| 摘要 |
FIELD: chemistry.SUBSTANCE: described is a method of obtaining poly-para-dioxanon in a monomer mass under the action of tin (II) octanoate in the presence of a co-initiator, which are introduced in the form of a solution in an organic solvent; the solvent is removed by vacuumisation, polymerisation is carried out with heating in nitrogen atmosphere; the obtained polymer is cooled, crushed and purified from the residual monomer; characterised by the fact that as the co-initiator used are glycidyl ethers and esters, benzene is used as the solvent, removal of the solvent is carried out at room temperature and pressure not more than 0.5 mm Hg, polymerisation is performed in a thin layer at 80°C, the polymer is cooled to room temperature and purified from the residual monomer by the monomer distillation under pressure of 0.1-0.5 mm Hg at 80°C for 12 hours or re-precipitation.EFFECT: obtaining poly-para-dioxanon with logarithmic viscosity, suitable for monofilaments.1 tbl, 9 ex |
