Polyesters crosslinked nanocomposites

Figure 9.1 TEM micrographs of crosslinked polyester nanocomposite containing 2.5 wt% clay showing (a) microstructure at low magnification, (b) intercalated and exfoliated...

Fig. 17 X-ray scattering profiles for organically modified montmorillonite clay (Closite 30B) and crosslinked polyester nanocomposites containing 1, 2, 5, and 10wt% clay. Reprinted from (2002) Polymer 43 3699 [158] with permission...

R.K. Bharadwaj, A.R. Mehrabi, C. Hamilton, C. Trujillo, M. Murgs, R. Fan, A. Chavira, and A.K. Thomson, Structure-properties relationships in crosslinked polyester-clay nanocomposites, Polymer, 2002, 43 3699-3705. 

Structure-property relationships in crosslinked polyester-clay nanocomposites, prepared by dispersing methyl tallow bis-2-hydroxyethyl quaternary ammonium chloride-modified montmorillonite in prepromoted polyester resin and subsequently crosslinking using the methylethylketone peroxide initiator at room temperature and at several clay concentrations, were analyzed by X-ray diffraction combined with Transmission Electron Microscopy (TEM), thermal (TGA) and dynamic mechanical analyses as well as by the determination of mechanical and optical properties [158]. In all cases the formation of a nanocomposite and the morphology of a dispersion of intercalated/exfoHated aggregates of clay sheets in the resin matrix were confirmed (Fig. 17). hi the absence of reflection irrespective of clay concentration in the scattering curves for all the polyester-clay nanocomposites was ascertained. 

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