The present invention by a method and a method of obtaining a using a polyhydric alcohol as an initiator is 3 or more and glycolide by copolymerizing ε- caprolactone, and a simple process lactones glycolide / ε- caprolactone having a molecular weight of the copolymer in a high yield having a star-type (star-shaped) molecular structure produced a weight average molecular weight of 30,000 or more biodegradable glycolide / ε- caprolactone relates to a copolymer.; A lactone of a star-shaped manner caproic glycolide / ε- produced according to the present invention the copolymer is prepared of fibers having excellent physical properties can be melt viscosity of the radiation at a temperature in the manufacture less fiber, compared to a linear copolymer of the same molecular weight It is possible. That is, since the workability is excellent in flexibility and strength is superior can be only suited for use as a material of the suture as wide as bioabsorbable materials, agricultural chemicals or pharmaceuticals, sustained release of the drug matrix, agricultural film, etc. applications.
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