COMPONENTS OF PVC COMPOUNDS

1,2,4-Trichlorobenzene at 90 oC proved to be a universal solvent for the common organic components of PVC compounds except crosslinked impact modifiers. Size exclusion chromatography was carried out with 8 different components, with a PVC-U compound and plate out formed during its extrusion using both RI and IR detection. In the RI detector PVC shows a very low detector response. It is therefore possible to analyze the whole organic fraction of the compound without prior precipitation of PVC. Using RI/IR double detection, an “one shot” analysis of the PVC matrix and of all the soluble additives can be accomplished. © 1990, Taylor & Francis Group, LLC. All rights reserved.