AbstractThe present investigation considered the transfer of mass during fiber formation with the dry spinning process, both experimentally and theoretically. Experimental data taken for the dry spinning of poly(methyl methacrylate)‐benzene solutions were treated with the equation of continuity of species. Two solutions of this equation were applied to the data. The first, an analytical solution with a number of restraints and assumptions, yielded good, semiquantitative results. The other solution determined by numerical analysis with fewer restraints yielded calculated data which predicted exactly the behavior of average fiber solvent concentratio
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