Synthesis of Polycaprolactones Using Heterogeneous Catalysts
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초록
내용
Polylactones are important biodegradable and biocompatible polyesters, provide special mechanical properties that would be useful for polyurethane synthesis. A series of polycaprolactone (PCL) polyols have been synthesized via a one-pot solvent-free ring-opening polymerization of ε-caprolactone using a heterogeneous catalyst. Various initiators such as ethylene glycol, propylene glycol, glycerol, and sorbitol have been employed to control the structure and properties of the PCLs. The resultant polymers were characterized by nuclear magnetic resonance spectroscopy and gel permeation chromatography. PCLs of well-defined hydroxyl functionality with controlled molecular weight of 980–9900 g mol−1 and dispersity of 1.2–2.0 were successfully achieved. The polymerization kinetics were also investigated to understand the reaction mechanism.