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

Polymers

Hanneke M. L. Lambermont-Thijs¹  Huub P. C. van Kuringen¹  Jeroen P. W. van der Put¹  Ulrich S. Schubert¹ 

[1] Laboratory of Macromolecular Chemistry and Nanoscience, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands; E-Mails:

关键词: poly(2-oxazoline);    solubility transitions;    ethanol-water;    LCST;    UCST;    thermoresponsiveness;   

DOI  :  10.3390/polym2030188

来源: mdpi

【 摘 要 】

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.

【 授权许可】

CC BY   
© 2010 by the authors; licensee MDPI, Basel, Switzerland.