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13C n.m.r. characterization of sulphonated urea-phenol-formaldehyde resins

✍ Scribed by Harald Pasch; Issam S. Dairanieh

Publisher
Elsevier Science
Year
1990
Tongue
English
Weight
333 KB
Volume
31
Category
Article
ISSN
0032-3861

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## 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