The present research focused on the development of a fully bio-based elastomeric epoxy and its clay nanocomposites. An epoxidized castor oil (ECO) was cured with a dimer diamine as curing agent in a solvent-less procedure. Cure kinetics were monitored with infrared spectroscopy. Mid-IR and near-IR analyses were performed to follow all reactions during the curing process.  Networks were reinforced with organically modified montmorillonite (OMMT) nanoclay. The degree of dispersion and affinity of the clay with the resin components and cured networks were assessed by XRD patterns and settling experiments.  Both bio-resins showed good compatibility with the chosen organoclay. The x-ray diffraction patterns and the physical appearance of the specimens were consistent with successful dispersion of the organoclay in the cured networks.  Mechanical and swelling properties were also studied. ECO/dimer diamine networks appear promising for hydrophobic elastomer nanocomposite applications.<br/>

Elastomeric bioepoxy/clay nanocomposites

251st National Meeting (2016)

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