Deuteration-Induced Volume Phase Transition Temperature Shift of PNIPMAM Microgels

Cors M, Wiehemeier L, Oberdisse J, Hellweg T (2019)
Polymers 11: 620.

Zeitschriftenaufsatz | Veröffentlicht | Englisch
 
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Abstract / Bemerkung
The effect of deuteration on the volume phase transition (VPT) temperature of poly (N-isopropylmethacrylamide) (pNIPMAM) microgels in aqueous suspension is determined via IR spectroscopy and size measurements by photon correlation spectroscopy (PCS). We study the effect of a hydrogenated and a deuterated solvent (H2O/D2O), and of the hydrogenated and (partially) deuterated monomer. Deuteration of the monomer or copolymerization with deuterated monomers shifts the volume phase transition temperature (VPTT) by up to 8.4 K to higher temperatures, in good agreement with known results for pNIPAM microgels. Moreover, the shape of the swelling curve is found to depend on deuteration, with the highest deuteration leading to the sharpest VPT. Finally, the quantitative agreement between FTIR spectroscopy and PCS evidences the spatial homogeneity of the microgel particles. Our results are rationalized in terms of the effect of deuteration on hydrogen bonding. They shall be of primary importance for any experimental measurements close to the VPT involving isotopic substitution, and in particular contrast variation small angle neutron scattering.
Stichworte
microgel; deuteration; isotope effect; NIPMAM; VPTT shift
Erscheinungsjahr
2019
Zeitschriftentitel
Polymers
Band
11
Art.-Nr.
620
eISSN
2073-4360
Finanzierungs-Informationen
Article Processing Charge funded by the Deutsche Forschungsgemeinschaft and the Open Access Publication Fund of Bielefeld University.
Page URI
https://pub.uni-bielefeld.de/record/2934769

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Cors M, Wiehemeier L, Oberdisse J, Hellweg T. Deuteration-Induced Volume Phase Transition Temperature Shift of PNIPMAM Microgels. Polymers. 2019;11: 620.
Cors, M., Wiehemeier, L., Oberdisse, J., & Hellweg, T. (2019). Deuteration-Induced Volume Phase Transition Temperature Shift of PNIPMAM Microgels. Polymers, 11, 620. doi:10.3390/polym11040620
Cors, M., Wiehemeier, L., Oberdisse, J., and Hellweg, T. (2019). Deuteration-Induced Volume Phase Transition Temperature Shift of PNIPMAM Microgels. Polymers 11:620.
Cors, M., et al., 2019. Deuteration-Induced Volume Phase Transition Temperature Shift of PNIPMAM Microgels. Polymers, 11: 620.
M. Cors, et al., “Deuteration-Induced Volume Phase Transition Temperature Shift of PNIPMAM Microgels”, Polymers, vol. 11, 2019, : 620.
Cors, M., Wiehemeier, L., Oberdisse, J., Hellweg, T.: Deuteration-Induced Volume Phase Transition Temperature Shift of PNIPMAM Microgels. Polymers. 11, : 620 (2019).
Cors, Marian, Wiehemeier, Lars, Oberdisse, Julian, and Hellweg, Thomas. “Deuteration-Induced Volume Phase Transition Temperature Shift of PNIPMAM Microgels”. Polymers 11 (2019): 620.
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2019-09-06T09:19:06Z
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Dissertation, die diesen PUB Eintrag enthält
Structure property correlations of microgels with complex architectures
Cors M (2019)
Bielefeld: Universität Bielefeld.

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