BOUSQUET, Antoine; PANNIER, G.; IBARBOURE, Emmanuel; PAPON, Eric; RODRIGUEZ-HERNANDEZ, Juan

doi:10.1080/00218460701282356

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BOUSQUET, Antoine
Laboratoire de Chimie des polymères organiques [LCPO]

PANNIER, G.
Laboratoire de Chimie des polymères organiques [LCPO]

IBARBOURE, Emmanuel
Laboratoire de Chimie des polymères organiques [LCPO]

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The Journal of Adhesion. 2007, vol. 83, n° 4, p. 335-349

Gordon and Breach Publishing Group

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We report on the preparation of amphiphilic diblock copolymers containing a hydrophilic segment, poly(acrylic acid)(PAA), and a polystyrene hydrophobic part. We analysed, by means of contact-angle measurements, how the hydrophilic segments usually bury themselves under the hydrophobic when exposed to air to reduce the surface free energy of the system. In contrast, in contact with water, the hydrophilic blocks have a tendency to segregate to the interface. We first describe the parameters that control the surface reconstruction when the environmental conditions are inversed from dry air to water vapour. Then, annealing time, temperature, composition and size of the diblock copolymers, and size of the matrix that influenced the surface migration process are the main parameters also considered. Finally, the density of the carboxylic functions placed at the surface was determined using the methylene blue method< Leer menos

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wettability

surface segregation

compatible blends

Diblock copolymers

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Control of the surface properties in polymer blends

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