✦ LIBER ✦

Application of the graph theory and 13C NMR spectroscopy to describe the configurational statistics of urea-formaldehyde resins

✍ Scribed by S.V. Korolev; S.G. Alekseyeva; S.I. Kuchanov; I.Ya. Slonim; G.S. Matvelashvili; M.G. Slin'ko

Book ID: 116048438
Publisher: Elsevier Science
Year: 1987
Weight: 597 KB
Volume: 29
Category: Article
ISSN: 0032-3950
DOI: 10.1016/0032-3950(87)90239-5

No coin nor oath required. For personal study only.

📜 SIMILAR VOLUMES

Investigations of the chemical structure

Investigations of the chemical structure of sulfonated amino-formaldehyde resins. I 13C-NMR analysis of sulfonated urea-formaldehyde resins

✍ Harald Pasch; Issam S. Dairanieh; Baheeja Al-Tahou 📂 Article 📅 1990 🏛 John Wiley and Sons 🌐 English ⚖ 528 KB

## Abstract ^13^C nuclear magnetic resonance has been successfully used for the determination of the chemical structure of sulfonated urea‐formaldehyde resins. Model compounds (such as dimethylol urea and trimethylene diurea) were prepared and their NMR spectra were analyzed. The model compounds we

13C-NMR study on the structure of phenol

13C-NMR study on the structure of phenol-urea-formaldehyde resins prepared by methylolureas and phenol

✍ Dongbin Fan; Jianmin Chang; Jianzhang Li; An Mao; Lita Zhang 📂 Article 📅 2009 🏛 John Wiley and Sons 🌐 English ⚖ 213 KB 👁 2 views

## Abstract Phenol‐urea‐formaldehyde (PUF) resins were synthesized by reacting mixture of methylolureas (MMU), phenol, and formaldehyde. The structure of PUF cocondensed resins at different stages of reaction were analyzed by liquid ^13^C nuclear magnetic resonance (NMR) spectroscopy. The liquid ^1

Optimizing the conditions of quantitativ

Optimizing the conditions of quantitative 13C-NMR spectroscopy analysis for phenol–formaldehyde resol resins

✍ Petra Luukko; Leila Alvila; Timo Holopainen; Jouni Rainio; Tuula T. Pakkanen 📂 Article 📅 1998 🏛 John Wiley and Sons 🌐 English ⚖ 130 KB 👁 2 views

The experimental time of 13 C-NMR quantitative analysis of phenol-formaldehyde resins was reduced so that quantitativeness was maintained. The quantitative spectra of 14 model resins were obtained using a gated decoupling technique suppressing the NOE. The paramagnetic additive, Cr(acac) 3 , was use

Application of 13 C NMR Spectroscopy and

Application of 13 C NMR Spectroscopy and 13 C-Labeled Benzylammonium Salts to the Study of Rearrangements of Ammonium Benzylides

✍ Zdrojewski, Tadeusz; Jończyk, Andrzej 📂 Article 📅 1998 🏛 American Chemical Society 🌐 English ⚖ 111 KB

Application of High-Resolution 13 C NMR

Application of High-Resolution 13 C NMR Spectroscopy Using Magic Angle Spinning Techniques to the Direct Investigation of Solid Cured Phenolic Resins

✍ Fyfe, C. A.; Rudin, A.; Tchir, W. 📂 Article 📅 1980 🏛 American Chemical Society 🌐 English ⚖ 363 KB

13C NMR spectroscopy of [4.n.0] bicyclic

13C NMR spectroscopy of [4.n.0] bicyclic compounds: Assignment of the ring junction configuration from ring junction configuration from ring junction 13C chemical shifts—application and limits

✍ P. Metzger; E. Casadevall; M. J. Pouet 📂 Article 📅 1982 🏛 John Wiley and Sons 🌐 English ⚖ 505 KB

## REFERENCE DATA of the alcohol into the acetate (7) and ketone (ll), respectively. The C-29 signal in 2, however, is virtually unaffected by acetylation (6), while it is appreciably shielded (3.9 ppm) on conversion to ketone 10. Similar shift behaviour was also observed for the C-29 and C-30 sig