| abstract |
The objective of the present invention is to provide a biodegradable material that has improved flexibility and increased percentage of shape recovery after the material has been deformed. The present invention provides a biodegradable material resulting from a polyvalent compound (A) having at least three functional groups (X) such as hydroxyl groups and a polyvalent compound (B) having at least three functional groups (Y) such as carboxyl groups being chemically crosslinked by means of a condensation reaction, and when the number of functional groups (X) that are not condensed to functional groups (Y) is x, the number of functional groups (Y) that are not condensed to functional groups (X) is y, the number of chemical crosslinks is z, the weight average molecular weight of polyvalent compound (A) is MA, and the weight average molecular weight of polyvalent compound (B) is MB, when MA ≥ MB, the value of (y+z)/(x+z) is 1.2-4.0, and when MA < MB, the value of (x+z)/(y+z) is 1.2-4.0. |