Synthesis and characterization of some 2,4′-dibenzyldiisocyanate ionic polymers

Cationic polyurethanes were synthesized by a two step Menschutkin reaction. A prepolymer with tertiary dimethylamino end groups and a dihalide (1,3-dimethyl-4,6-di(chloromethyl) benzene) were used in the first step, and 1,8-diaza bicyclooctane in the second step. The polymers from flexible and transparent films and their solutions give ionomer dispersions by adding of acetone. The viscometric behaviour of diluted solutions was studied in solvents with different dielectrical constants.