| 摘要 |
FIELD: fiber production. SUBSTANCE: invention, in particular, relates to extrusion-solution preparation technology in the synthesis of poly[benzo(1,2-di: 4,5-di)bis-thiazole-2,4-diyl]-1,4-phenylene consisting in polycondensation of terephthalic acid with 2,5-diamino- 1,4-benzenedithiol in polyphosphoric acid, wherein content of phosphorus oxide is maintained in the range of 88.8-93.3% in the beginning of reaction and 85.3-88.5% at the end. Polycondensation is carried out until concentration of polymer in solution is 5.5-13.0 wt %. EFFECT: intensified and simplified process. 2 tbl |
