The dry-wet spinning mechanism of regenerated cellulose fibers was examined by using N-methylmorpholine N-oxide (MMNO), which is known as a good organic solvent of cellulose. The special interest was paid on the effects of an air-gap length and a draft ratio of spinning process on mechanical properties and micro-structure of regenerated cellulose fibers, so as to control the mechanical properties of the fibers. In this study, cellulose MMNO solution with high concentration and high viscosity

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... ld be made due to the good solubility of MMNO. The regenerated cellulose fibers spun from MMNO solution gave the cellulose II crystalline unit cell. The mechanical properties of the regenerated fibers were widely changed by changing the air-gap length and the draft ratio, and the high-tenacity fibers were obtained by spinning conditions of 10-50 mm of air-gaps and greater than 6 of draft ratios. The maximum modulus and tenacity in this series of the fibers were 214 g/d and 5.8 g/d, respective-ly *1 P resent address