1996 Volume 53 Issue 6 Pages 375-380
The blend film of poly (aryl-ether-ether-ketone) (PEEK) and poly (p-phenylene sulfide) (PPS) was examined by transmission electron microscopy (TEM). A hot solution of each of the homopolymers or the blend, where the numbers of phenylene rings of the two homopolymers were adjusted to be approximately equal, was sandwiched between two glass slides. Then the oriented thin films were prepared by displacing one of the glass slides just after evaporation of the solvent (α-chloronaphthalene). Morphological observation by the defocus contrast method and by dark-field imaging revealed that all these films had fibrillar texture oriented in the shearing direction and also had the stacked-lamellar structure. From the selected-area electron diffraction (ED) experiments, the blend crystal was deduced to be orthorhombic, and the reflections in its ED pattern were indexed in association with the homopolymers. Consequently, the lattice constants of the blend were slightly different from those of the homopolymers.
