R. Gensler et al., TENSILE BEHAVIOR AND FRACTURE-TOUGHNESS OF POLY(ETHER ETHER KETONE) POLY(ETHER IMIDE) BLENDS/, Polymer bulletin, 37(1), 1996, pp. 111-118
The bulk tensile behaviour of poly(ether ether ketone) and poly(ether
imide) homopolymers and their blends has been investigated, and the te
mperature and strain rate dependence of the yield stress discussed in
terms of simple Eyring rate theory. In fracture mechanics tests, the K
-IC of PEEK was found to decrease significantly with increasing test s
peed, whereas the K-IC of PEI showed little rate sensitivity. Therefor
e, although a gradual increase in K-IC with increasing PEEK content wa
s observed in the blends at low loading rates, this effect was anticip
ated to be less pronounced at higher loading rates.