TY - JOUR A1 - Asadujjaman, Asad A1 - Ahmadi, Vahid A1 - Yalcin, M. A1 - ten Brummelhuis, N. A1 - Bertin, Annabelle T1 - Thermoresponsive functional polymers based on 2,6-diaminopyridine motif with tunable UCST behaviour in water/alcohol mixtures JF - Polymer Chemistry N2 - 2,6-Diaminopyridine based functional polymers poly N-(6-aminopyridin-2-yl)acrylamide) (PNAPAAm) and poly(N-(6-acetamidopyridin-2-yl)acrylamide) (PNAcAPAAm) were synthesized via free radical polymerization and in addition PNAcAPAAm was synthesized by reversible addition–fragmentation chain transfer (RAFT) polymerization for comparison. The obtained polymers displayed upper critical solution temperature (UCST)-type reversible thermoresponsiveness in water/alcohol mixtures. The UCST Phase transition behaviour of the obtained functional polymers was studied using temperature dependent turbidimetry, dynamic light scattering and 1H-NMR measurements. The phase transition temperature of the polymers was tunable by varying either the concentration of the polymer solution, the nature of the alcohol or the composition of the solvent mixture. The cloud Point temperature of PNAcAPAAm was found to decrease with increasing alcohol content (MeOH, EtOH and iPrOH) in water/alcohol mixtures. Past a critical amount of EtOH or iPrOH in water, the cloud point temperature of PNAcAPAAm increased upon further addition of EtOH or iPrOH. Such functional polymers with tunable UCST behaviour can be applicable in drug delivery, sensing, personal care and microfluidic applications. KW - UCST polymer KW - 2,6-diaminopyridine KW - Cosolvency PY - 2017 DO - https://doi.org/10.1039/c7py00539c SN - 1759-9954 SN - 1759-9962 VL - 8 IS - 20 SP - 3140 EP - 3153 PB - RSC AN - OPUS4-40417 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -