Interfaces, Confinement, Matériaux et Nanostructures - ICMN

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Accueil > Recherche > Systèmes Nanostructurés et Confinés > Thématiques de Recherche > Nanostructuration de polymères

Confinement effect

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Crystallization

We study the influence of the confinement (thickness) and processing parameters of the films (withdrawal speed, evaporation rate) on the crystallization of polymers.

Examples of PLA film surface morphologies showing the decrease in crystal structure density as the withdrawal speed increases (from left to right and top to bottom)


Swelling properties

In the form of thin films, the swelling properties of polymers in solvent vapors may be different from the ones of bulk polymers. We study the swelling of thin films of polymers in a controlled atmosphere, using in situ thickness measurement devices. The swelling property of the films are then correlated with the polymer / solvent affinity.

Example of swelling of biobased oligomers (derived from glycerol) in THF vapors. The swelling ratio is related to the affinity of the solvent for the polymers.


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