A quantitative measure of the degree of fibrillation of short reinforcing fibres

The degree of fibrillation of a reinforcing fibre can be viewed as the extent to which the fibre has partially been split longitudinally into thinner fibrils. Fibrillation provides larger surface area and improves matrix-to-fibre coupling, oil absorption, thickening characteristics, and softness of...

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Veröffentlicht in:Journal of materials science 1990-08, Vol.25 (8), p.3659-3663
Hauptverfasser: HENN, A. R, FRAUNDORF, P. B
Format: Artikel
Sprache:eng
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Zusammenfassung:The degree of fibrillation of a reinforcing fibre can be viewed as the extent to which the fibre has partially been split longitudinally into thinner fibrils. Fibrillation provides larger surface area and improves matrix-to-fibre coupling, oil absorption, thickening characteristics, and softness of the fibre. Fibrillation also allows for low bulk density and assists them at-making capability of the fibre. A general means for quantifying the degree of fibrillation of a fibre is proposed. Taking the squared ratio of the fibre surface area determined by the BET method to that determined by measuring a sampling of many particles in a scanning electron micrograph, the technique for which is described gives a quantitative, relatively simple method for calculating the degree of fibrillation. Results for calcium sodium metaphosphate fibre, milled glass fibre, and wollastonite fibre are compared. Benefits of fibrillation are discussed. 10 refs.
ISSN:0022-2461
1573-4803
DOI:10.1007/BF00575401