Fiber structure development

Kim, K.H., Cho, H.H., Ito, H., Kikutani, T., 2008. Fiber structure development in high-speed melt spinning of poly(trimethylene terephthalate) (PIT)—on-line measurement of birefringence. J. Polym. Sci. B Polym. Phys. 46, 847 56. 

With purpose to clarify the role of the applied strain stress on the fibers structure development it was interesting to realize the above-described experiment without the mentioned limitations. 

T.Kitukani,J.Radhakrishnan,S.Arikawa,A.Takaku,N.Okui,X.Jin,F.Niwaand Y. Kudo (1996), High-speed melt spinning of bicomponent fibers Mechanism of fiber structure development in poly(ethylene terephthalate)/polypropylene system,/. Appl. Polym. Sci.,62,1913-1924. 

N., Niwa, F., and Kudo, Y, High-Speed Melt Spinning of Bicomponent Fibers Mechanism of Fiber Structure Development in Polyfethylene tere-phthalate)/Propylene System , Journal of Applied Polymer Science, 62, 1913-1924, 1996. 

For increased power requirements, electrode constructions have been developed which bring the electronic conductors in closer contact with the active material particles first, around 1930, the sinter electrode [110], recently in sealed cells largely replaced by the nichel-foam electrode, and then, around 1980, the fiber structure electrode [111]. In order to take full advantage of their increased perform-... 

Processing, Properties and Structural Development of Polymer-derived Fiber-reinforced SiC... 

For thermal protection during reentry from space, Dornier manufactured some model shingles from SiC/SiC and C/SiC. Fig. 13 shows two shingles each reinforced with two beads. For these parts a special prepreg was developed which had a 2.5 D fiber structure and enabled easy forming by autoclave tools to be carried out. 

Table 1. Micropore structure development during steam activation for CFCMS monoliths manufactured from P-200 carbon fibers.

Figure 11.14 Effect of applied strain on the 002 d-spacing of a PTT fiber drawn at 3.3 x measured by WAXD [76], Reprinted from Polymer, 42, Wu, J., Schultz, J. M., Samon, K. M., Pangelinan, A. B. and Chuah, H. H., In situ study of structure development in poly(trimethylene terephthalate) fibers during stretching by simultaneous synchrotron small- and wide-angle X-ray scattering, 7141-7151, Copyright (2001), with permission from Elsevier Science...

Table 13.1 Intrinsic viscosity and molecular weight data for the three characterized polymers (cf. Figure 13.2) [13]. From Some effects of the rheological properties of PET on spinning line profile and structure developed in high-speed spinning , Perez, G., in High-Speed Fiber Spinning, Ziabicki, A. and Kawai, H. (Eds), 1985, pp. 333-362, copyright (1985 John Wiley Sons, Inc.). Reprinted by permission of John Wiley Sons, Inc.

These results suggest that pure aromatic polyesters may function like the long-lived components in humus and may provide useful properties as a soil additive. Grass sod growing studies using municipal-waste-derived compost in combination with chopped plastic fibers demonstrated improved growing rate and root structure development to accelerate sod production. 

Fig. 14.5 Morphological model of structures developed in as-spun HDPE. Take-up velocities are (a) very low (b) low (c) medium and (d) high. [Reprinted by permission from J. E. Spruiell and J. L. White, Structure Development during Polymer Processing Studies of the Melt Spinning of Polyethylene and Polypropylene Fibers, Polym. Eng. Set, 15, 660 (1975).]...

J. R. Dees and J. E. Spmiell, Structure Development During Melt Spinning of Linear Polyethylene Fiber, J. Appl. Polym. Sci. 18, 1053 (1974). 

Lommerts BJ, " Structure development in polyketone and polyalcohol fibers", PhD Thesis, Groningen (1994). 

In general, it is recognized that there are multiple cellular and molecular responses to asbestos fibers, that no single mechanism is likely to account for all asbestos-related diseases, that the precise steps in pathogenic pathways leading to asbestos-related disease are not fiilly established, and that fiber structural and chemical properties (e.g., length, width, iron content, durability, surface areas) are important variables that play a role in the development of lung and pleural injury. 

In fine animal fibers, e.g., Merino wool, the structure develops solely from cuticle and cortical cells, but with increasing diameter a third type of cell becomes more prominent in the follicle. The medulla is formed from an axial stream of cells which do not become densely packed with protein or develop highly asymmetric shapes. By contrast the cell contents shrivel up during dehydration leaving a series of vacuoles along the fiber axis. 

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