New polymer syntheses—71. Aromatic polyethers with ester groups in the backbone

✍ Scribed by Hans R. Kricheldorf; Claas Jürgens

• Book ID: 103075844
• Publisher: Elsevier Science
• Year: 1993
• Tongue: English
• Weight: 328 KB
• Volume: 29
• Category: Article
• ISSN: 0014-3057
• DOI: 10.1016/0014-3057(93)90283-l

✦ Synopsis

Aromatic poly(ether-ester)s were prepared by two procedures. First, polycondensation of activated difluoroaromatics (such as 4,4'-difluorodiphenylsulphone, 2,6-difluorobenzonitrile or 2,6-difluoropyridine) was performed with a silylated reaction partner in bulk at temperatures up to 320 °. Second, polycondensation of the same reactants was done in N-methylpyrrolidone-3 at 180 °. Three kinds of silylated monomers were used, viz. hydroquinone 4-hydroxybenzoate, 6-hydroxy-2-naphthoic acid, and several dicarboxylic acids. All attempted polycondensations with silylated dicarboxylic acids failed. The highest yields and molecular weights (h7 w up to 105) were obtained by polycondensations of silylated hydroquinone 4-hydroxybenzoate in bulk.