Pyrolysis-Gas Chromatography/Mass Spectrometry and Size Exclusion Chromatography of Tackifiers

Abstract

  Tackifiers marketed for pressure sensitive adhesives were analyzed by pyrolysis-gas chromatography/mass spectrometry (Py-GC/MS) and size exclusion chromatography (SEC). The tackifiers studied were two coumarone-indene resins, nine C5 petroleum resins, three C9 petroleum resins, a C5/9 petroleum resin, four kinds of terpene resin, six kinds of rosin ester and a hydrogenated hydrocarbon resin. Their typical total ion chromatograms, characteristic pyrolysates and size exclusion chromatograms were reported.
  A rubber-based pressure sensitive adhesive was extracted with acetone and viscous substance was obtained after evaporating the solvent. The viscous substance was then analyzed by Py-GC/MS and SEC. Comparing the obtained chromatograms with the chromatograms of the tackifiers, a C5 petroleum resin and a rosin ester were identified.