Homoepitaxial crystallization in films of a thermotropic liquid crystalline chloro-poly(aryl ether ketone)

The homoepitaxial crystallization in the films of a thermotropic liquid cry stalline chloro-ply(aryl ether ketone) is studied by transmission electron microscopy (TEM) and electron diffraction (ED). The homoepitaxy takes place in the temperature range 330-320 degreesC, in which a highly-ordered smect ic crystalline phase of the copolymer with a single-crystal-like banded str ucture is formed during the cooling process from the isotropic melt. The ho moepitaxial crystallizations with angles of 32 degrees and 122 degrees betw een the two b axes are the major populations observed, and possess epitaxia l contact planes of (100)(I)-(210)(II) and (010)(I)-(210)(II); respectively .