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

Autori
Macan, Jelena ; Ivanković, Hrvoje

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
International Conference MATRIB 2006. Book of Abstracts / Grilec, Krešimir - Zagreb : Hrvatsko društvo za materijale i tribologiju (HDMT), 2006, 99-104

Skup
MATRIB 2006 - Materials, Tribology, Processing

Mjesto i datum
Vela Luka, Hrvatska, 22.06.2006. - 24.06.2006

Vrsta sudjelovanja
Poster

Vrsta recenzije
Nije recenziran

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

Sažetak
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.

Izvorni jezik
Engleski

Znanstvena područja
Kemijsko inženjerstvo

POVEZANOST RADA