Prussian Blue Analogs as Efficient Catalysts for the Synthesis of α,ω-Primary Hydroxyl-Terminated Polyols
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A series of Prussian blue analog (PBA) catalysts was investigated for synthesizing α,ω-primary hydroxyl-terminated polyols through the ring-opening reaction of ε-caprolactone (CL). Initially, the reaction kinetics were studied to understand the reactivity differences between primary and secondary alcohols in the ring-opening of CL. Following this, CL-capped polyols were successfully synthesized using polypropylene glycol as the macroinitiator. These synthesized polyols demonstrated superior performance in polyurethane synthesis compared to the original polypropylene glycol, even without the use of a catalyst. This work presents a promising method for producing α,ω-primary hydroxyl-terminated precursors, with broad applications in the polyurethane industry.