Authors:Roberta Peila, J. Seferis, T. Karaki, and G. Parker
Three types of commercially available organophilic Montmorillonite (Cloisite 30B, 25A and 15A) were used to prepare VARTM
epoxy resin nanocomposites in order to study the effect of the nanoclay organophilic modification on the epoxy matrix. The
morphology of the dispersions was investigated through XRD and TEM analyses. The thermal stability of the nanocomposites was
studied by means of HI-RES TG measurements and the influence of the nanoclay on the viscosity of the resin was investigated
through rheological measurements. It was found that the nanoclay modification had no significant influence on the dispersion
and on the thermal properties of the nanocomposites. Areas of exfoliated and intercalated morphology were observed. The viscosity
of the resin furthermore did not exceed the critical value of the infusion process.
Authors:Roberta Peila, S. Lengvinaite, G. Malucelli, A. Priola, and S. Ronchetti
In this work a commercially available organophilic Montmorillonite (Cloisite 30B) was modified by interaction with different
surfactants, namely dodecylsuccinic anhydride (DSA), octadecylamine (ODA), octadecanoic alcohol (ODOH) and octadecanoic acid
(ODAc), in order to increase its basal spacing and to achieve a better dispersibility in LDPE. The morphology of the dispersions
was investigated through XRD and TEM analyses. Intercalation phenomena were found for all the systems investigated. The thermal
properties of the obtained nanocomposites were studied by means of DSC and TGA measurements. No variation of Tm and crystallinity of LDPE was found after the addition of the nanoclays (5 mass/mass%). A significant increase of the air
thermal stability of LDPE was achieved in the presence of the modified nanoclays.