The dynamics of amorphous aromatic polyesters consisting of poly(ethylene terephthalate) (PET), poly(ethylene isophthalate) (PEI), and poly(ethylene 2,6-naphthalenedicarboxylate) (PEN) has been investigated by means of solid state CPMAS 13 C NMR. Proton T 2 , 13 C T 1r , and proton T 1r decays have
13C-CPMAS NMR characterization and molecular dynamics of oligothiophenes in the solid state
โ Scribed by Dr. Giovanna Barbarella; Massimo Zambianchi; Laura Favaretto; Sandra Rossini; Dr. Daniele Casarini
- Publisher
- John Wiley and Sons
- Year
- 1996
- Tongue
- English
- Weight
- 564 KB
- Volume
- 8
- Category
- Article
- ISSN
- 0935-9648
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13 C labeling was used to enhance the sensitivity of 13 C solid-state NMR to study the effect of tabletting on the polymorphism of a steroidal drug. The steroidal drug Org OD 14 was 13 C labeled and formulated into tablets containing only 0.5-2.5% active ingredient. The tablets were subsequently
## Abstract Gel networks prepared from aqueous melamineโformaldehyde resins via a solโgel route were characterised by ^13^C CPMAS (where MAS stands for magic angle spinning)โNMR and __T__~2~ relaxation. We show that within the aqueous networks, the type and amount of functional groups on the melami