Carbon-13 solid state NMR

Zaper, A.M. and Koenig, J.L. (1985). Application of solid state carbon-13 NMR spectroscopy to chemically modified surfaces. Polym. Composites 6, 156-161. 

Andreis M, Liu J, Koenig JL (submitted to J. Polym. Sci., Polym. Phys. Edn. for publ.) Solid state carbon-13 NMR studies of vulcanized elastomers. V. Observation of new structures in sulfur vulcanized natural rubber... 

Baldock J. A., Oades J. M., Waters A. G., Peng X., Vassallo A. M., and Wilson M. A. (1992) Aspects of the chemical stmcture of soil organic materials as revealed by solid-state carbon-13 NMR spectroscopy. Bio geochemistry (Dordrecht) 16(1), 1-42. 

Byrn, S.R. Gray, G. Pfeiffer, R.R. Frye, J. Analysis of solid-state carbon-13 NMR spectra of polymorphs (benox-aprofen and nabilone) and pseudopolymorphs (cefazolin). J. Pharm. Sci. 1985, 74 (5), 565-568. 

Oades, J. M., Vassallo, A. M., Waters, A. G., and Wilson, M. A. (1987). Characterization of organic matter in particle size and density fractions from a red-brown earth by solid-state carbon-13 NMR. Aust. J. Soil Res. 25,71-82. 

Atalla RH, VanderHart DL. The role of solid-state carbon-13 NMR spectroscopy in studies of native celluloses. Solid State NMR 1999 15 1-19. Chen Y-Y, Luo S-Y, Hung S-C, Sunney I, Tzou D-LM. C solid-state NMR chemical shift anisotropy analysis of the anomeric carbon in carbohydrates. Carbohydr Res 2005 340 723-729. 

Characterization by High-Resolution Solid-State Carbon-13 NMR... 

We report here the application of the solid state carbon-13 1 1R with cross-polarization (CP), high power proton decoupling, and magic-angle sample spinning (MAS) to study the curing of epoxy resins. On the basis of our preliminary studies, we show here the application of solid state carbon-13 NMR spectroscopic data to determine some of the Important parameters such as the gelation point and effective functionality of the epoxy monomers. 

Some of the solid state carbon-13 NMR spectra of cured epoxy polymers are shown In Figure 1. The resonance peaks are assigned with the aid of the carbon resonance assignments of the monomers... 

In summary, we have shown here the usefulness of solid state carbon-13 NMR spectroscopy to characterize an epoxy resin network. Curing of epoxy resins can be followed using carbon-13 NMR spectroscopy. This technique is useful for characterization of Insoluble polymers. Our data anlaysls enable us to find the Important parameters required In the network analysis such as the gelation point. 

Saindon, P.J. (1992) Solid Pharmaceuticals Analysis and Identification by Solid-state Carbon-13 NMR, PhD thesis, Purdue Univo sity, West Lafayette, IN. 

Solid-State Carbon-13 NMR and Wide-Angle X-ray Scattering Study of Cellulose Disordering by Alkali li atnient... 

The structure of EPDM grafted onto polyamide 66 was analysed with high resolution solid state carbon-13 NMR and IR spectroscopy. Details about the EPDM rubber include the amount of mbber incorporated into this blend, the sequence analysis of the EPDM mbber and an estimate... 

Pawlowski W.P., Sankar S.S., Gilbert R.D., Fornes R.D., Synthesis and solid state carbon-13 NMR studies of some cellulose derivatives, J. Polym. Sci. A Polym. Chem., 25, 1987, 3355-3362. 

Terao T, Maeda S, Saika A (1983) High-resolution solid-state carbon-13 NMR of poly(vinyl alcohol) enhancement of tacticity splitting by intramolecular hydrogen bonds. Macromolecules 16 1535... 

Solid-state carbon-13 NMR studies of these copolymers also demonstrate isodimorphism over the complete composition range.(135,136) These studies are consistent with the plot in Fig. 5.17 and the x-ray diffraction results. Moreover, the NMR studies have also shown that the 3HB/3HV ratio in the crystalline phase of poly-(3-hydroxy butyrate-co-3-hydroxy valerate) is less than that for the nominal composition of the copolymer. The minor component thus enters the lattice at a smaller concentration than the composition of the pure melt. The ratio of 3HV in the crystal to that in the melt increases with increasing 3HV content. In principle, a complete conventional type phase diagram based on composition could be obtained by this method. We should recall, however, that when treating copolymers the important quantity is the sequence distribution within the crystal relative to that of the melt. 

D. L. VanderHart, and R. H. Atalla, Studies of microstructure in native celluloses using solid-state carbon-13 NMR. Macromolecules 17, 1465-1472 (1984). 

K. (1992) Composition dependence of the miscibility and phase structure of amorphous/crystaDine polymer blends as studied by high-resolution solid-state carbon-13 NMR spectroscopy. Macromolecules, 25 (9), 2336-2340. 

Solid-state carbon-13 NMR studies [453-456] indicated that, in addition to the bridging groups shown in the above schemes, bridges such as... 

HIGH RESOLUTION SOLID-STATE CARBON 13 NMR STUDY OF AS-CURED AND IRRADIATED EPOXY RESINS... 

A collection of high resolution solid-state Carbon-13 NMR spectra of a wide range of polymers is presented. It is useful for reference purposes in case of unknown or partly unknown samples, such as polymer blends, block copolymers or polymeric latices. 16 refs. 

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