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- W2023689285 abstract "Polyhedral oligomeric azido-octaphenylsilsesquioxane (N3-OPS) was synthesized from octaaminophenylsilsesquioxane (OAPS) via its diazonium salt. The synthesis included nitration of octaphenylsilsesquioxane (OPS) to octanitrophenylsilsesquioxane (ONPS), conversion of ONPS into octaaminophenylsilsesquioxane (OAPS), and conversion of OAPS into N3-OPS. The kinetics of the conversion of OAPS into N3-OPS were studied by recording the volume of N2 gas released with the reaction time, which revealed it to be a 1st order reaction. The chemical structures of ONPS, OAPS and N3-OPS were characterized by 1H-NMR, GPC, FTIR, 29Si solid NMR, 13C-NMR, XRD, and elemental analysis. It is proposed that the diazonium salt of OAPS was substituted by the main N3 group and a few of the OH groups. The ratio of N3:OH was calculated to be approximately 68:32 in N3-OPS on the basis of the elemental analysis and 1H-NMR. XRD suggested that N3-OPS was a kind of amorphous compound. The two-step conversion mechanism of OAPS to N3-OPS was briefly discussed. TGA results showed that N3-OPS was stable at ambient temperature. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2012" @default.
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- W2023689285 date "2011-12-01" @default.
- W2023689285 modified "2023-09-27" @default.
- W2023689285 title "Synthesis and characterization of polyhedral oligomeric azido-octaphenylsilsesquioxane" @default.
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- W2023689285 doi "https://doi.org/10.1002/app.35431" @default.
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