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 |
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Hauptverfasser: | , |
Format: | Artikel |
Sprache: | eng |
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Online-Zugang: | Volltext |
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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. |
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ISSN: | 0022-2461 1573-4803 |
DOI: | 10.1007/BF00575401 |