Methods for Improving Gas Barrier Properties of Polymers

XRD and TEM results, a mixed morphology including tactoids, and intercalated and exfoliated silicate layer structures 

In another study, PET nanocomposites containing imidazolium-modified montmorillonite were synthesized by in situ polymerization. XRD and TEM results revealed the coexistence of large aggregates and intercalated silicate layers for the synthesized nanocomposites [31]. 

Food and beverage producers require distributing their products all over the world. This increases the time interval between production and consumption of the products. The 

Blending with high-barrier polymers is another approach to increase barrier properties of polymers like PET or polyolefins [40-42]. Yeo et al. [42] prepared a blend of polypropylene (PP)/ethylene-vinyl alcohol copolymer (EVOH) (85/15) using a single-screw extruder. Oxygen permeability of biaxially 

Introducing impermeable lamellar fillers with high aspect ratio in the polymer matrix is another method to enhance barrier properties [46-51]. A tortuous path is created in the polymer matrix due to the presence of the impermeable silicate layers. The impermeable obstacles force the gas permeant to travel a longer path to penetrate through the film and, consequently, the permeability decreases. Permeability is the product of diffusion and solubility. The kinetic aspect of 

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