| Titre : |
Fiber length distribution in twin-screw extrusion of fiber-reinforced polymer composites : A comparison between shear extensional mixing |
| Type de document : |
texte imprimé |
| Auteurs : |
M. Guo, Auteur ; X. Li, Auteur ; Joao M. Maia, Auteur |
| Année de publication : |
2021 |
| Article en page(s) : |
p. 350-357 |
| Note générale : |
Bibliogr. |
| Langues : |
Anglais (eng) |
| Catégories : |
Caractérisation
Composites à fibres -- Extrusion
Composites à fibres de carbone
Composites à fibres de verre
Composites à fibres longues
Composites à fibres polymères
Compoundage
Extrudeuse bi-vis
Polyéthylène glycol
Polyéthylène téréphtalate
Polypropylène
Résistance à la traction
|
| Index. décimale : |
668.4 Plastiques, vinyles |
| Résumé : |
New extensional mixing elements (EME) for twin-screw extrusion were applied to compound glass fibers (GF), carbon fibers (CF) or polyethylene terephthalate fibers (PETF) reinforced polymer composites with polymer matrix of polypropylene (PP) or polyethylene oxide (PEO) and the resulting fiber degradation upon processing was evaluated and compared with compounding via shear flow-dominated kneading blocks (KB). Composites structures were characterized in terms of fiber length and distribution, and cumulative length ratio, at five locations along the mixing zone. Although significant fiber breakage was achieved for both configurations, it was markedly lower in composites processed using the EME, because whereas the high shear stress kneading motion in the KB degrades fibers significantly, fiber breakup is significantly minimized by the alignment induced by the EME prior to flow in the high-stress regions. |
| Note de contenu : |
- Materials
- Compounding
- Characterization
- Table 1 : Aspect ratio (AR), tensile strength (TS), and initial length (L0) of the fibers; number average fiber length (Ln) and weight average fiber length (Lw) of the five composites processed through the KB and the EME screw configurations (at position E)
- Table 2 : Number average fiber length (Ln) and weight average fiber length (Lw) of PP/GF and PP/CF composites at different locations of the mixing zone of the KB and the EME screw configurations
- Table 3 : Number average fiber length (Ln) and weight average fiber length (Lw) of HPEO/PETF and LPEO/PETF composites at different locations of the mixing zone of the KB and the EME screw configurations |
| DOI : |
https://doi.org/10.1515/ipp-2020-3978 |
| En ligne : |
https://drive.google.com/file/d/1ED81O8focju1aRW51xcjizVHorqwRS7w/view?usp=shari [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=36707 |
in INTERNATIONAL POLYMER PROCESSING > Vol. 36, N° 4 (2021) . - p. 350-357
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