SYNTHESIS AND CHARACTERIZATION OF POLY(ARYL ETHER)S CONTAINING THE PYRIMIDINE MOIETY

A series of new poly(aryl ether)s containing the pyrimidine moiety wer e prepared by a nucleophilic aromatic substitution polymerization reac tion in an aprotic solvent (DMAc) in the presence of excess potassium carbonate. These polymers are high molecular weight, amorphous, and so luble in common solvents at room temperature. The polymers are easily cast from solution into flexible, colorless, and transparent films. Th ey showed high glass transition temperatures ranging from 198 to 304 d egrees C by DSC analysis. The 5% weight losses by thermogravimetric an alysis ranged from 478 to 580 degrees C, indicating that these polymer s are very thermostable in nitrogen and air. (C) 1998 John Wiley & Son s, Inc.