Macromolecular Chemistry and Physics, WILEY-VCH Verlag GmbH
A systematic investigation to fine-tune the cloud point of thermoresponsive poly [2-(dimethylamino)ethyl methacrylate) (p(DMAEMA)) aqueous solutions in a broad temperature interval is reported. For this research, p(DMAEMA)s of different molar mass are quaternized at distinct degrees with methyl iodide to obtain an expanded library of poly[DMAEMA-copoly[ 2-(methacryloyloxy) ethyl] trimethylammonium iodide]s. Turbidity measurements show that depending on the molar mass of p(DMAEMA) and its degree of quaternization, the cloud point of the corresponding aqueous solutions can be adjusted within a rather broad temperature range from 23 to 70 °C. The cloud point and dynamics of the aggregation behavior of these polymers in the aqueous medium are also investigated by dynamic the light scattering. Furthermore, it is also found that the relationship between the molar mass and the cloud point of the respective aqueous solutions obeys an Arrhenius-type model.
For details:
Effect of the Degree of Quaternization and Molar Mass on the Cloud Point of Poly [2-(dimethylamino) ethyl methacrylate] Aqueous Solutions: A Systematic Investigation
Roberto Yañez-Macias (a,b), Isaac Alvarez-Moises (a), Igor Perevyazko (c), Alexey Lezov (c), Ramiro Guerrero-Santos (b), Ulrich S. Schubert (a,d), Carlos Guerrero-Sanchez (a,d)
a. Laboratory of Organic and Macromolecular Chemistry (IOMC), Friedrich Schiller University Jena, Humboldtstrasse 10, 07743 Jena, Germany
b. Departamento de Sintesis de Polimeros, Centro de Investigación en Química Aplicada, Blvd. Enrique Reyna H. 140, 25100 Saltillo, Coahuila, Mexico
c. Department of Molecular Biophysics and Physics of Polymers, St. Petersburg State University, 7/9 Universitetskaya nab., St. Petersburg 199034, Russia
d. Jena Center for Soft Matter (JCSM), Friedrich Schiller University Jena, Philosophenweg 7, 07743 Jena, Germany
Macromol. Chem. Phys. 1700065DOI: 10.1021/acscatal.6b02709
© 2017 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
DOI: 10.1002/macp.201700065
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