Using a microscope-television-video camera system, the diffusion coefficients of blend acrylic polymer dopes in the coagulation of a wet spinning process are determined in both dimethylformamide and aqueous NaSCN solvent systems, along with the effects of various dispersing polymers and their composition and content (blend ratio) on the diffusion coefficients. The relationship between the diffusion coefficients and the microporous structure is discussed.
Get full access to this article
View all access options for this article.
References
1.
Asahi Chemical Industry Co. Ltd., Jpn. Kokai, 52, 107325 (1977), 52, 114725 (1977), 54, 68415 (1979).
2.
Booth, J.R., Diffusion Limited Coagulation in Wet Spun Single Filaments, Appl. Polym. Symp.6, 89 ( 1967).
3.
Brunaur, S., "The Adsorption of Gases and Vapors," Princeton University Press, 1945, p. 153.
4.
Craig, J.P., Knudsen, J.P., and Holland, V.F., Characterization of Acrylic Fiber Structure, Textile Res. J.32 (6), 435 (1962).
5.
Epstein, M.E. and Rosenthal, A.J., Spinning of Polyamide from H2SO 4 Solution—Polymer Solution and Coagulation Mechanisms, Textile Res. J.36 (9), 813 (1966).
6.
Fukui, T., and Sekiguchi, T., Water Absorbent Acrylic Fiber "DUNOVA," Sen-I Gakkaishi36 (8), 313 (1980).
7.
Gou, M.M., Koros, W.J., and Goldman, G.W., Dimethyl Acetamide Sorption Equilibria in a Urethane/ Urea/Ether Block Copolymer , J. Appl. Polym. Sci.43, 11 (1991).
8.
Komatsu, G., and Bukyo, S., [I]-I Moisture and Water Absorption Improvement, J. Jpn. Res. Assoc. Textile End-Uses23 (9), 359 (1982).
9.
Koros, W.J., et al., Polymeric Membrane Materials for Solution-Diffusion Based Permeation Separations. Prog. Polym. Sci.13, 4, 339 (1988).
10.
Kundsen, J.P. , Influence of Coagulation Variables on the Structure and Physical Properties of an Acrylic Fiber, Textile Res. J.33, 13 (1963).
Liu, Z., Qin, J., et al., Effect of Coagulation Conditions on the Structure and Properties of Acrylic Blend Fibers, Synthet. Fiber Ind. ( in Chinese) 3, 11 (1986).
13.
Luo, C., et al., "Experimental of Physical Chemistry," People's Education Press, Beijing, 1979, p. 60.
14.
Paul, D.R., Diffusion During the Coagulation Step of Wet Spirining, J. Appl. Polym. Sci.12, 383 (1968).
15.
Paul, D.R., Spinnability in the Wet-Spinning of Acrylic Fibers, J. Appl. Polym. Sci.12, 2273 (1968).
16.
Qin, J., TheEnhancement of Microvoids in Acrylic Fibers, J. Appl. Polym. Sci.44, 1095 (1992 ).
17.
Qin, J., Liu, Z., Yang, M., Mao, P., and Li F., Relation between Microporous Structure of PAC/AS Blend Fibers and Sequence Distribution of AS Copolymers, Textile Res. J.57(8), 433 (1987).
18.
Takahashi, M., and Watanabe, M., Relation between Coagulating Forces of Spinning Baths and Properties of Fibers, Sen-I Gakkaishi15, 951 (1959), and The Effect of Solvent Content in the Coagulation Bath on the Filament Formation, Sen-I Gakkaishi16, 243 (1960).
19.
Takizawa, A. , Diffusion of Acetic Acid in Direct Wet Spinning of Triacetate, Sen-I Gakkaishi17, 397 ( 1961 ), and Diffusion of the Solute in Wet Spinning of Acrylic Fiber , Sen-I Gakkaishi17, 397 (1961).
20.
Terada, K., Structure Formation of Acrylic Fibers, 4: Diffusion During the Coagulation Process of Wet Spinning of Acrylic Fibers, I: Mathematical Approach, Sen-I Gakkaishi29 (8), T-338 ( 1973), and Structure Formation of Acrylic Fibers, 5: Diffusion During the Coagulation Process of Wet Spinning of Acrylic Fibers, II: Relation between the Mutual Diffusion in the Filament and the Structure Formed, Sen-I Gakkaishi 29 (8), T345 (1973).
