Synthesis and Characterization of Novel Colored Polyurethanes

Abstract

SUMMARY:Polymers containing urethane units were synthesized by solution polymerization of bisphenols A, C, and F with diisocyanates viz. toluene-2,4-diisocyanate, hexamethylene diisocyanate, isophorone diisocyanate, and diphenylmethane diisocyanate, respectively. Thus obtained polymers were pale yellow amorphous powders. These polymers were characterized by infrared spectral studies and nitrogen content. The number-average molecular weights (Q) were estimated from conductometric titration and limiting viscosity number [q] in dimethyl formamide. From thermogravimetric analyses, the thermal behaviour was studied. Kinetic parameters for their degradation were computed. ZUSAMMENFASSUNG:Polymere mit Urethaneinheiten wurden durch L6sungspolymerisation der Bisphenole A, C und F mit Diisocyanaten wie Toluol-2,4-diisocyanat, Hexamethylendiisocyanat, Isophorondiisocyanat bzw. Diphenylmethandiisocyanat hergestellt. Die erhaltenen Polymeren waren blaagelbe Pulver. Diese Polymeren wurden durch IRSpektroskopie und Bestimmung des Stickstoffgehalts charakterisiert. Die zahlenmittleren Molekulargewichte (4) wurden durch Leitftlhigkeitstitration und Bestimmung der Grenzviskositiltszahl in Dimethylformamid ermittelt. Mittels Thermogravimetrie wurde das thennische Verhalten untersucht. Die kinetischen Parameter des Abbaus wurden berechnet .

Polyureas: Synthesis, Characterization and Dyeing Application in Nylon and Polyester

“…This dye can produce polyurea with diisocyanate. Thus the studies on polyureas based on these dyes have been carried off from an Indian scientist [4][5][6] . However the polymerization dyes based on one type of phenolics have been reported in literature [7] .…”