4,4-(2,7-Naphthalenedioxy)dibenzoic acid, a new aromatic dicarboxylic acid monomer, was prepared starting from 2,7-dihydroxynaphthalene and p-fluorobenzonitrile in three steps. Using triphenyl phosphite (TPP) and pyridine as condensing agents, a series of novel aromatic polyamides were synthesized b
โฆ LIBER โฆ
Study on tribological properties of frictional material based aromatic polyamide
โ Scribed by Xujun Liu; Tongsheng Li; Nong Tian; Weimin Liu
- Publisher
- John Wiley and Sons
- Year
- 2001
- Tongue
- English
- Weight
- 292 KB
- Volume
- 80
- Category
- Article
- ISSN
- 0021-8995
- DOI
- 10.1002/app.1395
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A novel aromatic dicarboxylic acid monomer, 4,4-(2,3-naphthalenedioxy)dibenzoic acid ( 3), was prepared by the fluorodisplacement reaction of p-fluorobenzonitrile with 2,3-dihydroxynaphthalene in N,N-dimethylformamide (DMF) in the presence of potassium carbonate followed by alkaline hydrolysis of th