The reaction of poly(vinyl chloride) (PVC) with various aliphatic amines in 1,4-dioxane has been studied. These reactions led to the formation of new polymers (PVC-L), which were characterized by different spectroscopic methods: differential thermal analysis (DTA) and infrared. The extraction percentages were determined by comparing the initial conductivity of the aqueous solution containing the studied metal with the final conductivity of the aqueous solution at extraction equilibrium. One of the obtained polymers gave an extraction rate of 82.05% for Li+, which underlines the importance of the substitution of chlorine atoms by diethylenetriamine groups. A kinetic study of the extraction shows that the optimal duration of extraction was obtained with the polymer most substituted by diethylenetriamine groups.

The paper describes the chemical modification of PVC consisting in the introduction of amino groups (1,4-dioxane, diethylenetriamine), and then cross-linking with dichlorodiethyl ether. The optimal extraction time was obtained for the polymer that had more chlorine atoms substituted with diethylenetriamine groups and ether. The obtained polymers were characterized by infrared spectroscopy (FTIR), elemental analysis (CHN) and differential thermal analysis (DTA).