ISIS Neutron and Muon Source Data Journal

Cononsolvency of Poly(N,N-Diethyl Acrylamide) (PDEA) in water/ethanol mixtures at 27 degree C

Abstract: Cononsolvency is a rare phenomenon that the solubility of a polymer decreases or even vanishes in the mixture of good solvents [Macromolecules 1991, 24, 948]. Although PDEA is thought to be soluble in water/organic solvent mixtures, our recent small angle neutron scattering (SANS) measurement in Sans2d shows that it also shows re-entrance behavior in water/ethanol mixtures, i.e., coil-to-globule-to-coil, at 27 degree C. The origin of cononsolvency has been argued for decades. Basically, there are two kinds of explanations now, i.e., “competitive adsorption” [PRL 2008, 101, 028302], and the formation of a stoichiometric compound between the solvent molecules which is a poor solvent for the polymer [Phys. Rev. Lett. 2001, 86, 822]. Through the UK-China Research and Innovation Partnership Fund, we propose to use NIMROD and inverse Monte-Carlo Simulation to reveal the its origin.

Principal Investigator: Dr He Cheng
Local Contact: Dr Tristan Youngs

DOI: 10.5286/ISIS.E.RB1610067

ISIS Experiment Number: RB1610067

Publisher: STFC ISIS Neutron and Muon Source

Data format: RAW/Nexus
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Data Citation

The recommended format for citing this dataset in a research publication is as:
[author], [date], [title], [publisher], [doi]

For Example:
Dr He Cheng et al; (2016): Cononsolvency of Poly(N,N-Diethyl Acrylamide) (PDEA) in water/ethanol mixtures at 27 degree C, STFC ISIS Neutron and Muon Source, https://doi.org/10.5286/ISIS.E.RB1610067

Data is released under the CC-BY-4.0 license.