Synthesis, Characterization and Dyeing Application of Heterocyclic Polymers in Nylon and Polyester

Abstract

Various 4-Arylazo-1,3-benzenediamine (AABs) dyes have been synthesized and polycondensed with Toluene 2,4-diisocyanate (TDI). The resultant polyureas (PUs) have been characterized by elemental analysis, IR spectroscopy and number average molecular weight (), estimated by non-aqueous conductometric titration. Thermal properties of PUs have been examined. Their dyeing performance on nylon and polyester gives yellow to orange shades with moderate to good light and wash fastness. Polymerization of AABs with TDI on dyed nylon and polyester has also been performed. The dyeing properties of simple AAB dyes were compared with the dyes polymerized on nylon and polyester.

Keywords:

• Infrared spectra (IR)
• Number average molecular weight (Mn)
• Nylon
• Polyester fibres
• Polymerizable dyes
• Polyureas
• Thermogravimetry analysis (TGA)

ACKNOWLEDGMENT

The authors are thankful to Sardar Vallabhbhai National Institute of Technology, Surat for providing the research facility. They are also thankful to Prof. H. S. Patel for providing instrumental facilities and valuable guidance for the application.