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Synthesis and Characterization of Functionalized Polystyrene Using ATRP with Strong Base Technique

This paper deals with a simple method for the synthesis of functionalised polystyrene using ATRP and strong base chemistry. The α, Ω- dihydroxy terminated polystyrene (OH-PSt-OH) and α, Ω- diamine terminated polystyrene (NH2-PSt-NH2) were prepared by reacting α, Ω- Dibromo terminated polystyrene (Br- PSt-Br) with Potassiumhydroxide and Sodamide respectively. The synthesized polymers are characterized by different techniques. The Infrared (IR) spectrum confirms the formation of -OH and -NH2 as end group. The weight average molecular weight (Mw) of the synthesized polymer is determined by 1 H NMR end group analysis, gel permeation chromatography (GPC) and mass spectrometric technique and found to be around 2000 g/mol. Thermogravimetric analysis (TGA) showed single stage decomposition cantered at 400 o C. The Tg value of the polymers is determined using Differential Scanning Colorimetric (DSC) method and found to be in the range from 58 to 60°.