[article]
| Titre : |
Studies on the blends of epoxy and different liquid rubber |
| Type de document : |
texte imprimé |
| Auteurs : |
Ranjana Yadav, Auteur ; Deepak Srivastava, Auteur |
| Année de publication : |
2009 |
| Article en page(s) : |
p. 65-86 |
| Note générale : |
Bibliogr. |
| Langues : |
Anglais (eng) |
| Catégories : |
Alliages polymères
Caoutchouc
Epoxydes
|
| Index. décimale : |
667.9 Revêtements et enduits |
| Résumé : |
Epoxy resins, either glycidyl epoxy or non-glydidyl epoxy resins, reacted with a large number of chemical species called curatives or hardeners. Optimum performance properties can be obtained by cross-linking the epoxy resins into a three dimensional and infusible network. The choice of curing agent depends on processing method, curing conditions, i.e., curing temperature and time,physical and chemical properties desired, toxicological and environmental limitations and cost.
But, like other thermosetting resins, the brittleness of epoxy resin is a major deficiency in many applications. To overcome this deficiency of epoxy resins, many attempts have been made to blend them with reactive liquid rubbers such as carboxyl and amine terminated butadiene acrylonitrile rubber (CTBN and ATBN). The properties of epoxy/CTBN or epoxy/ATBN systems, especially their mechanical properties, have been intensively studied, and results have proved that. With an appropriate weight of rubber, the rubber modified resins have strongly improved toughness. In this way, carboxyl-terminated copolymer of butadiene and acrylonitrile (CTBN) has been used by various workers with diglycidyl ether bidphenol A (DGEBA) epoxy resins.
Blend samples containing 0-25 wt% CTBN were prepared according to the procedure simular to that adopted by ting. The calculated quantity of epoxy resin wss, firstly, stirred at 120°C for 1 h to entrap all air bubbles from the resin, the calculated quantity of polyamine was added and stirred to get a clear homogeneous mixture. |
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in PAINTINDIA > Vol. LIX, N° 4 (04/2009) . - p. 65-86
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Studies on the blends of epoxy and different liquid rubber in PAINTINDIA, Vol. LIX, N° 4 (04/2009)
