Fibre spinning illustration

Fibre tensile properties have their own importance, however, long before they arc embodied in any end product. For example, the spinning limits illustrated in Section 3.1.2 take account only of fiber linear density and effective length. 

Th principal uit of DMF is as a solvent in the spinning of acrylic and polyureihana fibres. This is a specialised outlet but illustrates the solvent power of OMF for polymers of high molacular weight. 

The effect of the presence of 2-ethyl-1-hexanol in the polymer solution is illustrated in the graphs shown in figures 20 and 21. The results shown in the graphs are for seven pairs of fibres prepared using seven sets of spinning conditions. The fibres in each set were prepared under the same spinning conditions except those shown in gray had no additive in the polymer solution, while those shown in black had 2-ethyl-1-hexanol present at a concentration of 2 wt % of the solvent in the polymer solution. 

Figure 20 shows the methane permeate flux obtained for the pairs of hollow fibres, and Figure 21 shows the carbon dioxide permeate flux obtained for the pairs of hollow fibres. The graphs shown in Figures 20 and 21 illustrate that in most cases the presence of 2-ethyl-1-hexanol in the polymer solution used for spinning the fibres causes an increase in both the methane and carbon dioxide permeate flux of the resultant fibres. The fourth pair of fibres shown in Figure 20 actually shows the reverse effect. 

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