| 摘要 |
PURPOSE:To obtain a novel polymer having a high mechanical strength when formed into fibers and improved moldability, by polymerizing a specific imide group-containing dihydric phenol with p-hydroxygenxoic acid, dihydroxydiphenyl and diphenyl carbonate. CONSTITUTION:An imide group-containing dihydric phenol expressed by formula I is reacted with p-hydroxygenzoic acid, 4,4'-dihydroxydiphenyl and diphenyl carbonate at 200-450 deg.C normally under ordinary - reduced pressure for 0.5-5hr to afford the aimed polymer having k repeating units expressed by formula II, l repeating units expressed by formula III and m repeating units expressed by formula IV, 0.1-0.5 value of k/(k+l+m) and >=0.3dl/g reduced viscosity measured by using a solution of 2g/dl concentration in p-chlorophenol as a solvent at 60 deg.C.
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