Effect of the chemical grafting of epoxy resin onto organomodified montmorillonite on the structure and heat resistance of an epoxy nanocomposite

Autor:	S. V. Cherdyntseva, Sergey N. Chvalun, M. A. Shcherbina, S. V. Krasheninnikov, I. V. Levakova, S. N. Drozd, V. V. Nikolaev, A. P. Korobko
Rok vydání:	2011
Předmět:	Nanocomposite Materials science Polymers and Plastics Epoxy Grafting Exfoliation joint chemistry.chemical_compound Montmorillonite chemistry Aluminosilicate Covalent bond visual_art Materials Chemistry visual_art.visual_art_medium Composite material Glass transition
Zdroj:	Polymer Science Series A. 53:75-84
ISSN:	1555-6107 0965-545X
DOI:	10.1134/s0965545x11010032
Popis:	It is shown that the noncatalyzed chemical grafting of an epoxy oligomer onto the surface of montmorillonite platelets may proceed via the reaction between the epoxy groups and the hydroxyl groups of the organic modifying agent of the layered aluminosilicate. The effect of grafting on the structure and heat resistance of the cured epoxy nanocomposite is studied. Complete exfoliation of montmorillonite particles into individual platelets is shown to be a necessary but insufficient condition for increasing the glass-transition temperature of the nanocomposite relative to that of the initial matrix. A much higher contribution to the increase in the glass-transition temperature is ensured by grafting of epoxy molecular chains onto the surface of aluminosilicate platelets; i.e., strong covalent matrix-aluminosilicate bonds form in addition to physical bonds, a process that entails development of a thicker three-dimensional network.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::5a8c37eb11807f09174b8f4f87baffc2 https://doi.org/10.1134/s0965545x11010032 Zobrazit plný text záznamu Full text from SpringerLink