Dresden 2017 – wissenschaftliches Programm
CPP 52.9: Poster
Mittwoch, 22. März 2017, 18:30–21:00, P3
Functional polymers based on diaminopyridine motif with tunable UCST behavior in alcohol and water/alcohol mixtures — Asad Asadujjaman1, Vahid Ahmadi Soureshjani1, Meral Yalcin2, Niels ten Brummelhuis2, and •Annabelle Bertin1,3 — 1Federal Institute for Materials Research and Testing, Unter den Eichen 87, 12205 Berlin, Germany — 2Humboldt Universität zu Berlin, Department of Chemistry, Brook-Taylor-Str. 2, 12489 Berlin, Germany — 3Freie Universität Berlin, Institute of Chemistry and Biochemistry, Takustr. 3, 14195 Berlin, Germany
Thermoresponsive polymers are of great importance in numerous applications such as bioseparation, drug delivery, diagnostic and microfluidic applications. Only few thermoresponsive polymers that present an upper critical solution temperature (UCST), i.e. phase separate from solution upon cooling, in a relevant temperature range and green solvents such as water or ethanol have been reported. Indeed, polymers with UCST behavior below 60°C in alcohol or water/alcohol mixtures are extremely promising for the preparation of smart materials for sensing. In this work two novel functional polymers of based on a 2,6-diaminopyridine motif were synthesized by free radical polymerization. Their UCST-type transition temperature is tunable by varying either their concentration in solution or the type of solvent. Insights into this phenomenon will be given based on turbidimetry and temperature dependent dynamic light scattering.