𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Preparations and properties of phenanthrene - formaldehyde resins

✍ Scribed by Herbert, Lesley D. ;Robinson, J. Gordon ;Marr, George

Publisher
Wiley (John Wiley & Sons)
Year
1981
Tongue
English
Weight
458 KB
Volume
13
Category
Article
ISSN
0007-1641

No coin nor oath required. For personal study only.

✦ Synopsis

Abstract

Phenanthrene was treated with formaldehyde in the presence of sulphuric acid and the yields of resin obtained were dependent on the acid concentration and on the molar ration of formaldehyde to phenanthrene. All of the resins were composed of dimers, trimers, tetramers and higher oligomers. The bridges joining the phenanthryl units were mainly methylene when formaldehyde was in molar deficit relative to phenathrene, but dimethylene ether and acetal bridges were present when the formaldehyde was in molar excess.

📜 SIMILAR VOLUMES

Preparation and properties of phenolated
Preparation and properties of phenolated phenanthrene-formaldehyde resins
✍ Herbert, Lesley D. ;Robinson, J. Gordon ;Marr, George 📂 Article 📅 1982 🏛 Wiley (John Wiley & Sons) 🌐 English ⚖ 351 KB

## Abstract Phenanthrene‐formaldehyde resins of different oxygen content were reacted with phenol 110°C in the presence of a strong acid catalyst. Cleavage occurred at the dimethylene ether and acetal bridges joining the aromatic nuclei with the concomitant formation of phenanthrene‐formaldehyde‐ph

Preparation and properties of phenolated
Preparation and properties of phenolated corn bran (CB)/phenol/formaldehyde cocondensed resin
✍ Seung-Hwan Lee; Mariko Yoshioka; Nobuo Shiraishi 📂 Article 📅 2000 🏛 John Wiley and Sons 🌐 English ⚖ 152 KB 👁 2 views

Corn bran (CB) was liquefied in the presence of phenol at high temperature (200°C) under high pressure (Ͼ1 atm) and the obtained liquefied products were reacted with formaldehyde to get phenolated CB/phenol/formaldehyde resins with excellent yields. The properties of the cocondensed resins were exam