Copolymer of lactone and carbonate and process for the preparation of such a copolymer
AssigneeRijksuniversiteit te Groningen
InventorsDirk W. Grijpma, Erik Kroeze, Atze J. Nijenhuis, Albertus J. Pennings
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Abstract
A copolymer of a lactone and a polycyclic carbonate is prepared by heating a monomer of a lactone with a polycyclic carbonate having two cyclic structures including a carbonate group at elevated temperatures less than 200 degrees Centigrade in the presence of a catalyst. The described copolymers evidence excellent mechanical properties, good resorption velocity and do not disintegrate upon degradation into materials of high crystallinity.
Claims17
Copolymer of a lactone and a polycyclic carbonate having at least two ring structures, each of which includes a carbonate group.
A copolymer obtained by copolymerization of at least one lactone and at least one cyclic carbonate, characterized in that the carbonate is polycyclic having at least two ring structures, each of which includes a carbonate group and in that the copolymer has a tensile strength of at least 630 MPa.
Process for the polymerization of a copolymer of a lactone and a polycyclic carbonate which comprises heating a monomer of a lactone and a polycyclic carbonate having two cyclic structures that include a carbonate group at a temperature less than 200.degree. C. for a time period ranging from 30 minutes to two weeks in the presence of a catalyst at a monomer to catalyst ratio ranging from 1000:1 to 300,000:1.
Dependencies are inferred from the claim text.