Fiber draw ratio

Figure 7 SEM photographs of peeled back surfaces of PEI-TLCP blend fibers. Draw ratio is 4 (x 2000). The amount of PEsI in the blends are (A) 0 phr, (B) 0.75 phr, and (C) 3.75 phr. Source Ref. 11.

Figure 6. Stress strain curve for polyester 4.4 -0 = 0.15 (nr. BB1) fiber. Draw ratio = 500. 1) as-made. 2) Heat treated at 235°C for 3 hr.

Young s modulus GPa Gel-spun fibers draw ratio 22 at 200°C 45 (35)... 

Fibers comprised of polypropylene matrix reinforced with 50 wt.% VB fibrils were processed up to a fiber draw ratio of 220. The reinforcement was developed in situ using a dual extrusion fiber spinning process. The dual extrusion process not only allowed the processing of polymers with widely different melting temperatures but also allowed continuous streams of the TLCP to be introduced into the PP and maintained in the drawn extrudate. The tensile properties of the fibers increased with... 

Figure 5. Effect of PEsI on tensile strength of 75/25 PEI/LCP blend fibers (draw ratio 12).

An introduction of PSF into the PPS/LCP blends may selectively increases the viscosity of the PPS phase in the processing temperature range. Hence, the elongational deformation of the dispersed LCP domains would be promoted on account of adequate matching of viscosity ratio of LCP to matrix phases. In consequence, the mechanical properties of the PPS/LCP blend fibers (draw ratio 3) are enhanced by introducing PPS as shown in Figure 17 (refer to Kim, B.C. Hong,... 

Figure 2.57. Melting curves of as-spun and drawn PEN fiber (draw ratio = 5.2) as can be seen, the as-spun fiber is amorphous, and the crystalUnity of the drawn fiber is 50% on the basis of the heat of fusion [From Saw et al. (1997) reprinted with permission of Society of Plastics Engineers],...

Low fiber draw ratio High fiber draw ratio... 

Soroudi, A., Skrifvars, M., Liu, H., 2011. Polyaniline-pol)fpropylene melt-spun fiber filaments the collaborative effects of blending conditions and fiber draw ratios on the electrical properties of fiber filaments. J. Appl. Polym. Sci. 119 (1), 558-564. http //dx.doi.org/10.1002/ app.32655. 

Table 8.46. Properties of Drawn Multifilament PFA Fiber (Draw Ratio 1 75)( i...

Electrical conductivities for the C2 fibers after oxidation and doping gave reproducible values of 150 S/cm, which is lower than the 350 S/cm observed for CI fibers. The presence of voids in Cl fibers most likely facilitates easier diffusion of dopants throughout the fiber, resulting in higher conductivities, while lesser voids and non-uniform oxidation give lower conductivity values for C2 fibers. Draw ratios in excess of 2 should dramatically increase the conductivity, and we are investigating methods to uniformly oxidize the C2 fibers to attain maximum conductivity. However, these conductivity values... 

It is quite evident that drawn fibers or films will display anisotropic conductivity, with conductivity parallel to the stretch direction (a( )) higher than that perpendicular to it (stretch ratio to values of the stretch ratio of about 5, after which it levels off. Figs. 9-6b and 9-6a above show typical dependencies of conductivity on draw ratio for two CPs. Anisotropy of conductivity and its relation to fiber draw ratio is most dramatic for certain forms of P(Ac). For instance for stretch ratios of 3.0, 5.0 and 20.0, for Shirakawa-, solvent-free- and Durham-P(Ac) respectively, values of the anisotropy (a( ))/([Pg.242]

Table 8.4 Summary of mechanical properties for PP and composite samples as a function of nanotube concentration and fiber draw ratio...

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