摘要 |
The invention concerns polymer powder comprising 2-(4-amino phenyl)-5(6) amino phenyl benzimidazole (DAPBI), paraphenylene diamine, and terephthaloyl dichloride, capable of being dissolved in a solvent system comprising (i) N-methyl-2-pyrrolidone (NMP) or dimethylacetamide (DMAC) and (ii) an inorganic salt; wherein said polymer is capable of being redissolved in said solvent system after said polymer has been removed from said solvent system.
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