Proton diffusion in the room-temperature phase of [(NH4)1−xRbx]3H(SO4)2 as studied by 1H spin-lattice relaxation in the rotating frame

Hayashi, Shigenobu; Omi, Hironori

doi:10.1016/j.ssnmr.2010.05.002

Cited by 4 publications

(1 citation statement)

References 31 publications

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“…Generally speaking, for well dispersed hybrids, just one value of this parameter is found. More than one value is an indication that at least two domains with distinct motilities are present due to the formation of non-homogeneous material 34,35 . Hybrid materials are essentially heterogeneous due to their initial components being organic-inorganic.…”

Section: Nmr Analysismentioning

confidence: 99%

Inorganic-organic hybrids based on poly (ε-Caprolactone) and silica oxide and characterization by relaxometry applying low-field NMR

et al. 2012

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Poly (ε-caprolactone) (PCL) based hybrids containing different amounts of modified (Aerosil ® R972) and unmodified (Aerosil ® A200) silica oxide were prepared employing the solution method, using chloroform. The relationships of the amount of nanofillers, organic coating, molecular structure and intermolecular interaction of the hybrid materials were investigated mainly using low-field nuclear magnetic resonance (NMR). The NMR analyses involved the hydrogen spin-lattice relaxation time (T 1 H) and hydrogen spin-lattice relaxation time in the rotating frame (T 1 ρH). The spin-lattice relaxation time measurements revealed that the PCL/silica oxide hybrids were heterogeneous, meaning their components were well dispersed. X-ray diffraction (XRD), differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA) were also employed. The DSC data showed that all the materials had lower crystallization temperature (Tc) and melting temperature (Tm), so the crystallinity degree of the PCL decreased in the hybrids. The TGA analysis demonstrated that the addition of modified and unmodified silica oxide does not cause considerable changes to PCL's thermal stability, since no significant variations in the maximum temperature (Tmax) were observed in relation to the neat polymer.

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Section: Nmr Analysismentioning

confidence: 99%