Triethanolamine → L-lactide epsilon-caprolactone

Participants

Reaction Conditions

Reaction Steps

The copolymer was prepared by copolymerizing a 74/26(molar) mixture of l-lactide and ε-caprolactone under dry nitrogen atmosphere in the presence of triethanolamine as initiator, monomer/initiator ratio of 2,220 and stannous octanoate as a catalyst at monomer/catalyst of 10,000. After melting the comonomers and mixing with the catalyst and initiator, the temperature was raised to 140° C. and reaction was continued for 60 hours. The polymer was isolated, ground and purified by distilling the residual monomer under reduced pressure. The purified polymer was characterized as described for P1 to P6 and pertinent analytical data are shown in Table III.

Provenance & Evidence