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NMR relaxation dispersion of Miglyol molecules confined inside polymeric micro‐capsules
Author(s) -
Nechifor Ruben,
Ardelean Ioan,
Mattea Carlos,
Stapf Siegfried,
Bogdan Mircea
Publication year - 2011
Publication title -
magnetic resonance in chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.483
H-Index - 72
eISSN - 1097-458X
pISSN - 0749-1581
DOI - 10.1002/mrc.2821
Subject(s) - chemistry , pulsed field gradient , relaxation (psychology) , dispersion (optics) , diffusion , dispersion polymerization , polymer , analytical chemistry (journal) , london dispersion force , molecule , polymerization , chemical physics , chemical engineering , polymer chemistry , chromatography , thermodynamics , organic chemistry , optics , psychology , social psychology , van der waals force , physics , engineering
Frequency dependent NMR relaxation studies have been carried out on Miglyol molecules confined inside core shell polymeric capsules to obtain a correlation between capsule dimension and the measurable parameters. The polymeric capsules were prepared using an interfacial polymerization technique for three different concentrations of Miglyol. It was shown that the variation of Miglyol concentration influences the capsule dimension. Their average size was estimated using the pulsed field gradient diffusometry technique. The relaxation dispersion curves were obtained at room temperature by a combined use of a fast field cycling instrument and a high‐field instrument. The frequency dependence of relaxation rate shows a transition from a diffusion‐limited to a surface‐limited relaxation regime. Copyright © 2011 John Wiley & Sons, Ltd.