Polyamides containing arylene, ether and ketone linkages

✍ Scribed by V.L. Rao; P.V. Prabhakaran

• Publisher: Elsevier Science
• Year: 1992
• Tongue: English
• Weight: 281 KB
• Volume: 28
• Category: Article
• ISSN: 0014-3057
• DOI: 10.1016/0014-3057(92)90255-z

✦ Synopsis

Several aromatic polyamides were prepared from aromatic dicarboxylic acids with two diamines containing carbonyl and ether connecting groups between the aromatic rings; the phosphorylation route was used. The synthesis of these diamines involves a nucleophilic displacement reaction in dipolar aprotic solvent with the alkali metal salt of p-aminophenol/m-aminophenol and an activated aromatic difluoro compound. The polymers were characterized by solution viscosity, elemental analysis, thermogravimetric analysis, differential scanning calorimetry and X-ray diffraction. The polymers, obtained in 8545% yield, possessed inherent viscosities in the range 0.32-0.68 dl/g and glass transition temperatures between 114 and 170°C. The effects of the structure on properties such as solubility, molecular weight, Tg, crystallinity and thermal behaviour were also studied.