[article]
| Titre : |
Bonding composites and other structures |
| Type de document : |
texte imprimé |
| Auteurs : |
John Dubber, Auteur |
| Année de publication : |
2011 |
| Article en page(s) : |
p. 36-38 |
| Langues : |
Américain (ame) |
| Catégories : |
Adhésifs structuraux
Assemblages collés
Collage structural
Composites -- Collage
Epoxydes
Polyacryliques
Polyuréthanes
Silanes
SiliconesLes silicones, ou polysiloxanes, sont des composés inorganiques formés d'une chaine silicium-oxygène (...-Si-O-Si-O-Si-O-...) sur laquelle des groupes se fixent, sur les atomes de silicium. Certains groupes organiques peuvent être utilisés pour relier entre elles plusieurs de ces chaines (...-Si-O-...). Le type le plus courant est le poly(diméthylsiloxane) linéaire ou PDMS. Le second groupe en importance de matériaux en silicone est celui des résines de silicone, formées par des oligosiloxanes ramifiés ou en forme de cage (wiki).
|
| Index. décimale : |
668.3 Adhésifs et produits semblables |
| Résumé : |
Structural bonds are used to join critical load-bearing parts of an assembly. The adhesive technology for such bonding replaces (or in some cases, augments) methods such as riveting, welding or mechanical fastening with bolts and screws. It is worth noting that adhesive and other joining methods can work together. While adhesive bonding provides sufficient strength, the addition of a few appropriately placed rivets provides instant alignment, jigging and clamping advantages.
To meet the requirements of structural applications, suitable adhesives must have a combination of high shear, tensile and peel strength, along with maximum stress, impact, and shock absorbent capabilities. Because this particular set of criteria is not always easy to combine, structural adhesives feature a range of differing product characteristics and chemistries. In addition, they are designed to bond a diverse selection of materials, including composites, wood, metal and glass.
Structural adhesives also provide benefits over conventional methods of joining that include reduced weight, improved fatigue resistance, uniform stress distribution and the ability to join dissimilar materials. In many instances, less critical tolerances can be specified because of the gap-filling capability of many structural adhesives. Structural adhesives can fall into five technologies: epoxies, acrylics, polyurethanes, modified silanes and silicones. Why is such a variety needed, and where is each adhesive used? |
| Note de contenu : |
- Examining epoxies
- Polyurethane possibilities
- Mulling over modified silanes
- Silicone suitability
- Acquiring assistance |
| En ligne : |
http://www.adhesivesmag.com/Articles/Feature_Article/BNP_GUID_9-5-2006_A_1000000 [...] |
| Format de la ressource électronique : |
Web |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=11940 |
in ADHESIVES & SEALANTS INDUSTRY (ASI) > Vol. 18, N° 7 (07-2011) . - p. 36-38
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