The solution behavior of a series of poly(2-oxazoline)s with different side chains, namely methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl, pentyl, hexyl, heptyl, octyl, nonyl, phenyl and benzyl, are reported in ethanol-water solvent mixtures based on turbidimetry investigations. The LCST transitions of poly(2-oxazoline)s with propyl side chains and the UCST transitions of the poly(2-oxazoline)s with more hydrophobic side chains are discussed in relation to the ethanol-water solvent composition and structure. The poly(2-alkyl-2-oxazoline)s with side chains longer than propyl only dissolved during the first heating run, which is discussed and correlated to the melting transition of the polymers.
Bibliographical noteSpecial Issue "Novel Stimuli-Responsive (co)Polymers". Guest Editor Dr. Wei Min Huang
Lambermont - Thijs, H. M. L., Kuringen, van, H. P. C., Put, van der, J. P. W., Schubert, U. S., & Hoogenboom, R. (2010). Temperature induced solubility transitions of various poly(2-oxazoline)s in ethanol-water solvent mixtures. Polymers, 2(3), 188-199. https://doi.org/10.3390/polym2030188