Synthesis of Well-Defined Three-Arm Star-Branched Polystyrene through Arm-First Coupling Approach by Atom Transfer Radical Polymerization

<div>GPC traces of (a) polystyrene precursor macromonomer, (Mn 7455 g<svg height="4.3561pt" id="M3" style="vertical-align:-0.04981995pt" version="1.1" viewbox="-0.0498162 -4.30628 3.20019 4.3561" width="3.20019pt" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"><g transform="matrix(.0135,0,0,-0.0135,0,0)"><path d="M170 255C170 288 146 313 114 313S58 288 58 255C58 221 82 198 114 198S170 221 170 255Z" id="g113-46"></path><glyph.data ascent="3473" descent="-2876" horiz-adv-x="228" vert-adv-y="228"></glyph.data></g></svg>mol<sup>−1</sup>). (b) Coupled non-end-functionalized polystyrene. (c) Crude unfractionated coupled end functionalized polystyrene. (d) Coupled end functionalized polystyrene after fractionation (Mn 21436 g<svg height="4.3561pt" id="M4" style="vertical-align:-0.04981995pt" version="1.1" viewbox="-0.0498162 -4.30628 3.20019 4.3561" width="3.20019pt" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"><g transform="matrix(.0135,0,0,-0.0135,0,0)"><path d="M170 255C170 288 146 313 114 313S58 288 58 255C58 221 82 198 114 198S170 221 170 255Z" id="g113-46"></path><glyph.data ascent="3473" descent="-2876" horiz-adv-x="228" vert-adv-y="228"></glyph.data></g></svg>mol<sup>−1</sup>).</div>

International Journal of Polymer Science

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Figure 4

Figure 4: Synthesis of Well-Defined Three-Arm Star-Branched Polystyrene through Arm-First Coupling Approach by Atom Transfer Radical Polymerization 