Effect of Reactive Diluents and Kaolin on the Mechanical Properties of Epoxy Resin

Autor:	J. Rudecka, M. Bakar, J. Fitas, J. Szymańska
Rok vydání:	2010
Předmět:	Materials science Polymers and Plastics visual_art Materials Chemistry Ceramics and Composites visual_art.visual_art_medium Epoxy Composite material Diluent
Zdroj:	Polymers and Polymer Composites. 18:503-510
ISSN:	1478-2391 0967-3911
DOI:	10.1177/096739111001800905
Popis:	Epoxy resin was modified using phenyl diglycidyl ether (PGE), xylene and kaolin. The impact strength (IS), critical stress intensity factor (K), flexural strength and glass transition temperature (Tg) were evaluated as functions of the modifier content. It was found that the addition of diluents led to a significant reduction of both viscosity and Tg. A three-fold increase of IS was obtained with the addition of 2.5% PGE. Moreover, the addition of 15% PGE resulted in about 145% enhancement of the KC parameter. However, the addition of xylene had no significant effect on these properties. Furthermore, the addition of 10% kaolin to epoxy resin gave compositions with the highest fracture toughness. Maximum KC values were obtained with epoxy hybrid compositions containing 10% kaolin and 2.5% PGE and 10% kaolin and 5% PGE respectively. All tested compositions had higher energy at break than nonmodified epoxy resin. SEM micrographs of fractured surfaces of modified epoxy compositions revealed the presence of plastic deformations, which can be considered as the main source of the mechanical properties enhancement.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::d7fb5793b30a803adb9b5b67429a9618 https://doi.org/10.1177/096739111001800905 Zobrazit plný text záznamu