Phosphorus pentoxide/methanesulphonic acid (PPMA) was used as both solvent and condensing agent for the preparation of polynaphthimidazoles (PNIs) through direct polycondensation. The reactions of 2,6-naphthalene dicarboxylic acid and dimethyl 2,6-naphthalene dicarboxylate with tetramine monomer wer
β¦ LIBER β¦
Sodium Naphthalene. II. Preparation and Properties of Dihydronaphthalene Dicarboxylic Acids
β Scribed by Walker, J. F.; Scott, N. D.
- Book ID
- 121418005
- Publisher
- American Chemical Society
- Year
- 1938
- Tongue
- English
- Weight
- 546 KB
- Volume
- 60
- Category
- Article
- ISSN
- 0002-7863
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## Abstract Aspartic acid is prepared chemically or by the fermentation of carbohydrates. Currently, low molecular weight polyaspartic acids are prepared commercially by heating aspartic acid at high temperatures (>220Β°C) for several hours in the solid state. In an effort to develop a more rapid, c