Abstract
In this paper, salen (Al) complex catalytic system was synthesized and used in the polymerization of lactide. The salen (Al) complex catalytic system was characterized by infrared spectroscopy (IR), and nuclear magnetic resonance spectroscopy (NMR). The influences of different factors, including reaction time, reaction temperature, and the ratio of lactide/Al3+ on the synthesis of polylactide were also described in the investigation. The results showed that the complex catalytic system could be successfully applied in the ring opening polymerization. The optimum condition of the ring opening polymerization of lactide, which included lactide/Al3+ (mol/mol) ratio of 300, reaction temperature of 140 °C, and reaction time of 12 hours.
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