Author(s):
1. Mirjana Jovičić, Univerzitet u Novom Sadu, Tehnološki fakultet, Novi Sad, Serbia
2. Jelena Pavličević, Serbia
3. Oskar Bera, Serbia
4. Vesna Teofilovic, Univerzitet u Novom Sadu, Tehnološki fakultet, Novi Sad, Serbia
5. Milan Asurdžić, Univerzitet u Novom Sadu, Tehnološki fakultet, Novi Sad, Serbia
6. Radmila Radicevic, University of Novi Sad, Faculty of Technology, Serbia, Serbia

Abstract:
Improvement of thermal stability and mechanical properties of an epoxy/amine system can be achieved by addition of organically modified montmorillonite (MMT). Depending on the nature of the organic ions intercalated in the interface, the modified MMT can catalyze curing reaction, or react with prepolymer or crosslinking agent. Epoxy hybrids with different montmorillonite were prepared using in-situ procedure. In the first step, montmorillonite was added to epoxy, and the mixing was performed in ultrasound bath at 45 °C. Then, crosslinking agent Jeffamine D-400 was added to the mixture. A series of epoxy/Jeffamine D-400 samples with different montmorillonite content (0, 3, 5 and 10 wt. %) were prepared. The curing of obtained modified systems was carried out by differential scanning calorimetry (DSC), using dynamic regime at three different heating rates: 5, 10 and 20 °C/min. According to the obtained DSC data, it can be noticed that the temperature of maximum curing rate was decreased by increasing montmorillonite content, followed by the change of DSC curves shape. Based on obtained values for kinetic parameters, it is determined that MMT presence affects the mechanism and curing kinetics of epoxy/amine systems.

Key words:
epoxy nanocomposites,organically modified montmorillonite,curing kinetics

Thematic field:
SYMPOSIUM A - Science of matter, condensed matter and physics of solid states

Date of abstract submission:
14.06.2015.

Conference:
Contemporary Materials 2015 - Savremeni Materijali

Applied paper from author