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Kinetic Studies on Guanidine-Superbase-Promoted Ring-Opening Polymerization of epsilon-Caprolactone

Release time:2023-10-19| Hits:

Key Words:POLY(EPSILON-CAPROLACTONE); CATALYSTS; COMPLEXES; ALUMINUM

Abstract:The kinetics of the ring-opening polymerization of. -caprolactone with butane-1,4-diol as the initiator and 1,5,7-triazabicyclo[ 4.4.0] dec-5-ene as catalyst were examined. A highly efficient and controllable polymerization of. -caprolactone occurred with an activation energy of 22.5 kJ center dot mol-1, which is much lower than that observed with butan-1-ol as the initiator (39.5 kJ center dot mol-1). An intramolecular hydrogen- bonding-assisted mechanism is proposed to explain this lowering of the activation energy.

Volume:30

Issue:8

Translation or Not:no

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