Fluorinated segments in copolymer impact their bulk structure and interfacial properties. Here we probe the interfacial response of the thin films of polytrifluoro propyl methyl siloxane-<i>b</i>-polystyrene to temperature change using atomic force microscopy, contact angle measurement and neutron reflectometry. Thin films with volume fractions of the fluorinated block ranging from 0.03 to 0.46 were annealed at the temperatures above the glass transition temperature of the diblock. Surface induced layering was observed for all volume fractions of fluorinated block with the air interface rich with the fluorinated segments and the substrate interface was dominated by protonated block. Surprisingly the film did not dewet even at the temperature significantly higher than that of the diblock.

Semifluorinated diblock copolymer under confinement: A neutron reflectivity study

251st National Meeting (2016)

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