PVC plastic identification method
Time：2012-11-03 12:51:02 Hits：1769
PVC plastic identification method
(1) Identification of burning: the softening or melting temperature range: 75 to 90 ° C; combustion: difficult to soften; burning flames state: on the yellow under green smoke; away after the fire: from the fire extinguished; Odor: pungent smell . This method is the most simple and direct as the preferred general.
(2) solvent treatment identification: Solvent: tetrahydrofuran, cyclohexanone, ketones, dimethylformamide; non-solvent: methanol, acetone, heptane.
Suspected PVC plastic Add more solvents, it was observed to determine whether the dissolution of the plastic for the PVC. The solvent is heated, the effect will be more obvious dissolved.
(3) the proportion method: the PVC specific gravity of 1.35 to 1.45, generally 1.38.
By the proportion of the difference or the method of determination of specific gravity, the distinction between the PVC and other plastics.
