Carelli, C.; Jones, R.A.L.; Young, R.N.; Cubitt, R.; Krastev, R.; Gutberlet, T.; Dalgliesh, R.; Schmid, F.; Sferrazza, M.: The effects of long-ranged and short-ranged forces in confined near-critical polymeric liquids. Europhysics Letters 71 (2005), p. 763-769
10.1209/epl/i2005-10162-7
Abstract:
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.