| 摘要 |
A polymer having a satisfactory balance between in vivo degradability and satisfactory mechanical properties, which is an A<1>BA<2 >type polymer comprising a segment A<1 >and a segment A<2 >each having a modified amino acid and a segment B consisting of polyethylene glycol with a number-average molecular weight of 8000 or higher bonded at one end to the segment A<1 >and at the other end to the segment A<2>, and has a number-average molecular weight of 10000 to 600000; an in vivo degradable material which comprises the polymer; and a film for preventing tissue adhesion, an artificial dura mater, a suture, an implant preparation, or a sustained-release drug base each comprising the degradable material.
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