Dual Functionalization with Isobutyric Anhidride and Cyclohexyl Isocyanate of Polystyrene

This study contains chemical modification of polystyrene with isobutyric anhydride in Lewis acid catalyst [BF3.O(C2H5)2] environment. It has been used Friedel-Crafts reactions for modification. The determined optimum condition was used for this reactions. Modified polystyrene containing acyl group has been modified with cyclohexyl isocyanate in the presence of n-BuLi catalyst for the second time. The molecular structure of polystyrenes containing acyl and amide groups obtained by these reactions was clarified using spectroscopic methods and the amount of carboxyl group bound to polystyrene as a result of modification was determined as volumetric. In addition, second modification yields were determined according to the results of elemental analysis. In each of the 6 styrene units in the new type of polystyrene chain containing different functional groups, 3 of them had amide functional group, 1 had acyl functional group and 1 had no functional group. Both functional groups that bind to polystyrene will contribute to further expansion of the application areas of polystyrene