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17–19 Sept 2018
Fakultät für Maschinenwesen der Technischen Universität München
Europe/Berlin timezone

Phase behavior and solution structure of new UCST- and LCST-type polymers

18 Sept 2018, 16:00
1h 30m
Fakultät für Maschinenwesen der Technischen Universität München

Fakultät für Maschinenwesen der Technischen Universität München

Boltzmannstraße 15 85748 Garching b. München
Poster P2 Soft matter Poster session 2

Speaker

Mr Arne Lerch (Physical Chemistry I, Heinrich-Heine-University Duesseldorf)

Description

Thermoresponsive polymers are an interesting class of material for industrial and medical applications and also for fundamental research. Lower critical solution temperature (LCST) polymers, such as poly(N-isopropylacrylamide), are common and well-studied, whereas materials with an upper critical solution temperature (UCST) still are rare and not well examined. Depending on the material used, the transition temperature can be varied by different parameters, which can enlarge the potential field of applications. Here, not only it is interesting to tailor the temperature, at which the phase transition occurs, also it is interesting to control the type of transition, i.e. from LCST to UCST or vice versa. We synthesized acryl-amide based copolymers that, depending on the composition, display either a LCST behavior, or a UCST-like phase behavior. We used turbidity measurements, static and dynamic light scattering as well as small angle neutron scattering (SANS) to study the phase behavior of our polymers on global and local length scales. In particular, from SANS important information on the polymer structure is accessible.

Primary author

Mr Arne Lerch (Physical Chemistry I, Heinrich-Heine-University Duesseldorf)

Co-authors

Mr Florian Käfer (Macromolecular Chemistry II, University Bayreuth) Prof. Seema Agarwal (Macromolecular Chemistry II, University Bayreuth) Matthias Karg (Physical Chemistry I, Heinrich-Heine-University Duesseldorf, 40225 Duesseldorf, Germany)

Presentation materials

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