| 摘要 |
PROBLEM TO BE SOLVED: To solve the problem that ring-opening polymerizable monomers remain in a polymer composition obtained by mixing, and thereby physical properties of the polymer composition are degraded, because in a polymer obtained through polymerization of a ring-opening polymerizable monomer, such as polylactic acid, an equilibrium relationship is satisfied between the polymer and the ring-opening polymerizable monomer, consequently, in the case where a plurality of polymers are heated to a degree of melting points thereof and mixed in order to form stereo complex crystals, a ring-opening polymerizable monomer is generated as a result of a depolymerization reaction.SOLUTION: The polymer composition of the present invention containing stereo complex crystals contains substantially no organic solvent, and has a remaining ring-opening polymerizable monomer amount of 2 mol% or less, which is smaller compared to a conventional polymer composition obtained by heating and mixing. Therefore, the polymer composition has an effect that the degradation of the physical properties thereof due to an influence of remaining ring-opening polymerizable monomers can be suppressed. |
