Oxygen Barrier Properties of Poly(ethylene terephthalate) Nanocomposite Films

Abstract

Nanocomposites of poly(ethylene terephthalate) and two different montmorillonite‐based organoclays were prepared by a co‐rotating twin screw extruder. Dispersion of nanoclays in the polymer matrix was examined by TEM and XRD. Nanocomposites with lower content of organoclay showed exfoliated morphology while by increasing the amount of organoclay the intercalated morphology was more prevalent. Both organoclays had a good intercalation with PET and were uniformly dispersed within the polymer. Oxygen permeability of thin films of nanocomposites showed that the nanocomposites had better oxygen barrier properties than the neat PET. Tensile and impact properties of the nanocomposites also were measured.magnified image

Effect of an Organo-Modified Montmorillonite on the Barrier Properties of PET Nanocomposites Using a Polyester Ionomer as a Compatibilizing Agent

“…Optimal mixing conditions and adequate surface treatment of silicates should be applied to prepare exfoliated nanocomposites [12][13][14][15][16] . The use of polymers containing polar functional groups and/or ionomers as compatibilizers also promotes the dispersion of silicates and may lead to intercalated and/or exfoliated nanocomposites [17][18][19][20][21] .…”

Thermal degradation kinetics of PET/SWCNTs nanocomposites prepared by the in situ polymerization

“…Significant properties improvement of the polymer-matrix composites (PMCs) depends mainly on: the size and shape of nanofiller, surface area, degree of surface development, surface energy and the spatial distribution of the nanoparticles in the polymer matrix. The enhanced properties usually exhibited by such materials can significantly expand the potential applications of PET [10]. Apart from mechanical properties and processability, thermal properties and resistance to thermal degradation can be improved by the addition of appropriate nanoparticles [11][12][13].…”

“…During second stage, when temperature is higher, the remaining nanotubes along with the residues of the first stage are burned. 10,20, ) methods were applied to TG data to obtain kinetic parameters (activation energy, Arrhenius constant at 600 K and A factor) and Criado method to kinetics model analysis. In this kinetic model, energy activation is increasing with the increase of nanotubes concentration.…”

A study of organo-modified clay type on pet-clay based nanocomposite properties

“…Nanocomposites use low filler content (usually <5%) and many studies reported poor miscibility between the organic and inorganic components, leading to agglomeration of the latter, and therefore, weaker materials at higher particle rates [6,19]. Some of the researchers determined the advantages in the mechanical, thermal or optical properties between 1-3% clay usage [3,8,10,12,20]. Therefore, in this study, the clay amount was fixed at 3%.…”

“…We set out to investigate the influence of clay type on the surface and internal structure, morphology and thermal properties of the PET-clay composite master batch. In literature, Kim [7], Litchfield et al [8], Scaffaro et al [9], Frounchi et al [10], Barber et al [11], Wang et al [12] and Solis et al [13] studied clay-PET nanocomposite production by melt intercalation method and they worked on the effect of clay amount on nanocomposite properties, particularly clay dispersion in PET polymer matrix and tensile properties. Gashti et al [14] researched the effect of clay type on dyeability of nanocomposites.…”