Synthesis and Characterization of Novel Colored Polyurethanes

摘要

Azo disperse dyes containing N,N-diethylol group have been prepared and each dye was polycondensed with 4,4'-Diphenyl methane diisocyanate.The resultant colored polyurethanes were characterized by nitrogen content,IR spectral studies,number average molecular weight (Mn),estimated by nonaqueous conductometric titration,and thermogravimetry.The electrical conductivity of all the polyurethanes was measured at room temperature.