| Titre : |
Semi-crystalline, and yet thermoformable : Special polymers enable thermoforming of PEKK parts |
| Type de document : |
texte imprimé |
| Auteurs : |
Philippe Bussi, Auteur ; Pierre Gonnetan, Auteur ; Eleonore Möller, Auteur ; Bernd Opinkowski, Auteur |
| Année de publication : |
2020 |
| Article en page(s) : |
p. 44-46 |
| Langues : |
Anglais (eng) |
| Catégories : |
Matières plastiques -- Propriétés mécaniques
Matières plastiques -- Thermoformage
Polyaryl éther cétones
Polyéthers cétone cétone
Polymères semi-cristallins
|
| Index. décimale : |
668.4 Plastiques, vinyles |
| Résumé : |
Ultra high performance polymers such as polyaryletherketones (PAEK) are typically not thermoformable for thick gauge applications because of their semi-crystalline nature. Specially developed PEKK grades now allow processing in this method. These can be used to produce large semi-crystalline PAEK parts with large wall thickness exhibiting extreme mechanical, chemical and flame retardant properties. |
| Note de contenu : |
- Challenges for PEAK thermforming
- ESCR test shows high chemical resistance
- Lighter and cheaper PEKK components
- Fig. 1 : PEKK copolymers contain both terephthalic (T) and isophthalic (I) monomers. The ratio and distribution of the monomers significantly determines the properties of the plastics
- Fig. 2 : Amorphous PEKK sheet : to thermoform PAEK components, sheets or films must first be extruded that remain amorphous even at a thickness of several millimeters
- Fig. 3 : Amorphous thermoformed PEKK final part
- Fig. 4 : Results of an ESCR test after one week of full immersion at room temperature and a load of 40MPa at 1.1% strain : semi-crystalline PEEK has the best chemical resistance of all polymers
- Fig. 5 : Semi-crystalline thermoformed PEKK part. The process allows the production of highly chemical-resistant components at lower costs
- Fig. 6 : Semi-crystalline thermoformed PEKK electronic tray |
| En ligne : |
https://drive.google.com/file/d/17y2a8ylxfA31RTZo5MJAe3KSlukEuggw/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=34942 |
in KUNSTSTOFFE INTERNATIONAL > Vol. 110, N° 10 (2020) . - p. 44-46
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