Method of synthesizing polylactic acid and catalyst thereof
AssigneePlastics Industry Development Center
InventorsChen-Yu Li, Po-Han Li, Yu-Li Lee
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Abstract
A compound of formula (1), wherein R1, R2, R3 are defined in the disclosure. The compound of formula (1) is used as a catalyst for lactide polymerization to reduce the temperature and the time of the polymerization reaction, thereby producing polylactic acid (PLA) having high molecular weight. The present invention also provides a method of preparing the compound of formula (1) and a method of synthesizing polylactic acid that is catalyzed by the compound of formula (1).
Claims19
A compound having a structure of formula (1),
- wherein
- R1 is selected from a group consisting of hydrogen and a hydrocarbon functional group with a number of carbon atoms from 1 to 9;
- R2 is selected from a group consisting of a hydrocarbon functional group with a number of carbon atoms from 1 to 9;
- R3 is hydrogen or chlorine.
A method of synthesizing polylactic acid (PLA), comprising:
- performing a ring-opening polymerization of lactide in a presence of a catalyst having a structure of formula (1) to synthesize PLA,
- wherein R1 is selected from a group consisting of hydrogen and a hydrocarbon functional group with a number of carbon atoms from 1 to 9;
- R2 is selected from a group consisting of a hydrocarbon functional group with a number of carbon atoms from 1 to 9;
- R3 is hydrogen or chlorine.
A method of synthesizing polylactic acid (PLA), comprising:
- A) adding a ligand having a structure of formula (2),
- wherein R1 is selected from a group consisting of hydrogen and a hydrocarbon functional group with a number of carbon atoms from 1 to 9;
- R2 is selected from a group consisting of a hydrocarbon functional group with a number of carbon atoms from 1 to 9;
- R3 is hydrogen or chlorine, and a tin compound into a reaction vessel to synthesize a catalyst having a structure of formula (1),
- wherein R1 is selected from a group consisting of hydrogen and a hydrocarbon functional group with a number of carbon atoms from 1 to 9;
- R2 is selected from a group consisting of a hydrocarbon functional group with a number of carbon atoms from 1 to 9;
- R3 is hydrogen or chlorine;
- B) adding lactide into the reaction vessel to perform a ring-opening polymerization to synthesize PLA.
Dependencies are inferred from the claim text.