The Effect of Hofmeister Salts on the LCST Transition of Poly(2-oxazoline)s with Varying Hydrophilicity
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Bloksma, Meta M.; Bakker, Daniel J.; Weber, Christine; Hoogenboom, Richard; Schubert, Ulrich S.
- Abstract:
- The influence of Hofmeister salts was investigated on the cloud point of three poly(2-
oxazoline)s, namely poly(2-ethyl-2-oxazoline) [PEtOx], poly(2-n-propyl-2-oxazoline) [PnPropOx],
and poly(2-isopropyl-2-oxazoline) [PiPropOx]. In addition, a comb polymer based on
oligo-2-ethyl-2-oxazoline side chains and a
methacrylate backbone (POEtOxMA) was included
in this investigation. It was found that the ionic
response of the poly(2-oxazoline)s strongly
depends on their hydrophilicity. The comb polymer
POEtOxMA revealed a strikingly similar
response to the salts as linear PEtOx even though
the cloud points of the polymers in water differ.
This indicates that the architecture does not significantly
influence the effect of the Hofmeister
ions, even though there is a difference in the
absolute cloud point.
- Year:
- 2010
- Type of Publication:
- Article
- Journal:
- Macromolecular Rapid Communications
- Volume:
- 31
- Pages:
- 724 - 728