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The effects of long-ranged and short-ranged forces in confined near-critical polymeric liquids

par Carelli, Claude;Jones, Richard Anthony Lewis;Young, R. N.;Cubitt, Robert;Krastev, R.;Gutberlet, Thomas;Dalgliesh, Robert;Sferrazza, Michele
Référence Europhysics Letters, 71, 5, page (763)
Publication Publié, 2005

Article révisé par les pairs

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Résumé :

The relative importance of long- and short-ranged forces on the thermal fluctuations at polymer interfaces was investigated with neutron reflection. Polyolefin blends were synthesised to create polymer pairs with a tuned interaction parameter, allowing the exploration of situations from near criticality to strongly immiscible cases in thin-film systems. We have observed for the polymer interfacial width, a transition from a region where long-ranged forces dominate, at higher degree of incompatibility, to a region approaching criticality where short-ranged truncation forces are more relevant. © EDP Sciences.