| Titre : |
Identifying variations in cross-linked epoxies |
| Type de document : |
texte imprimé |
| Auteurs : |
Kiersten M. Smith, Auteur ; Thomas D. Lazzara, Auteur ; Raymond H. Fernando, Auteur |
| Année de publication : |
2022 |
| Article en page(s) : |
p. 18-22 |
| Langues : |
Multilingue (mul) |
| Catégories : |
Adhésifs -- Propriétés mécaniques
Adhésifs -- Propriétés thermiques
Analyse mécanique dynamique
Epoxydes
Humidité -- Absorption
Réticulation (polymérisation)
|
| Index. décimale : |
668.3 Adhésifs et produits semblables |
| Résumé : |
The thermal and mechanical properties of an epoxy resin are derived from the structure and chemistry of its cross-linked network. Dynamic mechanical analysis can be used to measure transition temperatures of epoxies, including the primary transition : the glass transition temperature. Secondary transitions can provide additional insights into the structure property of epoxies. |
| Note de contenu : |
- Materials and methods
- Thermomechanical evaluation of an epoxy
- Epoxy transition temperatures measured by DMA
- Effect of temperature on primary and secondary transitions
- Reversible solvent absorption
- Table 1 : Some commercially available epoxies tested (purchased at online retailer in pre-packaged cartridges or small bottle products)
- Fig. 1 : Thermomechanical analysis of a type A (left) and B epoxies (right). Type B epoxies have secondary transitions
- Fig. 2 : Type B epoxies have secondary transitions, which are apparent when applying peak deconvolution techniques (Igor Pro software used for data processing)
- Fig. 3 : The type A epoxy (ID5, Table 1) was mixed at different ratios to demonstrate that the primary transition changes with A:B ratio. Schematic representation of a cross-linked network, from bottome to top : excess part A (resin) to excess part B (hardener)
- Fig. 4 : A type B epoxy was exposed at different temperatures showing that the secondary transition peak eventually merges with the primary transition peak
- Fig. 5 : Epoxies of type A and type B exposed to boiling water for 1 h to evaluate if moisture absorption can be detected by DMA measurements |
| En ligne : |
https://drive.google.com/file/d/10T9KnsKTwYgXKQXugJX-IevwhT9pewis/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=38007 |
in ADHESION - ADHESIVES + SEALANTS > Vol. 19, N° 3/2022 (2022) . - p. 18-22
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