Glycolic acid copolymer and method for production thereof

The present invention comprises: (a) glycolic acid monomer units, 80 mol% or more than 95 mol%, (b) other than glycolic acid monomer units, hydroxycarboxylic acid monomer units, 5.0 to 20.0 mol%, and (c) diglycolic acid monomer units 0 0.10 the sum of including mole% and the components (a), (b) and (c) is 100 mol%, wherein the acid monomer wherein the hydroxycarboxylic acid monomer units other than the units (b) are each independently The average chain length of the plurality of segments to be displayed as an average number of one or more of the hydroxycarboxylic acid monomer unit (b) the hydroxycarboxylic acid by constructing a plurality of segments consisting of acid monomer unit (b) is 1.00 to 1.50 , weight average molecular weight of 50,000 or more to provide a glycolic acid copolymer. Glycolic acid, diglycolic acid, hydroxycarboxylic acid monomer, a copolymer, a segment