Tetrahydrofuran (THF) is co the most universal and common solvent for many plastics. However, each plastic has its own solubility properties. Amorphous (non-crystalline) plastics (for example, polystyrene and polycarbonate) are more soluble in common organic solvents. However, even THF will not dissolve many highly crystalline plastics like nylons and polyolefins.
