SYNTHESIS AND CHARACTERIZATION OF NEW POLYESTERS DERIVED FROM 1,6-DIAMANTANEDICARBOXYLIC OR 4,9-DIAMANTANEDICARBOXYLIC ACYL CHLORIDES WITH ARYL ETHER DIOLS

A series of new polyesters was synthesized by high-temperature solutio n polycondensation of 1,6- or 4,9-diamantanedicarboxylic acyl chloride s with aryl ether diols. All polyesters had good solubilities and coul d be soluble in chloroform, nitrobenzene, o-chlorophenol, N-dimethylfo rmamide (DMF), and o-dichlorobenzene. Number-average molecular weights (M-n) of polyesters IV and V were 40 000 similar to 280 000 and 48 00 0 similar to 150 000, respectively. The glass transition temperatures of polyesters were 90-108 degrees C and 102-132 degrees C, as determin ed by differential scanning calorimetry (d.s.c.) and dynamic mechanica l analysis (DMA), respectively. The temperatures at 5% weight loss of polyesters ranged from 338 to 395 degrees C in air and from 385 to 403 degrees C in Nz atmosphere. Polyesters had tensile strengths of 34.9 similar to 45.5 MPa, elongation to breakage values of 3.5 similar to 4 .6%, and initial moduli of 1.4 similar to 1.6 GPa. (C) 1998 Elsevier S cience Ltd. All rights reserved.