| 摘要 |
PURPOSE: A polylactide block copolymer is provided to have excellent physical property, to have excellent color, and to have excellent flexibility. CONSTITUTION: A polylactide block copolymer includes 5-40 wt% of polyalkyleneglycol and 60-95 wt% of lactide, and has a number average molecular weight of 20,000-300,000 dalton. The sodium ion content of the polyalkylene glycol is 0-130 ppm. The polyalkylene glycol is one or more selected from polyethylene glycol, polyalkylene glycol, polypropylene glycol, polyoxyethylene-polyoxypropylene glycol copolymer, polytetramethylene glycol, and polytetramethylene ether glycol.
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