The styrene sequence distributions and amount of reacted fumarate units in cured, unsaturated polyester resins were studied by solid-state 13 C nuclear magnetic resonance. Increasing the styrene content and molar ratio of styrene to the double bonds in the polyester chain increased the amount of dia
Carbon-13 liquid- and solid-state nuclear magnetic resonance and infra-red studies of amine-cured epoxy resins
✍ Scribed by A. Fischer; K. Schlothauer; A. Pfitzmann; J. Spèvácek
- Book ID
- 107846514
- Publisher
- Elsevier Science
- Year
- 1992
- Tongue
- English
- Weight
- 333 KB
- Volume
- 33
- Category
- Article
- ISSN
- 0032-3861
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Benzoxazines derived from bisphenol-A, formaldehyde, and primary amines were characterized using 13 C solid-state NMR spectroscopy. The two 1,3benzoxazines studied in this work are 2,2Ј-(3-methyl-4-dihydro-1,3,2-benzoxazine)propane, (B-m) and 2,2Ј-(3-phenyl-4-dihydro-1,3,2-benzoxazine)propane (B-a).
The hypothetical average structures of two coal liquid asphaltenes were determined using solid state 13 C NMR and 1 H NMR data. From the 1 H NMR data average molecular structural parameters were obtained using the Brown-Ladner method to get a general average structure. From the solid state 13 C NMR