Interdiffusion of polymers in microlayers can be utilized to increase the concentration of inorganic particles in one of the component layers.  When microlayers of linear low density polyethylene (LLDPE) and low density polyethylene are annealed into the melt, a moving boundary effect is observed as the more mobile linear LLDPE chains diffuse more quickly into the slowly diffusing branched LDPE chain layers.  This particle concentration effect was observed, while utilizing high aspect ratio clay platelets dispersed in LLDPE, to increase the gas barrier properties of the polymer system through an increase in path tortuosity for the diffusing penetrant.  Through this process it was apparent that multilayered systems with a small amount of high aspect ratio filler can be engineered to reflect gas barrier properties of systems with much larger filler content.  The effect of particle coalescence on gas barrier properties of low Tg phosphate glass multilayered systems was also investigated.

Multilayered nanocomposites with high aspect ratio platelets/low T<sub>g</sub> phosphate glass: Controlled interdiffusion and improved gas barrier properties

243rd National Meeting (2012)

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Multilayered nanocomposites with high aspect ratio platelets/low Tg phosphate glass: Controlled interdiffusion and improved gas barrier properties

Multilayered nanocomposites with high aspect ratio platelets/low T_g phosphate glass: Controlled interdiffusion and improved gas barrier properties