Fiber length distribution

Fig. 6. Fiber length distribution for (a) a long sample (group 4) and (b) a short sample (group 7) of chrysotile successive length classes separated by 50 p.m.

The fiber length distribution is determined by the following three stages in processing ... 

A discontinuous fiber composite is one that contains a relatively short length of fibers dispersed within the matrix. When an external load is applied to the composite, the fibers are loaded as a result of stress transfer from the matrix to the fiber across the fiber-matrix interface. The degree of reinforcement that may be attained is a function of fiber fraction (V/), the fiber orientation distribution, the fiber length distribution, and efficiency of... 

Glass fiber diameter can also affect the physical properties. In general, fiber diameters from 6-17. im have been used in PBT, with the narrower fibers giving slightly better properties. However, fiber length distribution and fiber content may play a more important role than diameter [32], Fiber content in a PBT composite is often measured by specific gravity and by ash content. Both of these measurements need to be corrected in cases where the blend is pigmented or combined with other materials. 

Fiber Length Distribution, for industrial applications, the fiber length and length distribution are of primary importance because they are closely related to the performance of the fibers in matrix reinforcement. Representative distributions of fiber lengths and diameters can be obtained through measurement and statistical analysis of microphotographs fiber length distributions have also been obtained recently from automated optical analyzers. 

Fig. 11.29 Fiber-length distribution of MOS and feeding protocol for MOS-filled PP containing ethylene-propylene copolymer. [Reprinted by permission from Y. Suetsugu, The Effect of Mixing on Some Properties of Compounds and Composites, in Mixing and Compounding of Polymers, I. Manas-Zloczower and Z. Tadmor, Eds., Hanser, Munich, 1994.]...

The wet process enables a narrower fiber length distribution to be obtained for amphibole asbestos. In this process the asbestos fibers are separated from the rock in the crushed mixture by using a hydrocyclone and the longer and shorter fibers separated with a rotary sieve. 

Tang, C., and Heindel, T.J. (2007), Effect of fiber length distribution on gas holdup in a cocurrent air-water-fiber bubble column, Chemical Engineering Science, 62(5) 1408-1417. 

Figure 8.7 Fiber length distributions obtained from various precursors. Units X-axis in mm. Y-axis in %. Source Reprinted from Benissad F, Gadelle F, Coulon P, Bonnetain L, Influence of catalyst precursor on the lengths of vapor grown carbon fibers, Proc Int Conf Carbon, Newcastle upon Tyne, 307-309, 1988.

Fig. 18.5 Fiber length distribution in rayon-PP composite injection molded test bar with 25% fiber content, 3 mm cut length during processing...

Izod is insensitive to the glass content. The reduction of melt viscosity and fiber length distribution with the increase of glass fiber concentration is also reported by Barbosa and Kenny (124). 

Fiber length distribution of injection molded 30 wt% short and long glass fiber reinforced polypropylene. (Reproduced based on the data of reference 54.)... 

Vas L M, Ronkay F, Czigany T (2009) Active fiber length distribution and its application to determine the critical fiber length, Polym Test 28 752-759. 

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