Regensburg 2013 – wissenschaftliches Programm

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 18: Poster: Polymer Dynamics

CPP 18.13: Poster

Dienstag, 12. März 2013, 18:15–20:15, Poster C

Novel thermoresponsive polymers in various architectures — •Konstantinos Kyriakos¹, Sarah Ottinger¹, Anna Miasnikova², André Laschewsky², Peter Müller-Buschbaum¹, and Christine M. Papadakis¹ — ¹TU München, Physikdepartment, Physik weicher Materie, Garching — ²Universität Potsdam, Fakultät für Chemie, Potsdam-Golm

Amphiphilic copolymers with a thermoresponsive block have attracted interest, mainly because of their ability to self-assemble into micelles with a thermoresponsive shell in water. Poly(methoxy diethyleneglycol acrylate) (PMDEGA) is a new thermoresponsive polymer, which exhibits critical temperatures in the range 35-45 ^∘C.

We report here on fluorescence correlation spectroscopy (FCS) experiments on various PMDEGA-PS systems, focusing on the effect of the different molecular architectures.We studied a P(S-b-MDEGA) diblock, a P(S-b-MDEGA-b-S) triblock and a (P(MDEGA-b-S))₃ three-arm star copolymer. Information about the critical micelle concentration (CMC) and the hydrodynamic radius (r_H) were obtained. In agreement with our previous results [1], we observe a strong dependence of the different chain architectures on the CMC of the studied systems. Moreover, the r_H of the micelles varied with chain architectures.

[1] A. Miasnikova, A. Laschewsky, C.M. Papadakis, P. Müller-Buschbaum, et al., Langmuir (2012), 28, 4479