Tetrahydrofuran polyvinylchloride

Analytical grade NaCl, polyvinylchloride (Aldrich, high mol. wt.), bls(2-ethylhexyl)phtalate (GR, Aldrich), and tetrahydrofuran (AR, BDH Chemicals) were used without further purification. Polyacrylic acid, mol. wt. 250,000 (Aldrich) was titrated with NaOH to obtain a stock solution of NaPAA of known carboxylate concentration. 

Fig. 47. Absorption spectrum of thermally degraded polyvinylchloride (Vestolit SK 55), polyvinylbromide and a copolymer vinyl chloride—isobutene in tetrahydrofuran. The absorption maxima correspond to polyene sequences with n = 4, 5, 6, etc. [ 184 ].

Plastic toys 1 g of the sample is dissolved with 10 mL of an appropriate solvent, for instance acetone for acrylonitrile butadiene styrene (ABS), dichloromethane for polystyrene (PS) and tetrahydrofuran for polyvinylchloride (PVC) in an ultrasonic bath. 10 mL of methanol is added to the solution and shaken. The methanol phase is centrifuged, applied to SPE clean-up and concentrated. 

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