IMPROVING NYLON FABRIC PROPERTIES VIA GRAFTING BY A NEW PROPOSED REDOX INITIATION SYSTEM

Abstract

The original work presented in this thesis was undertaken to improve nylon fabric properties via grafting with acrylonitrile monomer by a new proposed redox initiation system using potassium persulphate (KPS) as a main oxidizing agent in conjunction with sodimn bisulphite (SBS) or benzaldehyde sodium bisulphite adduct (BSBS) as reducing agents. Optimization conditions for grafting including the concentration of the redox system components, polymerization time and temperature, liquor ratio, monomer concentration were studied. The produced grafted nylon and ungrafted nylon fabrics were characterized using IR, thennogravimetric analysis and differential scanning calorimetry. Also mechanical properties including, thickness, wettability, air and water permeability besides bursting strength were examined and discussed.

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The dyeabillity and fastness properties of the grafted nylon fabric with two different classes of dyes (disperse and direct) and the optimal conditions of dyeing, pH values, temperature and time of dyeing, liquor ratio and dye concentration were studied in relation to the ungrafted nylon fabric.