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Article Dans Une Revue Macromolecules Année : 2002

A Scaling Theory of the Competition between Interdiffusion and Cross-Linking at Polymer Interfaces

Résumé

We study theoretically situations where competition arises between an interdiffusion process and a cross-linking chemical reaction at interfaces between pieces of the same polymer material. An example of such a situation is observable in the formation of latex films, where, in the presence of a cross-linking additive, colloidal polymer particles initially in suspension come at contact as the solvent evaporates, and, optimally, coalesce into a continuous coating. We considered the low cross-link density situation in a previous paper (A. Aradian, E. Raphael, P.-G. de Gennes, Macromolecules 33, 9444 (2000)), and presented a simple control parameter that determines the final state of the interface. In the present article, with the help of simple scaling arguments, we extend our description to higher cross-link densities. We provide predictions for the strength of the interface in different favorable and unfavorable regimes, and discuss how it can be optimized.

Dates et versions

hal-00010088 , version 1 (09-10-2005)

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Achod Aradian, Elie Raphael, Pierre-Gilles de Gennes. A Scaling Theory of the Competition between Interdiffusion and Cross-Linking at Polymer Interfaces. Macromolecules, 2002, 35, pp.4036-4043. ⟨hal-00010088⟩

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