1. A new strategy for the synthesis of modified novolac resin and its polymer/clay nanocomposite.
- Author
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Mohammad-Rezaei, R., Massoumi, B., Abbasian, M., Eskandani, M., and Jaymand, M.
- Subjects
NANOCOMPOSITE materials ,COMPOSITE materials ,NANOSTRUCTURED materials ,NANOFABRICS ,BARRIER properties of polymer clay - Abstract
A novel epoxy nanocomposite composed of epoxidized novolac (ENR), epoxidized polystyrene (EPSt), and nanoclay was fabricated and characterized successfully. For this purpose, the novolac was epoxylated using a substitution nucleophilic reaction between hydroxyl group of novolac and chlorine group of epichlorohydrin. The EPSt was synthesized through the oxidizing of an allylated PSt (All-PSt). A mixture of ENR (70 wt%), EPSt (20 wt%) and Cloisite® 20A (5 wt%) was cured using ethylenediamine (EDA; 5 wt%) to afford a C-ENR-EPSt/clay nanocomposite. The transition electron microscopy (TEM) as well as powder X-ray diffraction (XRD) analysis revealed that the fabricated nanocomposite has an exfoliated structure. As the thermal property studies results, the addition of EPSt as well as Cloisite® 20A has synergistic effect on the thermal stability of the ENR resin. [ABSTRACT FROM AUTHOR]
- Published
- 2019
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