Temperature Induced Solubility Transitions of Various Poly(2-oxazoline)s in Ethanol-Water Solvent Mixtures

Lambermont-Thijs, Hanneke M. L.; van Kuringen, Huub P. C.; van der Put, Jeroen P. W.; Schubert, Ulrich S.; Hoogenboom, Richard

Abstract:

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.

Year:

2010

Type of Publication:

Article

Keywords:

poly 2 oxazoline; solubility transitions; ethanol water; LCST; UCST; thermoresponsiveness

Journal:

Polymers

Volume:

2

Pages:

188 - 199