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Synthesis of Base Polymers (Polymers 1 to 3) 

Base polymers were prepared by combining suitable monomers, effecting copolymerization reaction thereof in tetrahydrofuran (THF) solvent, pouring the reaction solution into methanol for crystallization, repeatedly washing with hexane, isolation, and drying. The resulting polymers, des- ignated Polymers 1 to 3, were analyzed for composition by $^{1}$H-NMR spectroscopy, and for Mw and Mw/Mn by GPC versus polystyrene standards using THF solvent. 

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## Synthesis Example 

Polymer 1 

Mw~7,600 

Mw/Mn~ 1.73 

