[article]
| Titre : |
Relationship between structure and spinning processing of as-spun PP fibres : Systematic experimental design and quantitative result analysis using statistical methods |
| Type de document : |
texte imprimé |
| Auteurs : |
R. D. Yang, Auteur ; R. R. Mather, Auteur ; A. F. Fotheringham, Auteur |
| Année de publication : |
1999 |
| Article en page(s) : |
p. 60-68 |
| Note générale : |
Bibliogr. |
| Langues : |
Anglais (eng) |
| Index. décimale : |
668.9 Polymères |
| Résumé : |
As-spun polypropylene (PP) fibres, obtained under a one-step statistical experimental design using orthogonal arrays and involving all the common spinning parameters were studied with wide angle X-ray scattering (WAXS). The WAXS results revealed that the micro-structure of PP fibres can be altered progressively from less-ordered para-crystalline states to highly-ordered crystalline states with an a-monoclinic lattice. The degree of structural order has been evaluated quantitatively in terms of (W1/2)-1, the reciprocal ofthe half-height width ofthefirst WAXS reflection peak. On the basis of such quantitative evaluation, which is shown to be consistent with the conclusions derived from "traditional" qualitative assessment, comprehensive quantitative analysis ofthe effects ofprocessing parameters and their interactions on the degree of structural order is accomplished, using systematic but simple statistical methods. Parameters significantly affecting structure, including types of raw materials, winding speed, spinning temperature, application speed of spin finish and metering pump speed are identified, and correlation between structure and parameter setting is established in a concise statistical model. The model indicates clearly the combination of parameter levels for increasing or reducing the degree of structural order over the whole ränge from essentially amorphous to highly crystalline forms. Comparisons with the "conventional" approach of "one factor at a time" demonstrated the validity of the new approach and its significant advantages. The latter includes the economy in experiment scale, efficiency in result analysis and a comprehensive overview of the process being studied, which covers effects arising from synergistic interactions as well as from individual parameters. |
| Note de contenu : |
- Types of structure
- Structural transition and processing
- Qualitative and quantitative evaluation of structural order as a response parameter
- Statistical analysis of the effects of spinning parameters on structural order
- "Conventional" empirical analysis and comparison with the statistical analysis |
| DOI : |
10.3139/217.1517 |
| En ligne : |
https://drive.google.com/file/d/1mbL3m03bX7tV7Dd_JYau7gp7FvZ4NVPb/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=16113 |
in INTERNATIONAL POLYMER PROCESSING > Vol. XIV, N° 1 (03/1999) . - p. 60-68
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