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How does the type of counterion influence the polymerization rate and thermal properties of tailored choline-based linear- and star-shaped poly(ionic liquid)s PILs? |
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| Authors: | Paulina Maksym Magdalena Tarnacka Kamila Wolnica Andrzej Dzienia Andrzej Zi?ba Kamil Kaminski Marian Paluch |
| Institution: | 1. Institute of Physics, University of Silesia, ul. 75 Pulku Piechoty 1, 41-500 Chorzow, Poland;2. Institute of Physics, University of Silesia, ul. 75 Pulku Piechoty 1, 41-500 Chorzow, Poland
Silesian Center of Education and Interdisciplinary Research, University of Silesia, ul. 75 Pulku Piechoty 1A, 41-500 Chorzow, Poland;3. Silesian Center of Education and Interdisciplinary Research, University of Silesia, ul. 75 Pulku Piechoty 1A, 41-500 Chorzow, Poland Institute of Chemistry, University of Silesia, ul. Szkolna 9, 40-007 Katowice, Poland;4. Department of Organic Chemistry, School of Pharmacy with the Division of Laboratory Medicine in Sosnowiec, Medical University of Silesia in Katowice, ul. Jagiellońska 4, 41-200 Sosnowiec, Poland |
| Abstract: | The synthesis of tailored 2-(methacryloyloxy)ethyl]-trimethylammonium chloride (ChMA/Cl?) and bis(trifluoromethanesulfonate) imide (ChMA/NTf2?)-based ionic homopolymers by sustainable activators generated by electron transfer atom transfer radical polymerization (ATRP) method has been demonstrated. Linear and four-arm star-shaped macromolecules were obtained with the use of two synthetic strategies: (a) direct polymerization of ionic monomers with counterions differing in hydrophilicity (prepolymerization) and (2) modification by ion exchange from Cl? to NTf2? (postpolymerization) using both classical ATRP initiator and pentaerythritol-based initiator. The effect of counterions on the polymerization kinetics and the physicochemical and thermodynamical properties of resulted poly(ionic liquid)s (PILs) has been investigated. Results showed that polymerizations of ChMA/NTf2? proceeded with higher rate in comparison to ChMA/Cl? one independently on the predetermined topologies (linear and four-arm star-shaped). From thermodynamical point of view, the glass transition temperature Tg increased with molecular weight Mn for linear- and star-shaped PILs for both types of counterion. In addition, star-shaped polymers of comparable Mn to linear ones were characterized by slightly higher Tg values. The resulting polyelectrolytes, after modification via exchange of Cl? anions to NTf2? ones were characterized by much higher Tg in comparison to those produced by direct polymerization of ionic monomer, indicating the crucial role of postpolymerization modification on thermodynamical properties of PILs. © 2018 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2018 , 56, 2681–2691 |
| Keywords: | AGET ATRP choline methacrylate glass transition temperature star polymers |