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Influence of Hydrolysis Conditions on Curing and Properties of an Epoxy-Silane Based Hybrid Material (CROSBI ID 517876)

Prilog sa skupa u zborniku | izvorni znanstveni rad

Macan, Jelena ; Ivanković, Hrvoje Influence of Hydrolysis Conditions on Curing and Properties of an Epoxy-Silane Based Hybrid Material // International Conference MATRIB 2006. Book of Abstracts / Grilec, Krešimir (ur.). Zagreb: Hrvatsko društvo za materijale i tribologiju (HDMT), 2006. str. 99-104-x

Podaci o odgovornosti

Macan, Jelena ; Ivanković, Hrvoje

engleski

Influence of Hydrolysis Conditions on Curing and Properties of an Epoxy-Silane Based Hybrid Material

3-glycidyloxypropyltrimethoxysilane (GLYMO), an organically modified methoxysilane with a reactive epoxy group linked to silicon atom through a stable Si-C covalent bond, was hydrolysed with varying amounts of water and acid or base catalyst. Reaction was followed by Fourier-transform infrared spectroscopy (FTIR), and it was found that larger content of water and acid conditions favour quick hydrolysis, while in basic conditions hydrolysis proceeds in parallel with condensation of siloxane network. After hydrolysis, epoxy groups were crosslinked with a poly(oxypropylene) diamine, Jeffamine D230, to form an organic-inorganic hybrid material, and the heat of reaction was determined by differential scanning calorimetry (DSC). Epoxy groups have remained stable during hydrolysis, and hydrolysed silanol groups can act as catalysts for the epoxy-amine reaction. Early inorganic condensation in base-catalysed systems can sterically hinder full crosslinking of the organic phase, while presence of chloride ions from acid catalyst (hydrochloric acid) adversely influences thermal stability of such hybrid materials, as determined by thermogravimetric analysis (TGA). Mechanical properties of fully cured hybrid materials were determined by nanoindentation, and glass transition temperature was determined by DSC. Systems hydrolysed with larger amounts of water show poorer mechanical properties, while the most significant improvement in mechanical properties was achieved for an acid-catalysed system.

epoxy-amine resin; mechanical properties; organic-inorganic hybrids; sol-gel

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Podaci o prilogu

99-104-x.

2006.

objavljeno

Podaci o matičnoj publikaciji

International Conference MATRIB 2006. Book of Abstracts

Grilec, Krešimir

Zagreb: Hrvatsko društvo za materijale i tribologiju (HDMT)

Podaci o skupu

MATRIB 2006 - Materials, Tribology, Processing

poster

22.06.2006-24.06.2006

Vela Luka, Hrvatska

Povezanost rada

Kemijsko inženjerstvo