Then, the as-spun
fibers were undergone extraction of solvent and heat stretching to total draw ratio of 96.
The carbonized fibers had twice the surface area and higher thermal conductivity compared to the as-spun
Table 1 - properties of as-spun
and drawn copolyetherester-EPDM TPV fiber
PTT fiber exhibited an unoriented amorphous state in a wide angle X-ray diffraction (WAXD) image.
As much solvent has been separated from the as-spun
gel fibers when quenched to room temperature, only residual PB in the gel fiber is extracted to obtain precursor fibers.
fluorescent PLA fibers were then drawn with a TF100 parallel drawing machine (Suzhou Tefa Electromechnical Technology Development, China).
fibers were collected with a spin draw ratio of 3 using a methanol gelation bath maintained at -50[degrees]C.
18] reported that the crystalline orientation factor of as-spun
fiber was 0.
HDPE fibers were heat drawn through heated glycerol at 83 [+ or -] 2[degrees]C to a ratio of 18X.
Table 2 also shows the effect of drawing on the as-spun
treated and untreated yarns.
Metrics used include the calculated as-spun
fiber circularity, fiber surface roughness using scanning electron microscopy (SEM), structure of as-spun
and drawn fibers by wide angle X-ray diffraction (WAXD), and tensile properties of drawn precursor fibers.
The fiber formation of polyamic acid precursor does involve chemical reactions: a cyclization reaction in the as-spun
fibers takes place along the spinning path at high temperature.