A. Goodwin et R. Marsh, DIELECTRIC AND DYNAMIC-MECHANICAL RELAXATION OF POLY(ETHER ETHER KETONE) POLY(ETHERIMIDE) BLENDS BELOW THE GLASS-TRANSITION/, Macromolecular rapid communications, 17(7), 1996, pp. 475-480
Dielectric relaxation spectroscopy (DRS) and dynamic mechanical therma
l analysis (DMTA) were used to investigate the secondary relaxation be
haviour of poly(ether ether ketone) (PEEK), poly(etherimide) (PEI) and
a miscible PEEK/PEI blend. The data from each technique, for the gamm
a-process, did not lie on the same Arrhenius line, while the rate of m
olecular motion of the gamma-process in the blends was Largely an aver
age of each component's motions. The beta-process in PEI was plasticis
ed by the presence of PEEK.