Regensburg 2016 – wissenschaftliches Programm

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 47: Poster: Interfaces and Thin Films

CPP 47.20: Poster

Mittwoch, 9. März 2016, 18:15–21:00, Poster B2

Comparison of the Swelling behavior of thin cross-and non-crosslinked ethylene glycol based polymer film — •Jessica Hübner, Dikran Kesal, Stefan Wellert, and Regine von Klitzing — Stranski Laboratorium f. Physikalische und Theoretische Chemie, TU Berlin, Str. d. 17. Juni 124, Berlin 10623, Germany

Two intensively studied classes of coatings are polymer brushes and layers of microgel particles at planar solid surfaces. Brushes are polymers, tethered at one end to the substrate while microgels are colloidal particles with an inner polymer network structure based on chemical cross-linking. Here, we compare the properties of ethylene glycol based brushes and microgel particles at silicon surfaces in terms of their swelling/deswelling behavior and volume phase transition temperature depending on comonomer content and synthesis conditions. For both systems the monomer was 2-(2-Methoxy-ethoxy)ethyl methacrylate and the comonomer Poly(ethylene glycol)methyl ether methacrylate. In both architectures, the volume phase transition temperature can be tailored by changing the amount of comonomer. Beside ellipsometry also AFM measurements under ambient conditions and in the water swollen state were used to characterize the brushes and micogels.